Disclosure of Invention
In order to overcome the defects that the traditional head massage device can not automatically massage the head of a patient and has heavy volume and mass, the invention provides a head massage physical therapy device for the psychiatric department, which can automatically massage the head of the patient and has light volume and mass.
The invention is realized in this way, a head massage physiotherapy device for psychiatric department, comprising: first connecting pipe, promotion massage mechanism and drive mechanism, the inside promotion massage mechanism that is equipped with of first connecting pipe, the inside drive mechanism that is equipped with of first connecting pipe, promotion massage mechanism includes: the inside second connecting pipe that is equipped with of first connecting pipe, second connecting pipe outside upper portion slidingtype are equipped with many slip massage poles, and many slip massage pole outsides are all around having first spring, and first spring both ends are connected with second connecting pipe and slip massage pole respectively.
Further, the driving mechanism includes: the rotary connecting ring is arranged on the lower side inside the first connecting pipe, the rotary connecting pipe is arranged in a rotary mode on the top of the rotary connecting ring, a plurality of first sliding sleeves are arranged on the lower side inside the rotary connecting pipe, first sliding driving rods are arranged in the middle of the first sliding sleeves in a sliding mode, seventh springs are wound on the first sliding driving rods, the two ends of each seventh spring are connected with the first sliding sleeves and the first sliding driving rods respectively, a motor is installed on the upper portion of the inner wall of the first connecting pipe, and a first transmission assembly is connected between a motor output shaft and the rotary connecting pipe.
Further, the slide pressing mechanism is further included, and the slide pressing mechanism includes: the middle of the top of the second connecting pipe is provided with a first connecting rod, the lower side of the first connecting rod is provided with a sliding driving pipe in a sliding mode, the upper side of the first connecting rod is wound with a second spring, and the two ends of the second spring are respectively connected with the first connecting rod and the sliding driving pipe.
Further, still include locking mechanical system, locking mechanical system includes: the two sides of the top of the sliding driving pipe are both provided with first driving rods, the two sides of the upper part of the first connecting rod are both provided with second sliding sleeves, the lower sides of the two second sliding sleeves are both provided with sliding clamping rods in a sliding mode, the inner sides of the two sliding clamping rods are both wound with third springs, and the two ends of each third spring are respectively connected with the second sliding sleeves and the sliding clamping rods.
Further, still include automatic intermittent type release mechanism, automatic intermittent type release mechanism includes: the upper side in the rotating connecting pipe is provided with a rotating gear, the upper portion of the first connecting rod is provided with a rotating fixed rod, the rotating fixed rod is provided with a rotating driving rod in a rotating mode, the upper side of the rotating driving rod is provided with a first straight gear, the lower portion of the rotating fixed rod is provided with a second connecting rod, the second connecting rod is provided with a second sliding driving rod in a sliding mode, the second connecting rod is provided with a fourth spring in a winding mode, and the two ends of the fourth spring are connected with the second connecting rod and the second sliding driving rod respectively.
Further, still include the time switch mechanism, the time switch mechanism includes: first connecting pipe inner wall upper portion is equipped with the third connecting rod, and the gliding style is equipped with the third drive pole on the third connecting rod, and third connecting rod downside is around having the fifth spring, and the fifth spring both ends are connected with third connecting rod and third drive pole respectively, and the slidingtype is equipped with presses the driving disk in the middle of the first connecting pipe upper portion, presses the driving disk and is connected with the third drive pole, presses the driving disk and is connected with the slip drive pipe.
Further, still including top massage mechanism, top massage mechanism includes: be equipped with the third sliding sleeve in the middle of first connecting pipe inner wall upper portion, slidingtype is equipped with sliding connection pole in the middle of the third sliding sleeve lower part, the sliding connection pole upside is around having the sixth spring, the sixth spring both ends are connected with third sliding sleeve and sliding connection pole respectively, sliding connection pole lower part rotary type is equipped with the swivelling joint pole, swivelling joint pole and head rod sliding connection, swivelling joint pole and second connecting pipe sliding connection, head pipe inner wall upper portion rotary type is equipped with the rotation connecting rod, the rotation connecting rod downside is equipped with intermittent gear, be connected with the second transmission subassembly between rotation connecting rod and the motor output shaft, the swivelling joint pole upside is equipped with the second straight-teeth gear.
