JP2894346B1 - Waterproof mechanism for electronic devices - Google Patents

Abstract

An object of the present invention is to realize an excellent waterproof function with a simple structure without using an expensive waterproof member, and to facilitate assembly and maintenance and inspection. SOLUTION: The disclosed waterproof mechanism of an electronic device has contact pin covers 4a and 4b of a plug 4 fitted therein and supports the contacts 6 and 7 inserted into through holes 1a communicating with the inside thereof. At the same time, when the contact support member 8 having the positioning holes 8a formed in the vertical direction is fixed to the surface of the printed circuit board 3 and the ribs 2a formed on the peripheral edge are fitted into the grooves 1e, the positioning holes 8a are The upper case 2 is fitted with a positioning taper 2b integrally formed with a pressing taper portion 22b formed at one of the bases for pressing the contact support member 8 against the inner side surface of the socket 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof mechanism for electronic equipment, and more particularly to a waterproof mechanism for electronic equipment suitable for use in medical electronic equipment.

[0002]

2. Description of the Related Art Medical electronic devices used for observing electrical phenomena occurring in the human body, such as electrocardiograms, and for observing affected parts of the human body, such as endoscopes, include doctors and nurses. Liquids such as medicines and body fluids of a patient may be erroneously sprinkled on the main body of the apparatus or may enter the inside of a probe that comes into contact with the affected part of the patient due to the medical action and the movement / action of the patient as the subject. Therefore, usually, a medical electronic device is provided with a mechanism for waterproofing or drip-proofing, particularly at an input / output unit through which signals are input / output.

[0003] As a waterproof mechanism of this kind of electronic equipment, there has been the following one. First, as a waterproof mechanism on the probe side, for example, there is one disclosed in Japanese Utility Model Laid-Open Publication No. Sho 61-168802 (hereinafter referred to as a first conventional example). That is, the case in which the sensor such as the ultrasonic vibrator is stored is provided with a circular hole at the outlet of the cable electrically connected to the device body, and is formed at the inner peripheral end of the circular hole. An engaging portion formed of an elastic body and engaging with the inclined surface of the circular hole portion was formed at an end portion, and a sleeve externally fitted to the cable was formed on an outer peripheral portion of the circular hole portion. The inside of the case is sealed by the circular hole and the sleeve when pressed by the pressing means screwed into the screw portion.

On the other hand, as a waterproof mechanism on the device body side, there is, for example, one disclosed in Japanese Utility Model Laid-Open Publication No. 2-4512 (hereinafter referred to as a second conventional example). That is, the through hole formed in the side wall of the device main body has a through hole in the center, and a waterproof member that is deformable in the radial direction is attached to the through hole, and the inside of the device main body faces the insertion hole. A connector receiver is provided. Then, the connector provided at the other end of the cable having one end connected to the endoscope is inserted into the through hole of the waterproof member, and the insertion portion of the connector is inserted into the connector receiver and connected, so that the waterproof member is connected to the connector. And the space between the connector and the connector receiver is sealed.

[0005]

By the way, the above-mentioned conventional waterproof mechanism for electronic equipment has the following drawbacks. First, in the first conventional example, depending on the material of the sleeve, the elasticity may be lost due to aging, and the engagement between the thread formed on the outer periphery of the circular hole and the pressing means may become loose. Therefore, there is a possibility that the sealing may be incomplete due to these. Further, since the cable is merely fixed to the case by the engagement and the pressing of the engaging portion of the sleeve externally fitted to the inclined surface of the circular hole of the case by the pressing means, the doctor or the like is required. If the operator accidentally pulls the cable, the sleeve may be broken, in which case the seal may be incomplete. Therefore, it is necessary to use a sleeve that does not deteriorate in elasticity due to aging and has excellent strength, but there is a problem in that the sleeve is expensive. Furthermore, in the first conventional example, the case must be disassembled when performing maintenance and inspection, for example, when checking a cable break or the like or when replacing parts such as an ultrasonic vibrator. Hangs,
The disassembly and assembly for maintenance and inspection may rather cause a failure.

