JPH04331397A - Water proof device of external connection for electronic equipment - Google Patents

Abstract

PURPOSE:To improve water tightness by fixing with screw the connecting part between an external connection terminal and an inner module of an antenna or the like and attaching a connector at the connecting part with a provision of tightening margin of a packing. CONSTITUTION:On a terminal projected outside from a band body 2 of plate type connection terminal 3 such as an antenna plate and the like inserted inside of the ban 2 made of an electric insulation material such as synthetic rubber, a plurality of holes are constituted. It is fixed at least at one hole with screw directly on a case 1 or indirectly through a reinforcing plate and an insulation fixing plate 4. A through hole is provide at the band connection part of the case 1 and a connector 5 made of an electric insulator material is placed together with a connector packing 6 made of synthetic rubber or synthetic resin with the provision of tightening margin in the diametral direction. The terminal tip 3a of the plate type connecting terminal 3 is contacted elastically with a connector 5.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a wristwatch-type pager, a portable electronic device with a built-in receiver such as a radio, a television, etc., in which the antenna, battery, external power generating device, etc. are inserted into the band and are removably attached and fixed to the case. The configuration is waterproof,
The present invention relates to a waterproofing device for external connections of portable electronic devices such as wristwatches, which reliably creates quality and performance such as fixing strength and durability, and which can be mass-produced and manufactured at low cost.

0002

[Prior Art] In conventional antenna connection devices for electronic devices such as wristwatches with built-in receivers, and devices for connecting batteries built into bands to the inside of cases, Molded and installed configuration,
■There are structures in which lead wires are introduced into the case through an insulator and permanently fixed by soldering, but they are reliable in terms of quality and performance such as waterproof performance, fixing strength, and durability, and are excellent in mass production. However, there was no structure that could be manufactured in large quantities at low cost.

0003

[Problems to be solved by the invention] The present invention provides quality and performance such as reliable waterproofness, fixing strength, and durability that could not be obtained with conventional techniques, and also has excellent mass productivity and can be manufactured at low cost. The purpose of this invention is to solve the following problems in the prior art. ■The connection between the external connection terminal such as the antenna and the internal module is not waterproof. ■Since the connecting parts between external connection terminals such as antennas and internal modules are made of copper or copper-based alloy + plating, they have poor corrosion resistance when sweat, seawater, etc. adhere to them. ■ Mechanical strength as a wristwatch band, especially tensile stress, torsional stress, and bending stress, is weak and lacks durability. ■The connection part for external devices is not configured to be easily attached or detached, and the band cannot be easily replaced. ■Lack of mass production and cannot be manufactured at low cost.

0004

[Means for Solving the Problems] The external connection part waterproofing device for a portable electronic device such as a wristwatch according to the present invention has a structure in which a plate-shaped connection terminal such as an antenna plate is inserted into a band made of an electrically insulating material such as synthetic rubber. The terminal part that protrudes from the band body has multiple holes, and at least one hole allows screws to be fixed to the case directly or indirectly via a fixing reinforcing plate or an insulating fixing plate, and the band of the case A through hole is provided in the connecting portion, a connector made of an electrically conductive material is attached to the through hole portion of the case with a connector packing made of synthetic rubber or synthetic resin provided with a tightening margin in the radial direction, and the terminal portion of the plate-shaped connecting terminal is By bringing the tip into elastic contact with the connector, all of the problems mentioned in the previous section are solved.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be explained in detail with reference to the drawings.

In FIG. 1, 1 is a case made of reinforced plastic such as polycarbonate resin containing glass fibers, and a cover glass 7 made of inorganic glass is pressed and fixed in a watertight manner on the front side through a waterproof gasket 9 made of synthetic resin. has been done. Also, on the back side, a back cover 8 made of stainless steel is inserted through a back cover packing 10 made of synthetic rubber.
is configured to be removable from the case by fixing screws at four locations.

Reference numeral 11 denotes a receiver or internal module for a pager, radio, television, etc. installed inside the case.
Reference numeral 12 denotes a leaf spring-like contact that makes elastic contact with the connector 5. The band body 2 is made of synthetic rubber such as polyurethane rubber or silicone rubber, and an antenna plate 3 made of a stainless steel material such as SUS304, which has low high frequency resistance and good corrosion resistance, is insert-molded inside so that it can be bent. It is integrated. The plate-shaped connection terminal 3 such as an antenna plate is formed with a thickness of 0.05 to 0.2 mm and a width of 10 to 17 mm, and the end is partially bent to make elastic contact with the connector 5 made of stainless steel material. A spring portion 3a is formed. A packing mounting groove 5a is formed in the part of the connector 5 that is fitted into the through hole of the case 1, and a connector packing 6 made of synthetic rubber is fitted with a radial interference between the connector packing 6 and the case 1. .

FIG. 2 is a cross-sectional view of the part where the band body 2 is removably attached to the case 1 and fixed with high quality.
A plate-shaped connection terminal 3 such as an antenna plate that is insert-molded inside the band has a plurality of holes in the terminal part that protrudes from the band body, and is fixed to the case 1 by self-tapping into the engagement hole 1a of the case 1. Firmly with the band fixing screw 14 of the formula,
and is removably fixed.

Reference numeral 4 denotes a band fixing plate made of stainless steel for firmly fixing the plate-shaped connection terminal 3 such as a thin plate-shaped antenna plate to the case 1. A hole for fixing screws to the case 1, and a protrusion 1b that partially forms a bar-shaped protrusion from the case 1 made of synthetic resin.
Used as a hole to engage with.