Further, the sliding massage rod is used to massage the head of the patient.
Further, the bottom end of the rotating connecting rod is provided with a fiber protective sleeve, so that the head of the patient is prevented from being stabbed by the rotating connecting rod.
The invention provides a head massage physical therapy device for a psychiatric department, which has the following beneficial effects:
1. according to the invention, after the sliding clamping rod moves inwards to separate from the first driving rod, the clamping state of the sliding clamping rod on the first driving rod is released, so that the working steps of manually operating the sliding clamping rod by a user are saved, and the effect of releasing the clamping state of the first driving rod is realized;
2. when the sliding massage rod moves inwards to be in contact with the head of a patient, the sliding massage rod massages the head of the patient, so that the head of the patient is relieved, the head pain of the patient is reduced, and the effect of massaging the head of the patient by the sliding massage rod is realized;
3. according to the invention, after the first driving rod moves upwards to be contacted with the sliding clamping rod, the sliding clamping rod blocks the first driving rod to move upwards, so that the sliding clamping rod clamps the first driving rod, the step that a user manually presses the first sliding driving rod is reduced, and the effect that the sliding clamping rod clamps the first driving rod is realized;
4. when the intermittent gear has the tooth part to rotate to be in contact fit with the second straight gear, the second straight gear is driven to rotate, the second straight gear drives the rotary connecting rod to rotate, and the rotary connecting rod massages the head of the patient, so that the blood in the head of the patient is relieved, and the effect of relieving the blood in the head of the patient by the rotary connecting rod is realized.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a partial perspective view of the present invention.
Fig. 3 is a schematic perspective view of a first part of the pushing massage mechanism of the present invention.
Fig. 4 is a schematic perspective view of a second part of the pushing massage mechanism of the present invention.
Fig. 5 is a schematic perspective view of a first part of the driving mechanism of the present invention.
Fig. 6 is a schematic perspective view of a second part of the driving mechanism of the present invention.
Fig. 7 is a schematic perspective view of the slide pressing mechanism of the present invention.
Fig. 8 is a perspective view of a first portion of the locking mechanism of the present invention.
Fig. 9 is a perspective view of a second portion of the locking mechanism of the present invention.
Fig. 10 is a perspective view of a first part of the automatic intermittent unlocking mechanism of the invention.
Fig. 11 is a perspective view of a second part of the automatic intermittent unlocking mechanism of the invention.
Fig. 12 is a perspective view of a first part of the time switch mechanism of the present invention.
Fig. 13 is a perspective view of a second part of the time switch mechanism of the present invention.
Fig. 14 is a perspective view of a first portion of the top massage mechanism of the present invention.
Fig. 15 is a perspective view of a second portion of the top massage mechanism of the present invention.
Fig. 16 is a perspective view of a third portion of the top massage mechanism of the present invention.
In the above drawings: 1: first connecting pipe, 2: push massage mechanism, 21: second connection pipe, 22: sliding massage rod, 23: first spring, 3: drive mechanism, 301: rotary connecting ring, 31: rotary connecting pipe, 302: first runner, 32: first slide drive lever, 33: seventh spring, 34: motor, 35: first transmission assembly, 4: slide pressing mechanism, 41: first connecting rod, 42: slide drive tube, 43: second spring, 5: locking mechanism, 51: first driving lever, 52: second sliding sleeve, 53: slide detent lever, 54: third spring, 6: automatic intermittent unlocking mechanism, 61: rotation missing gear, 62: rotating the fixing rod, 63: first straight gear, 64: rotating the driving rod, 65: second connecting rod, 66: second slide drive lever, 67: fourth spring, 7: time switch mechanism, 71: third connecting rod, 72: third driving lever, 73: fifth spring, 74: pressing driving disc, 8: top massage mechanism, 81: third runner, 82: slide connecting rod, 83: sixth spring, 84: rotating connecting rod, 85: rotating connecting rod, 86: intermittent gear, 87: second transmission assembly, 88: a second spur gear.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to fig. 16, the present invention provides a technical solution: a head massage physical therapy device for psychiatric department comprises a first connecting pipe 1, a push massage mechanism 2 and a driving mechanism 3, wherein the driving mechanism 3 is arranged inside the first connecting pipe 1, and the push massage mechanism 2 is arranged on the lower side inside the first connecting pipe 1.