In the second conventional example, even when the central axis of the through hole of the waterproof member does not coincide with the central axis of the connector receiver, the waterproof member is deformed in the radial direction of the through hole. The member remains tightly attached to the outer periphery of the connector,
No liquid or patient's bodily fluid will enter the interior of the device. However, if you leave the connector attached,
Since the waterproof member continues to be deformed by the displacement of the above two central axes, the strength of the deformed portion of the waterproof member is weakened with the passage of time, so that the waterproof member is easily damaged and the seal is incomplete. There is fear. Therefore, it is necessary to use a material that does not deteriorate in elasticity due to aging and has excellent strength as a waterproof member, but there is a problem that the cost is high. Further, in the second conventional example, when the connector is not mounted, there is a possibility that liquid or the like may enter the inside of the device through the through hole of the waterproof member, and if the liquid or the like adheres to the tip of the connector. However, there is a possibility that liquid or the like may enter the inside of the device even when the connector is inserted through the through hole of the waterproof member.

The present invention has been made in view of the above circumstances, and provides an excellent waterproof function with a simple structure without using expensive waterproof members, and furthermore, an electronic device which is easy to maintain and inspect. It aims to provide a waterproof mechanism.

[0008]

According to a first aspect of the present invention, there is provided a waterproof mechanism for an electronic device, comprising:
A concave portion or a convex portion is formed on each peripheral portion, and first and second cases for sealing the inside by fitting a convex portion formed on the other to a concave portion formed on one side, and various components are mounted, The present invention relates to a waterproof mechanism of an electronic device including a printed circuit board having a predetermined electrical function, and a plug provided with a plurality of pins for inputting and outputting signals to and from the outside on one side surface of the first case. And a socket formed with a plurality of through-holes communicating with the plurality of pins and communicating with the inside thereof is formed integrally with the first case, and is provided on a surface near one end of the printed circuit board. Each end is electrically connected to a corresponding pattern formed on the printed circuit board, and the other end is connected to the socket when the printed circuit board is stored in a predetermined position of the first case. Above from the corresponding through hole A plurality of contacts inserted into the socket are supported, and when the printed circuit board is housed in a predetermined position of the first case, a direction perpendicular to a direction in which the plurality of through holes of the socket is formed. A contact support member having a hole formed therein is fixed, and the side surface of the contact support member facing the inner surface of the socket when the printed circuit board is stored in a predetermined position of the first case,
A contact waterproofing member made of an elastic body and formed with a plurality of holes to be fitted in the plurality of contacts is provided so as to penetrate the plurality of holes to the roots of the corresponding contacts, and is provided from one end of the second case. Inside the predetermined distance, the printed circuit board is housed at a predetermined position in the first case, and the other peripheral edge is formed in a concave portion formed in one peripheral portion of the first and second cases. When fitting the convex portion formed in the portion, it is fitted in the hole of the contact support member and the second
A pin is formed integrally with the second case, and a pin for pressing the contact support member against the inner side surface of the socket is formed at a tapered portion formed at one end of the case.

According to a second aspect of the present invention, there is provided a waterproof mechanism for an electronic device according to the first aspect, wherein the plurality of holes are formed on a surface of the contact waterproofing member which is in close contact with a side surface of the contact supporting member. A plurality of ring-shaped first protrusions inclined toward the center of the corresponding hole are formed integrally with the contact waterproofing member so as to surround the other surface of the contact waterproofing member. The plurality of first protrusions are concentric with each other,
A plurality of ring-shaped second protrusions having a diameter slightly larger than the diameter of the plurality of through holes of the socket and inclined toward the center of the corresponding hole are formed integrally with the contact waterproof member. It is characterized by having.