As shown in the plan view of FIG. 3, the band fixing screws 14 are provided at two locations on each side at the outer ends of both sides of the connector 5, and are arranged symmetrically on both the 12 o'clock side and the 6 o'clock side. has been done. The positions of the protruding portion 1b of the case 1 and the corresponding hole of the plate-like connection terminal and hole of the band fixing plate are not in a straight line, but are distributed in two rows, and consideration has been given to strength so that tensile stress, bending stress, etc. do not concentrate. are doing. With this configuration, a strength of 15 to 30 kg was obtained in a tensile test, and it was confirmed that the strength was sufficient for a built-in band such as a wristwatch type antenna.

[0011] In manufacturing the band having the above configuration, a plate-shaped connection terminal such as an antenna plate is set in a mold, and a LIM
By molding (liquid reaction injection molding), polyurethane rubber,
The band body 2 is completed by inserting synthetic rubber such as silicone rubber by injection molding.

FIG. 4 shows a configuration in which electrical insulation properties are taken into account when the case 21 is made of metal. Packing mounting groove 25
A is formed wide, and a connector packing 26 having a flange portion 26a having an L-shaped cross section on one side is attached thereto,
The radial tightening margin ensures waterproofness, the flange portion 26a insulates the flange portion 25b of the connector 25 from contacting the case 21 and causing a short circuit, and holds the connector 25 from entering inside due to external pressure. are doing. The connector packing 26 may be made of synthetic rubber such as NBR or IIR, or a soft synthetic resin such as fluororesin.

In the above configuration, the conductors of the parts as external connection terminals are all based on stainless steel material with emphasis on corrosion resistance to protect the portable electronic device from sweat, seawater, etc. The electrical characteristics are improved by applying gold plating of about 5 to 5 μm. This gold plating is the lowest,
It is most effective if it is configured in the area where the connector and the plate-like connection terminal come into contact.

[0014] With the above configuration, in the case of a wristwatch type receiver, the bands with built-in antenna plates are connected to the 12 o'clock side and the 6 o'clock side with separate clasps, thereby functioning as a loop antenna and receiving signals. This increases efficiency. Even when a battery or the like is inserted into the band and electrically connected to the inside of the case, it can be widely applied as an external connection device for portable electronic devices that minimizes electrical resistance loss and has excellent corrosion resistance and durability.

[0015]

[Effects of the Invention] With the above-described structure, the present invention has the following effects. ■Waterproof performance has been significantly improved, with the conventional configuration having a water resistance level of less than 2 atm, but improved to an enhanced waterproof level of 5 to 10 atm, greatly expanding the range of uses for portable electronic devices such as wristwatches. . ■Since the connection terminals and connectors of the antenna plate, etc. are made of SUS material, which is a highly corrosion-resistant alloy, the conventional structure of copper alloy + plating used as the contact material may cause sweat or seawater to adhere to it. Problems such as corrosion and stains on shirts have been improved, and corrosion has no longer occurred even after long-term use, solving a major quality problem in the market. ■The connection between the case and band has been created to have high mechanical strength such as tensile strength, torsional strength, and bending strength, which is necessary for portable electronic devices such as wristwatches. ■It has a small number of structural parts and can be manufactured at low cost, and the case, band, and connecting terminal parts can all be injection molded, continuous processed, and automated, making it particularly suitable for mass production. ■The band can be attached and detached from the case using elastic contacts, and the screw-fixed structure makes it extremely easy to assemble and disassemble. ■Since the connector is installed inside the case, the waterproofness of the case is guaranteed, quality control is easy, and production management without a band is easy. ■There is a high degree of freedom in terms of design and appearance, and since the band fixing part uses screws to fix the band to the case, there is no gap between the case and the band, creating a sense of unity. It has great practical effects, such as being able to create a new appearance.

[Brief explanation of the drawing]

FIG. 1 is a partial longitudinal cross-sectional view showing a connecting portion of an embodiment of the present invention.

FIG. 2 is a partial vertical cross-sectional view showing a fixing part of an embodiment of the present invention.

FIG. 3 is a plan view showing a connecting portion and a fixing portion of an embodiment of the present invention.

FIG. 4 is a partial vertical cross-sectional view showing a connecting portion of another embodiment of the present invention.

[Explanation of symbols]

1, 21 case 2, 22 Band body 3, 23 Plate connection terminal 5, 25 Connector 6, 26 Connector packing 14 Band fixing screw

Claims (3)

[Claims] Claim 1: A terminal portion of a plate-shaped connection terminal such as an antenna plate inserted into a band made of an electrically insulating material such as synthetic rubber, which projects outward from the band body, is provided with a plurality of holes; Screws are fixed to the case directly or indirectly through a fixing reinforcing plate or an insulating fixing plate at the hole, and a through hole is provided at the band connection part of the case, and a connector made of an electrical conductor is integrated into the case through hole. Waterproofing of an external connection part of an electronic device, characterized in that a connector packing made of rubber or synthetic resin is installed with a tightening margin in the radial direction, and the terminal end of the plate-shaped connection terminal is brought into elastic contact with the connector. Device. 2. The waterproofing device for an external connection part of an electronic device according to claim 1, wherein a highly corrosion-resistant alloy such as stainless steel is used for the plate-shaped connection terminal such as an antenna plate and the connector. Claim 3: Claim 2, characterized in that the surface of the plate-shaped connection terminal such as an antenna plate and the connector are plated with gold.
A waterproofing device for external connections of electronic equipment as described in .