Promote massage mechanism 2 including second connecting pipe 21, slip massage pole 22 and first spring 23, the welding of 1 inside downside of first connecting pipe has second connecting pipe 21, and second connecting pipe 21 outside upper portion slidingtype is equipped with many slip massage poles 22 that are used for massaging patient's head, and many slip massage poles 22 outsides are all around having first spring 23, and first spring 23 both ends are connected with second connecting pipe 21 and slip massage pole 22 respectively.
The driving mechanism 3 comprises a rotary connecting ring 301, a rotary connecting pipe 31, a first sliding sleeve 302, a first sliding driving rod 32, a seventh spring 33, a motor 34 and a first driving assembly 35, the rotary connecting ring 301 is welded at the lower side inside the first connecting pipe 1, the rotary connecting pipe 31 is rotatably arranged at the top of the rotary connecting ring 301, a plurality of first sliding sleeves 302 are fixedly arranged at the lower side inside the rotary connecting pipe 31, the first sliding driving rod 32 is arranged at the middle part of each first sliding sleeve 302 in a sliding manner, the first sliding driving rod 32 is matched with the sliding massage rod 22, the seventh spring 33 is wound on each first sliding driving rod 32, two ends of the seventh spring 33 are respectively connected with the first sliding sleeve 302 and the first sliding driving rod 32, the motor 34 is fixedly arranged at the upper part of the rear side of the inner wall of the first connecting pipe 1 through bolts, the lower part of the front side of the motor 34 is provided with a switch, the first driving assembly 35 is connected between the lower side of the output shaft of the motor 34 and the upper part of the rotary connecting pipe 31, the first transmission assembly 35 is composed of two belt pulleys provided at the lower side of the output shaft of the motor 34 and the upper portion of the rotary connection pipe 31 and a belt wound between the two belt pulleys.
The device is characterized by further comprising a sliding pushing mechanism 4, wherein the sliding pushing mechanism 4 comprises a first connecting rod 41, a sliding driving pipe 42 and a second spring 43, the first connecting rod 41 is welded in the middle of the top of the second connecting pipe 21, the sliding driving pipe 42 is arranged on the lower side of the first connecting rod 41 in a sliding mode, the sliding driving pipe 42 is matched with the first sliding driving rod 32, the second spring 43 is wound on the upper side of the first connecting rod 41, and two ends of the second spring 43 are respectively connected with the first connecting rod 41 and the sliding driving pipe 42.
The locking mechanism 5 comprises a first driving rod 51, a second sliding sleeve 52, sliding clamping rods 53 and third springs 54, the first driving rod 51 is fixedly arranged on the left side and the right side of the top of the sliding driving tube 42, the second sliding sleeve 52 is welded on the left side and the right side of the upper portion of the first connecting rod 41, the sliding clamping rods 53 are arranged on the lower sides of the two second sliding sleeves 52 in a sliding mode, the sliding clamping rods 53 are matched with the first driving rod 51, the third springs 54 are wound on the inner sides of the two sliding clamping rods 53, and two ends of each third spring 54 are respectively connected with the second sliding sleeves 52 and the sliding clamping rods 53.
The automatic intermittent unlocking mechanism 6 comprises an automatic intermittent unlocking mechanism 6, wherein the automatic intermittent unlocking mechanism 6 comprises a rotary lacking gear 61, a rotary fixing rod 62, a first straight gear 63, a rotary driving rod 64, a second connecting rod 65, a second sliding driving rod 66 and a fourth spring 67, the rotary lacking gear 61 is arranged on the upper side inside the rotary connecting pipe 31, the rotary fixing rod 62 is welded on the upper portion of the rear side of the first connecting rod 41, the rotary driving rod 64 is arranged on the rear side of the rotary fixing rod 62 in a rotary mode, the first straight gear 63 is arranged on the upper side of the rotary driving rod 64, the first straight gear 63 is matched with the rotary lacking gear 61, the second connecting rod 65 is fixedly arranged on the lower portion of the front side of the rotary fixing rod 62, the second sliding driving rod 66 is arranged on the rear side of the second connecting rod 65 in a rotary mode, the second sliding driving rod 66 is matched with the rotary driving rod 64, the second sliding driving rod 66 is matched with the sliding clamping rod 53, the fourth spring 67 is wound on the front side of the second connecting rod 65, both ends of the fourth spring 67 are connected with the second connecting rod 65 and the second sliding driving rod 66, respectively.