According to a third aspect of the present invention, there is provided the waterproof mechanism for an electronic device according to the first or second aspect, wherein the printed circuit board is mounted near a side surface of the first case facing the one side surface. And a support having a positioning projection formed therein for fitting into a positioning hole formed in the printed circuit board and being integrally formed with the first case.

According to a fourth aspect of the present invention, there is provided a waterproof mechanism for an electronic device according to the third aspect, wherein the printed circuit board is provided inside the second case at a predetermined distance from the other end of the second case. When the convex portion formed on the other peripheral portion is fitted into the concave portion formed on one peripheral portion of the first and second cases while being housed in a predetermined position of the first case, A board pressing pin for pressing the printed board against the column of the first case is formed integrally with the second case.

According to a fifth aspect of the present invention, there is provided a waterproof mechanism for an electronic device according to the fourth aspect, wherein the positioning projection is provided with:
The printed circuit board is formed so as to protrude from the surface of the printed circuit board when fitted into the positioning hole of the printed circuit board, and has a hole formed in the board pressing pin of the second case. In a state where the substrate is stored in a predetermined position of the first case, a convex portion formed on the other peripheral portion is fitted into a concave portion formed on one peripheral portion of the first and second cases. In this case, the positioning protrusion is fitted into a hole formed in the substrate pressing pin of the second case.

According to a sixth aspect of the present invention, there is provided a waterproof mechanism for an electronic device according to any one of the first to fifth aspects.
A guide for guiding the printed circuit board to be stored in a predetermined position of the first case is formed integrally with the first case on the inner side of the side facing the one side of the inner surface of the first case. It is characterized by being.

[0014]

According to the structure of the present invention, an excellent waterproof function is provided.
It can be realized with a simple structure without using an expensive waterproof member, and further, maintenance and inspection are easy.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. The description will be specifically made using an embodiment. FIG. 1 is a front sectional view showing a mechanical configuration of an electronic device to which a waterproof mechanism for an electronic device according to an embodiment of the present invention is applied, with an upper case 2 removed.
Is a partially enlarged front cross-sectional view of the electronic device, and FIG. 3 is a cross-sectional view of a contact waterproof member 9 constituting the electronic device. As shown in FIG. 1, the electronic device of this example has a lower case 1
, An upper case 2 and a printed circuit board 3. As shown in FIG. 1, a socket 1a is integrally formed on one side surface (hereinafter, referred to as a first side surface) of the lower case 1, and the socket 1a is connected to one end of a cable (not shown). Contact pin cover 4a of the plug 4
4b are formed with fitting holes 11a and 11b, and have an inner diameter smaller than the inner diameters of the fitting holes 11a and 11b, and as shown in FIG.
Through holes 12a, 12b connecting a and 11b to the inside of the device
Are formed. Contact pin cover 4 for plug 4
a and 4b are provided with metal contact pins (female) which cover the circumference of each horizontal portion of contacts 6 and 7 described later and are connected to a cable (not shown). When the pin covers 4a and 4b are fitted into the fitting holes 11a and 11b, the circumference of the horizontal portion of the contacts 6 and 7 and the contact pins come into mechanical and electrical contact with each other. A small current corresponding to the electrical phenomenon occurring in the human body is input into the electronic device through a probe (not shown), a cable (not shown), a plug 4 and contacts 6 and 7 that are in contact with the skin or the affected part of the patient. Is done.

A printed circuit board 3 is placed near the socket 1a on the inner surface of the lower case 1, and a support 1 for supporting the printed circuit board 3 is mounted.
b is formed integrally with the lower case 1. On the other hand, a side surface (hereinafter, referred to as a second side surface) facing the first side surface of the inner surface of the lower case 1.
The printed circuit board 3 is placed in the vicinity.
A support 1c having a positioning protrusion 11c to be fitted in a positioning hole 3a formed in the printed circuit board 3 is formed integrally with the lower case 1 to support the supporting case.
On the inner side of the second side surface of the lower case 1, the printed circuit board 3 is mounted on the columns 1b and 1c, and guides when the positioning holes 3a of the printed circuit board 3 are fitted into the positioning projections 11c of the column 1c. The guide 1d is formed integrally with the lower case 1. A groove 1e into which the case waterproof member 5 made of an elastic body is inserted is formed in a peripheral portion of the lower case 1.

Various components (not shown) are mounted on the printed circuit board 3, and the various components are electrically connected to each other by a pattern made of copper foil or the like formed on the back surface or both the back surface and the front surface and by soldering. . A contact support member 8 in which inverted L-shaped contacts 6 and 7 are integrally formed is fixed to a surface near one end of the printed circuit board 3. Contact 6,7
Each end of the vertical portion penetrates a hole formed in the printed circuit board 3 and protrudes to the back surface of the printed circuit board 3, is soldered to a land of the pattern formed on the back surface, and is electrically connected to the pattern. And is mechanically fixed to the printed circuit board 3. At substantially the center of the contact support member 8, a positioning hole 8a is formed in a vertical direction so as to avoid the contacts 6 and 7.

On one side surface of the contact support member 8, the horizontal portions of the contacts 6 and 7 project at a predetermined interval, and are made of an elastic material, and have a diameter slightly smaller than the diameter of the contacts 6 and 7. The contact waterproofing member 9 formed with 91a and 91b is in close contact with the holes 91a and 91b through the contacts 6 and 7. As shown in FIG. 3, corresponding surfaces of the contact waterproof member 9 are provided with corresponding holes 91a and 91b so as to surround the holes 91a and 91b.
a, a ring-shaped projection 9 inclined toward the center of 91b
2a and 92b are formed integrally with the contact waterproofing member main body. On the other hand, the other surface of the contact waterproofing member 9 (hereinafter referred to as a second surface)
Has a diameter which is concentric with the protrusions 92a, 92b and slightly larger than the diameter of the through holes 12a, 12b formed on the side surface of the socket 1a on the device body side.
Ring-shaped convex portions 93a, 93b inclined toward the centers of the corresponding holes 91a, 91b are formed integrally with the contact waterproof member main body. Then, the socket 1a, the contact 6,
The contact support member 8 and the contact waterproofing member 9 constitute the input / output unit 10 in a state where the electronic device is assembled. The socket 1a constitutes a mechanical function unit of the input / output unit 10, and the contacts 6, 7 and the contact support member 8 constitute an electric function unit of the input / output unit 10, and the mechanical function unit and the electric function unit And are completely separated.

A rib 2a for sealing the inside of the device is formed integrally with the upper case 2 at the periphery of the upper case 2 by being pressed and fitted into the groove 1e of the lower case 1 together with the case waterproofing member 5. ing. The printed circuit board 3 is fixed to a predetermined position of the lower case 1 inside the contact support member 8 at a predetermined distance from one end of the upper case 2.
The positioning pin 2b fitted into the positioning hole 8a is formed integrally with the upper case 2. At the tip of the positioning pin 2b, a guide taper portion 21b serving as a guide when fitting into the positioning hole 8a of the contact support member 8 is formed. When the positioning pin 2b is fitted into the positioning hole 8a of the contact support member 8 at the one end side of the upper case 2, the printed circuit board 3, the contacts 6, 7, and the contact support member 8 are connected in the figure. A pressing tapered portion 22b for pressing in the direction of the arrow is formed. On the other hand, the printed circuit board 3 is fixed to a predetermined position of the lower case 1 at an inner side at a predetermined distance from the other end of the upper case 2, that is, at a position corresponding to the column 1 c of the lower case 1. Then, the printed circuit board 3 is mounted on the support 1
A substrate pressing pin 2c that presses the upper case 2 is formed integrally with the upper case 2.