The timing switch mechanism 7 is characterized by further comprising a timing switch mechanism 7, the timing switch mechanism 7 comprises a third connecting rod 71, a third driving rod 72, a fifth spring 73 and a pressing driving disk 74, the third connecting rod 71 is welded on the right side of the upper portion of the inner wall of the first connecting pipe 1, the third driving rod 72 is slidably arranged on the third connecting rod 71, the third driving rod 72 is matched with the motor 34 in a switch mode, the fifth spring 73 is wound on the lower side of the third connecting rod 71, two ends of the fifth spring 73 are respectively connected with the third connecting rod 71 and the third driving rod 72, the pressing driving disk 74 is slidably arranged in the middle of the upper portion of the first connecting pipe 1, the pressing driving disk 74 is connected with the third driving rod 72, and the pressing driving disk 74 is connected with the sliding driving pipe 42.
The top massage mechanism 8 further comprises a top massage mechanism 8, the top massage mechanism 8 comprises a third sliding sleeve 81, a sliding connecting rod 82, a sixth spring 83, a rotating connecting rod 84, a rotating connecting rod 85, an intermittent gear 86, a second transmission assembly 87 and a second straight gear 88, the third sliding sleeve 81 is welded in the middle of the upper portion of the inner wall of the first connecting pipe 1, the sliding connecting rod 82 is slidably arranged in the middle of the lower portion of the third sliding sleeve 81, the rotating connecting rod 84 is rotatably arranged at the lower portion of the sliding connecting rod 82, the rotating connecting rod 84 is slidably connected with the first connecting rod 41, the rotating connecting rod 84 is slidably connected with the second connecting pipe 21, the sixth spring 83 winds the upper side of the sliding connecting rod 82, two ends of the sixth spring 83 are respectively connected with the third sliding sleeve 81 and the sliding connecting rod 82, the rotating connecting rod 85 is rotatably arranged at the rear side of the upper portion of the inner wall of the first connecting pipe 1, the rotating connecting rod 85 is positioned at the front side of the motor 34, the intermittent gear 86 is fixedly arranged at the lower side of the rotating connecting rod 85, a second transmission assembly 87 is connected between the lower side of the rotating connecting rod 85 and the lower side of the output shaft of the motor 34, the second transmission assembly 87 is positioned on the upper side of the intermittent gear 86, the second transmission assembly 87 comprises two belt pulleys and a belt, the two belt pulleys are respectively arranged on the lower side of the rotating connecting rod 85 and the lower side of the output shaft of the motor 34, the belt is wound between the two belt pulleys, a second straight gear 88 is arranged on the upper side of the rotating connecting rod 84, and the second straight gear 88 is matched with the intermittent gear 86.
The sliding massage rod 22 is used to massage the head of the patient.
The bottom end of the rotating connecting rod 84 is provided with a fiber protective sleeve to prevent the rotating connecting rod 84 from stabbing the head of the patient.
The invention has the working principle that when people want to massage the head of a patient, the head massage physiotherapy device for the psychiatric department can be used, firstly, a user places a first connecting pipe 1 on the head of the patient to enable a push massage mechanism 2 to be contacted with the head of the patient, then the user starts a driving mechanism 3 to enable the driving mechanism 3 to rotate, the driving mechanism 3 rotates to be contacted and matched with the push massage mechanism 2, so as to drive the push massage mechanism 2 to move inwards, after the push massage mechanism 2 moves inwards to be contacted with the head of the patient, the push massage mechanism 2 is used for massaging the head of the patient, the head of the patient is relieved, so as to reduce the pain on the head of the patient, after the driving mechanism 3 rotates to be separated from the push massage mechanism 2, the push massage mechanism 2 moves outwards, the actions are repeated, and the push massage mechanism 2 can massage the head of the patient for a plurality of times, the user closes the driving mechanism 3, and the above operation is stopped.