Next, a procedure for assembling the electronic device having the above configuration will be described. First, various components (not shown) for realizing an electrical function (for example, an electrocardiogram) of the electronic device are mounted on the printed circuit board 3.
Alternatively, a contact support member 8 in which contacts 6 and 7 are fitted is fixedly attached to a surface near one end of the contact support member 8 by solder and a pattern formed on both the back surface and the front surface. , 7 penetrate through the holes of the printed circuit board 3 and protrude from the back surface thereof, and are soldered to the lands of the pattern formed on the back surface and are electrically connected to the pattern. Also, on one side surface of the contact support member 8, a contact waterproof member 9 is inserted into the horizontal portions of the contacts 6 and 7, and is in close contact therewith.

The operator holds the printed circuit board 3 having the above-described configuration, and inserts the horizontal ends of the contacts 6 and 7 into the through holes 12a and 12b formed in the socket 1a from obliquely above while simultaneously inserting the printed circuit board 3 into the through holes 12a and 12b. 3, the upper surface of the column 1b slides toward the first side surface of the lower case 1,
The other end of the printed circuit board 3 is guided by a guide 1d formed inside the second side surface of the lower case 1 toward the first side surface of the lower case 1, as indicated by reference numeral 3 'in FIG. And slide the positioning hole 3a of the printed circuit board 3 into the support 1c.
To the positioning projection 11c. As a result, the printed circuit board 3 is placed on the columns 1b and 1c, the first surface of the contact waterproof member 9 is in close contact with the side surface of the contact support member 8, and the second surface of the contact waterproof member 9 is connected to the socket 1a. To the side of the device body.

In this state, since the first and second surfaces of the contact waterproof member 9 are not sufficiently pressed against the side surface of the contact support member 8 and the side surface of the socket 1a on the device main body side, the contact waterproof member 9 is in the socket. Although the space between the socket 1a and the contact support member 8 is not completely sealed, the socket 1a, the contacts 6, 7, the contact support member 8, and the contact waterproof member 9 function sufficiently as the input / output unit 10. That is, when the plug 4 is attached, the other end of the printed circuit board 3 contacts the guide 1d,
Since the guide 1d receives the force applied to the input / output unit 10 in the direction opposite to the arrow in the drawing due to the attachment of the plug 4, the function of the input / output unit 10 is not hindered. One side of the support member 8 is a contact waterproof member 9
Abuts the side surface of the socket 1a on the device body side via
Since the socket 1a receives the force applied to the input / output unit 10 in the direction of the arrow due to the removal of the plug 4, the function of the input / output unit 10 is not hindered. Therefore, at the time of assembling or maintenance of the electronic device, each part of the device can be inspected with the upper case 2 removed.

Then, the operator operates the groove 1e of the lower case 1.
With the case waterproof member 5 inserted therein, the tip of the positioning pin 2b of the upper case 2 is inserted into the positioning hole 8a of the contact support member 8, and the positioning pin 2b on the surface of the upper case 2 is inserted.
And the upper case 2
Of the lower case 1 is pushed in according to the groove 1e of the lower case 1. As a result, the positioning pins 2b of the upper case 2
The pressing taper 22b is guided by the guide taper 21b and enters below the positioning hole 8a of the contact support member 8, and a part of the pressing taper 22b is inserted into the positioning hole 8a of the contact supporting member 8, so that the pressing taper 22b is printed. Substrate 3, contact 6,
7. The contact support member 8 is pressed in the direction of the arrow in the figure. Therefore, the first and second surfaces of the contact waterproof member 9 are sufficiently pressed against the side surface of the contact support member 8 and the side surface of the socket 1a on the device main body side, and the contact waterproof member 9 is connected between the socket 1a and the contact support member 8. Seal the gap completely. In particular, the contact waterproofing member 9 includes protrusions 93a, 93b and protrusions 92a, 92b.
Is formed, the convex portions 93a and 93b of the contact waterproofing member 9 are more strongly pressed around the through holes 12a and 12b on the side surface of the socket 1a on the device inside side, while the contact supporting member 8 has the On the first surface, the convex portions 92a and 92b of the contact waterproofing member 9 are more strongly pressed around the base portions where the horizontal portions of the contacts 6 and 7 protrude. This allows
Through holes 12a, 12b of socket 1a and contact support member 8
And the contact support member 8 is supported by the lower case 1 via the socket 1a, and is supported by the upper case 2 via the positioning pin 2b.

Further, as the positioning pins 2b of the upper case 2 are inserted into the positioning holes 8a of the contact support member 8 up to the base, the board pressing pins 2c of the upper case 2 also come into contact with the printed board 3, and the printed board 3 Is pressed down. In this case, since the position of the support 1c of the lower case 1 and the position of the board pressing pin 2c of the upper case 2 match, the printed circuit board 3 is supported by the lower case 1 via the support 1c. It is supported by the upper case 2 via the substrate pressing pins 2c. In addition, by forming the positioning protrusion 11c of the support 1c so as to slightly protrude from the surface of the printed circuit board 3, and forming a hole into which the positioning protrusion 11c is fitted in the board pressing pin 2c, the electronic device is improved. When the assembly is completed, the positioning protrusions 11c of the columns 1c are fitted into the holes of the board pressing pins 2c with the printed board 3 interposed therebetween, so that the lower case 1 and the upper case 2 of the printed board 3 are more firmly supported. . When the rib 2a of the upper case 2 is fitted into the groove 1e of the lower case 1, the inside of the electronic device is completely sealed by the rib 2a and the case waterproofing member 5.

When the plug 4 is mounted in the state where the above-mentioned assembly is completed, the contact pin cover 4
The force applied to the socket 1a in the direction opposite to the arrow in the figure by fitting the sockets 1a and 4b into the fitting holes 11a and 11b is applied to the lower case 1 via the socket 1a.
The upper case 2 is received by the upper case 2 via the rib 2a fitted into the contact supporting member 8, and the force applied to the contact supporting member 8 via the socket 1a and the contact waterproofing member 9 is fitted into the positioning hole 8a of the contact supporting member 8. The upper case 2 receives through the positioning pins 2b of the upper case 2. Also,
The force applied to the printed circuit board 3 via the socket 1a, the contact waterproofing member 9 and the contact supporting member 8 in the direction opposite to the arrow in the drawing due to the attachment of the plug 4 is reduced via the column 1c and the board pressing pin 2c. Side case 1 and upper case 2
Receive each. Accordingly, excessive force is not applied to the contacts 6 and 7 when the plug 4 is attached, so that the solder for electrically and mechanically connecting the ends of the vertical portions of the contacts 6 and 7 and the printed circuit board 3 is peeled off. The function of the input / output unit 10 is not hindered. On the other hand, when the plug 4 is removed, the force applied to the socket 1a and the like in the direction of the arrow in FIG.
Since the lower case 1 and the upper case 2 are finally received, no excessive force is applied to the contacts 6 and 7, and the function of the input / output unit 10 is not hindered.

As described above, according to the configuration of this example, the contact support member 8 with the contacts 6 and 7 fitted thereto is fixed to the surface near one end of the printed circuit board 3, and Each end of the portion is soldered and the contact support member 8
A contact waterproofing member 9 is inserted into and closely adhered to the horizontal portions of the contacts 6 and 7 on one side surface. Thereby, the printed circuit board 3, the contacts 6, 7, the contact support member 8, and the contact waterproof member 9
Can be handled as a group of parts, so that the step of bonding the contact waterproofing member 9 to the side of the device body side of the socket 1a or the side of the contact supporting member 8 or screwing the contact waterproofing member 9 can be omitted. Components such as adhesives and screws used for screwing and screws can be omitted. Therefore, parts costs and assembly costs can be reduced accordingly. In addition, the printed circuit board 3, the contacts 6, 7, the contact support member 8, and the contact waterproofing member 9 can be easily removed from the lower case 1 as a unit during maintenance or replacement of parts. It does not take much time, and the inspection cost can be reduced accordingly. In addition,
If not only the socket 1a but also the contacts 6, 7 and the contact support member 8 of the input / output unit 10 are integrally formed in the lower case 1, the contact waterproofing member 9 becomes unnecessary. A connection cable for electrically connecting the ends of the patterns 6 and 7 and the lands of the pattern formed on the surface of the printed circuit board 3 and a step of soldering them are required. As a result, component costs and assembly costs increase. Also,
In such a configuration, at the time of maintenance and inspection or replacement of parts, soldering work for separating and reconnecting the ends of the contacts 6 and 7 and the connection cable is required, which is troublesome. As a result, the inspection cost increases. On the other hand, according to the configuration of this example, it is apparent that such a problem does not occur as described above.