When the driving mechanism 3 rotates, the driving mechanism 3 rotates to be in contact fit with the sliding massage rod 22, so that the sliding massage rod 22 is driven to move towards the inner side, the first spring 23 is compressed, after the sliding massage rod 22 moves towards the inner side to be in contact with the head of a patient, the sliding massage rod 22 massages the head of the patient, the head of the patient is relieved, so that pain on the head of the patient is reduced, after the driving mechanism 3 rotates to be separated from the sliding massage rod 22, the first spring 23 resets, so that the sliding massage rod 22 is driven to move towards the outer side to be recovered, the actions are repeated, the head of the patient can be massaged for multiple times, and when the driving mechanism 3 stops rotating, the actions stop.
The user pushes the first sliding driving rod 32 downwards, the seventh spring 33 is stretched, the first sliding driving rod 32 moves downwards to contact with the sliding massage rod 22, the user controls the first sliding driving rod 32 to stop, then the user starts the motor 34, the output shaft of the motor 34 drives the first transmission component 35 and the rotary connecting pipe 31 to rotate, the rotary connecting pipe 31 drives the first sliding sleeve 302, the first sliding driving rod 32 and the seventh spring 33 to rotate, the first sliding driving rod 32 rotates to contact and match with the sliding massage rod 22, so as to drive the sliding massage rod 22 to move inwards, the first spring 23 is compressed, the sliding massage rod 22 moves inwards to contact with the head of the patient, the sliding massage rod 22 massages the head of the patient, so that the head of the patient is relieved, the head pain of the patient is reduced, and the step of massaging the head of the patient with the hand of the user is reduced, after the first sliding driving rod 32 is rotated to be separated from the sliding massage rod 22, the first spring 23 is reset, so that the sliding massage rod 22 is driven to move outwards to a recovery position, the actions are repeated, the head of a patient can be massaged for multiple times, after the head of the patient is massaged, a user loosens the first sliding driving rod 32, the seventh spring 33 is reset, so that the first sliding driving rod 32 is driven to move upwards to the recovery position, the first sliding driving rod 32 is separated from the sliding massage rod 22, the motor 34 is turned off by the user, and the actions are stopped.
When the head of a patient needs to be massaged, the user pushes the sliding driving pipe 42 downwards, the second spring 43 is stretched, the sliding driving pipe 42 moves downwards to be in contact with and matched with the first sliding driving rod 32, so as to drive the first sliding driving rod 32 to move downwards, the seventh spring 33 is stretched, so that the first sliding driving rod 32 moves downwards to be in contact with the sliding massage rod 22, when the rotating connecting pipe 31 rotates, the rotating connecting pipe 31 drives the first sliding sleeve 302, the first sliding driving rod 32 and the seventh spring 33 to rotate, the first sliding driving rod 32 rotates to be in contact and matched with the sliding massage rod 22, so as to drive the sliding massage rod 22 to move inwards, the first spring 23 is compressed, after the sliding massage rod 22 moves inwards to be in contact with the head of the patient, the sliding massage rod 22 massages the head of the patient, after the head of the patient is massaged, when the rotating connecting pipe 31 stops rotating, the first sliding actuation lever 32 is then stopped, and the user then releases the sliding actuation lever 42, the second spring 43 is reset, thereby moving the sliding actuation lever 42 upward, and after the sliding actuation lever 42 is moved upward to disengage the first sliding actuation lever 32, the seventh spring 33 is reset, thereby moving the first sliding actuation lever 32 upward to disengage the sliding massage lever 22.