Further, according to the configuration of this example, by providing the pressing taper portion 22b on the positioning pin 2b of the upper case 2, the pressing taper portion 2b is completed when the electronic device is assembled.
2b presses the printed circuit board 3, the contacts 6, 7 and the contact support member 8 in the direction of the arrow in the drawing, so that the contact waterproof member 9 completely seals between the socket 1a and the contact support member 8. This eliminates the need for a component or process for pressing the contact supporting member 8 on the side surface of the socket 1a on the device body side via the contact waterproofing member 9, so that the cost of parts and assembly can be reduced accordingly. As described above, according to the configuration of this example, the cost of parts, the cost of assembly, and the cost of inspection can be reduced, so that the cost of the entire electronic device combined with them can be reduced.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and changes in design and the like can be made without departing from the gist of the present invention. Even if there is, it is included in the present invention. For example, in the above-described embodiment, an example in which the plug 4 is a female and the socket 1a is a male has been described. However, the present invention is not limited to this.
May be male and socket 1a may be female. Further, in the above-described embodiment, an example in which the number of contacts is two has been described. However, the present invention is not limited to this, and the number of contacts may be any number. Further, in the above-described embodiment, the case where the input / output unit 10 is formed on the side surface of the electronic device has been described. However, the present invention is not limited thereto.
It may be provided on the upper surface or the lower surface, and may be provided not only on one surface but also on a plurality of surfaces. Further, in the above-described embodiment, the groove 1e is provided in the peripheral portion of the lower case 1, and the rib 2a is provided in the peripheral portion of the upper case 2.
Is described together with the case waterproofing member 5 in the groove 1e, but the present invention is not limited to this, and a rib is provided on the peripheral edge of the lower case 1 and a groove is provided on the peripheral edge of the upper case 2. You may. The shape of the case is not limited to the substantially cubic shape shown in FIGS. 1 and 2 as well as the substantially cylindrical shape, the substantially polygonal shape, the substantially conical shape, and the substantially polygonal pyramid as long as the surface on which the socket 1a is formed is flat. Any shape such as a shape may be used.

[0029]

As described above, according to the structure of the present invention, an excellent waterproof function is realized without using an expensive waterproof member, having a simple structure, easy assembling and maintenance and inspection. be able to. Therefore, the cost of parts, the cost of assembly, and the cost of inspection can be reduced, so that the cost of the entire electronic device can be reduced. Further, productivity and reliability can be improved by reducing the number of parts and the number of assembly steps.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a mechanical configuration of an electronic apparatus to which a waterproof mechanism of an electronic apparatus according to an embodiment of the present invention is applied, with an upper case removed.

FIG. 2 is a partially enlarged front sectional view of the electronic device.

FIG. 3 is a cross-sectional view of a contact waterproof member constituting the electronic device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower case 1a Socket 11a, 11b Fitting hole 12a, 12b Through hole 1b, 1c Prop 11c Positioning convex part 1d Guide 1e Groove (recess) 2 Upper case 2a Rib (convex part) 2b Positioning pin 21b Guide taper part 22b Press Taper portion 2c Board pressing pin 3, 3 'Printed circuit board 3a Positioning hole 4 Plug 4a, 4b Contact pin cover 5 Case waterproof member 6, 7 Contact 8 Contact support member 8a Positioning hole 9 Contact waterproof member 91a, 91b Hole 92a, 92b, 92a, 92b convex part 10 input / output part

Claims (6)

(57) [Claims] A first case and a second case each having a concave portion or a convex portion formed on a peripheral portion thereof, and a concave portion formed on one side is fitted with a convex portion formed on the other side to seal the inside, and A waterproof mechanism for an electronic device including components and a printed circuit board having a predetermined electrical function, wherein one side surface of the first case has a plurality of input / output signals for inputting / outputting signals to / from an external device. A socket having a plurality of through-holes formed therein and integrally connected to the plurality of pins is formed integrally with the first case. On the surface near one end, one end is electrically connected to a corresponding pattern formed on the printed board, and the other end is connected to the first printed board by the first board.
While supporting a plurality of contacts inserted into the socket from the corresponding through holes of the socket when stored in a predetermined position of the case, the printed circuit board is stored in a predetermined position of the first case. In this case, a contact support member having a hole formed in a direction perpendicular to a direction in which the plurality of through holes of the socket is formed is fixed, and the printed circuit board is housed in a predetermined position of the first case. At the time, a contact waterproof member made of an elastic body and formed with a plurality of holes for fitting to the plurality of contacts is formed on the side surface of the contact support member facing the inner surface of the socket. In a state in which the printed circuit board is housed at a predetermined position of the first case, the printed circuit board is provided inside the second case at a predetermined distance from one end of the second case. First and When fitting the convex portion formed on the other peripheral portion into the concave portion formed on the one peripheral portion of the second case, the second case is fitted into the hole of the contact support member and the second An electronic device, wherein a pin for pressing a contact support member against an inner side surface of the socket by a tapered portion formed at a root on one end side of the case is formed integrally with the second case. Waterproof mechanism. 2. A surface of the contact waterproofing member, which is in close contact with a side surface of the contact support member, surrounds the plurality of holes,
A plurality of ring-shaped first projections inclined toward the center of the corresponding hole are formed integrally with the contact waterproofing member, and the other surface of the contact waterproofing member has the plurality of first A plurality of ring-shaped second concentric circles having a diameter slightly larger than the diameter of the plurality of through holes of the socket and inclined toward the center of the corresponding hole;
2. The waterproofing mechanism for an electronic device according to claim 1, wherein said convex portion is formed integrally with said contact waterproofing member. 3. The printed circuit board is mounted near a side surface facing one side surface of the first case inner surface, supports the printed circuit board, and is fitted into a positioning hole formed in the printed circuit board. The waterproofing mechanism for an electronic device according to claim 1, wherein a support provided with a positioning protrusion is formed integrally with the first case. 4. Inside the first case, the printed circuit board is housed in a predetermined position of the first case inside the second case at a predetermined distance from the other end of the second case. When fitting a convex portion formed on the other peripheral portion into a concave portion formed on one peripheral portion of the case, a substrate pressing pin for pressing the printed circuit board against the support of the first case is formed by the substrate pressing pin. The waterproof mechanism for an electronic device according to claim 3, wherein the waterproof mechanism is formed integrally with the case (2). 5. The positioning projection is formed so as to protrude from the surface of the printed circuit board when fitted into the positioning hole of the printed circuit board, and presses the substrate against the second case. A hole is formed in the pin,
In a state where the printed circuit board is housed in a predetermined position of the first case, a concave portion formed on one peripheral portion of the first and second cases is provided with a convex portion formed on the other peripheral portion. 5. The waterproof mechanism for an electronic device according to claim 4, wherein when the fitting is performed, the positioning protrusion is fitted into a hole formed in the substrate pressing pin of the second case. 6. 6. A guide serving as a guide when the printed circuit board is housed in a predetermined position of the first case is provided on the inner side of the side facing the one side of the inner surface of the first case. The waterproof mechanism for an electronic device according to claim 1, wherein the waterproof mechanism is formed integrally with the case.