When the sliding driving tube 42 moves downwards, the sliding driving tube 42 drives the first driving rod 51 to move downwards, the first driving rod 51 moves downwards to be in contact fit with the sliding clamping rod 53, so as to drive the sliding clamping rod 53 to move inwards, the third spring 54 is stretched, after the first driving rod 51 moves downwards to be separated from the sliding clamping rod 53, the third spring 54 is reset, so as to drive the sliding clamping rod 53 to move outwards to a recovery position, when the sliding driving tube 42 moves upwards, the sliding driving tube 42 drives the first driving rod 51 to move upwards, after the first driving rod 51 moves upwards to be in contact with the sliding clamping rod 53, the sliding clamping rod 53 blocks the first driving rod 51 to move upwards, so that the sliding clamping rod 53 clamps the first driving rod 51, the step that a user manually presses the first sliding driving rod 32 is reduced, after the head of a patient is massaged, the user pushes the sliding clamping rod 53 inwards, after the third spring 54 is stretched and the sliding position-locking rod 53 moves inwards to separate from the first driving rod 51, the sliding driving tube 42 continues to move upwards, the sliding driving tube 42 drives the first driving rod 51 to move upwards, and after the first driving rod 51 moves upwards to separate from the sliding position-locking rod 53, the user releases the sliding position-locking rod 53, and the third spring 54 resets, so that the sliding position-locking rod 53 is driven to move outwards to the recovery position.
After the sliding clamping rod 53 clamps the first driving rod 51, when the rotating connecting pipe 31 rotates, the rotating connecting pipe 31 drives the rotating gear 61 to rotate, the toothed part of the rotating gear 61 rotates to be in contact fit with the first straight gear 63, so as to drive the first straight gear 63 and the rotating driving rod 64 to rotate, the convex part of the rotating driving rod 64 rotates to be in contact fit with the second sliding driving rod 66, so as to drive the second sliding driving rod 66 to move forward, the fourth spring 67 is compressed, the second sliding driving rod 66 moves forward to be in contact fit with the sliding clamping rod 53, so as to drive the sliding clamping rod 53 to move inward, after the sliding clamping rod 53 moves inward to be separated from the first driving rod 51, so as to release the clamping state of the sliding clamping rod 53 on the first driving rod 51, so that the working step of manually operating the sliding clamping rod 53 by a user is saved, after the convex part of the rotating driving rod 64 rotates to be separated from the first straight gear 63, the second sliding driving rod 66, the fourth spring 67 is reset to drive the second sliding driving rod 66 to move backward to the recovery position, so that the second sliding driving rod 66 is far away from the sliding position-locking rod 53, and when the rotary connecting pipe 31 stops rotating, the above action is stopped.
After the second connection tube 21 is placed on the head of the patient, the user pushes the pressing driving disk 74 downwards, the pressing driving disk 74 drives the third driving rod 72 and the sliding driving tube 42 to move downwards, the fifth spring 73 is compressed, the third driving rod 72 moves downwards to be in switch contact with the motor 34, so that the motor 34 is started, the sliding massage rod 22 massages the head of the patient, when the sliding driving tube 42 moves upwards, the sliding driving tube 42 drives the pressing driving disk 74 and the third driving rod 72 to move upwards, the fifth spring 73 is reset, the third driving rod 72 moves upwards to be in switch contact with the motor 34, so that the motor 34 is turned off, the sliding massage rod 22 stops massaging the head of the patient, and the function of automatically starting and turning off the motor 34 is achieved.
The user puts the second connection tube 21 on the head of the patient, the rotation connection rod 84 contacts with the head of the patient, if the head of the patient is bigger, thereby driving the rotation connection rod 84, the second spur gear 88 and the sliding connection rod 82 move upwards, the sixth spring 83 is stretched, thereby providing a comfortable treatment environment for the patient, when the output shaft of the motor 34 rotates, the output shaft of the motor 34 drives the second transmission assembly 87, the rotation connection rod 85 and the intermittent gear 86 rotate, the toothed part of the intermittent gear 86 rotates to be in contact fit with the second spur gear 88, thereby driving the second spur gear 88 to rotate, the second spur gear 88 drives the rotation connection rod 84 to rotate, the rotation connection rod 84 massages the head of the patient, thereby relieving the blood in the head of the patient, after the toothed part of the intermittent gear 86 rotates to be separated from the second spur gear 88, so that the second spur gear 88 stops rotating, after the massage of the patient is completed, when the output shaft of the motor 34 stops rotating, the intermittent gear 86 stops rotating along with the output shaft, and after the head of the patient is separated from the rotating connecting rod 84, the sixth spring 83 is reset, so that the sliding connecting rod 82, the rotating connecting rod 84 and the second spur gear 88 are driven to move downwards to the reset position.
It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.