JP2004179121A - Push to talk switch structure of radio communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a PTT switch structure of radio communication device which is easy to assemble, superior in design, capable of reducing size and securing high waterproofing performance. <P>SOLUTION: An operation lever installation recess 31 is provided on the wall face of a front casing member 3 that constitutes at least a part of the casing 2, and a tact switch (momentary switch) operating hole 33 is provided at the portion facing the tact switch 7 on the bottom 32 of this operation lever installation recess 31, and this tact switch operating hole 33 is sealed by an elastic water-proof material 6. The operation lever 5 is pivotally fitted so that an operating part 51 is inserted into the operating lever installation recess 31, and by the insertion, the other end of the operation lever is pivotally held at the pivoting part arranged inside recessed part 31 for mounting the operation lever, so as to make the other end freely rotate with a prescribed stroke width around the one end side as a center. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a PTT switch structure for a wireless communication device.
[0002]
[Prior art]
Conventionally, as shown in FIG. 6, a casing 110 surrounding a main body of a casing 110 has a front casing member 111 and a rear casing member 112 in which the casing 110 is divided into two by a side surface thereof, and an end face on an opening side thereof is abutted against each other. A wireless communication device 100 formed by assembling the device is on the market.
In the case of the wireless communication device 100, a concave groove (not shown) having a substantially U-shaped cross section is formed along an end surface, which is a joint surface between the front casing member 111 and the rear casing member 112, so as to face the opening. The end faces are joined so that an elastic sealing material (not shown) is fitted across the two concave grooves, so that the casing 110 is joined from the joining surface between the front casing member 111 and the rear casing member 112. A waterproof structure is provided to prevent water from entering the inside (see Patent Document 1).
[0003]
In the meantime, the wireless communication device 100 has the waterproof structure as described above, but cannot obtain high waterproof performance such as JIS protection class 7 which is required in recent years. That is, in the case of the wireless communication device 100, the operation lever 120 of the PTT switch for operating the tact switch provided in the casing 110 is partially sandwiched between the front casing member 111 and the rear casing member 112. Since the front casing member 111 and the rear casing member 112 are mounted in the state, the notch 140 is provided in the mounting portion of the operation lever 120 of the front casing member 111 and the rear casing member 112, and a part of the groove is cut off. Therefore, a portion where the end surfaces of the front casing member 111 and the rear casing member 112 are not directly joined to each other occurs near the mounting portion of the operation lever 120, and the joining pressure becomes non-uniform, so that high waterproof performance such as JIS protection class 7 is obtained. I can't get it.
[0004]
In order to achieve higher waterproof performance, a wireless communication device 200 as shown in FIGS. 7 and 8 has already been proposed. That is, the radio communication device 200 is configured such that the operation button 220 is attached to the concave portion 211 provided on the peripheral wall surface of the rear casing member 210 from the outside of the rear casing member 210, so that the front casing member 230 and the rear casing The structure is such that the member 210 and the member 210 are uniformly joined over the entire circumference to ensure waterproof performance satisfying the JIS protection class 7 class.
[0005]
In the wireless communication device 200, the operation button 220 is integrally formed of an elastic material such as silicone rubber, and has a sheet-like elastic water-stopping portion 221 having a size that fits into the concave portion 211; The operation button 220 also serves as an elastic water-stopping material. Then, after the operation button 220 is arranged so that the elastic water blocking part 221 is fitted into the concave part 211, the frame member 240 is exposed to the outside through the through hole 241 provided in the frame member 240. And the frame member 240 is fixed to the rear casing member 210 with the screw 250, the operation button 220 is mounted on the rear casing member 210, and the tact switch provided on the bottom of the concave portion 211 by the operation button 220. The operation hole 260 is closed in a water-tight manner to prevent water from entering the casing from the PTT switch portion.
[0006]
However, in such a structure of the PTT switch, the frame member 240 must be fixed to the rear casing member 210 using the fine screw 250, so that the assembling workability is poor. Further, the screw 250 is screwed into the screw receiving portion of the rear casing member 21 in a state where the adhesive is applied so that the screw 250 is not loosened. However, if an impact is applied to the casing, the adhesive is broken. As a result, the screws 250 may be removed, which may hinder the waterproof performance. In addition, since the screw 250 is exposed on the surface of the casing, there is a slight problem in the appearance of the product. Further, the recess 211 must be large enough to fit not only the operation button 220 but also the frame member 240 into the casing member, and the mounting space for the PTT switch is considerably large, such as the screw receiving portion protruding into the casing. This necessitated a reduction in the size of the casing.
[0007]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-297659
[Problems to be solved by the invention]
In view of the above circumstances, an object of the present invention is to provide a PTT switch structure of a wireless communication device that is easy to assemble, is excellent in design, can be downsized, and can ensure high waterproof performance.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a PTT switch structure of a wireless communication device according to claim 1 of the present invention (hereinafter referred to as “switch structure of claim 1”) includes a tact switch provided in a casing, The operation lever of the switch is mounted on the casing so that the switch pressing part can be freely separated from and connected to the tact switch, and transmits the pressing force of the switch pressing part to the tact switch while being elastically deformed, and from the outside into the casing. In a PTT switch structure of a wireless communication device in which an elastic water-stopping material for preventing infiltration of water is disposed between a tact switch and an operation lever, the operation lever is mounted on a wall surface of a casing member constituting at least a part of a casing. A recess is provided, and a tact switch operation hole is formed in a portion of the bottom of the recess for mounting the operation lever facing the tact switch. The tact switch operation hole is sealed by an elastic water blocking material, and the operation lever has an operation portion fitted into the operation lever mounting recess, and the operation lever is provided in the operation lever mounting recess by the fitting. Is pivotally mounted on the center of the body with a predetermined stroke width.
[0010]
According to a second aspect of the present invention, there is provided a PTT switch structure of a wireless communication device (hereinafter, referred to as a “switch structure of the second aspect”). An extension piece having a locking claw at the tip from the other end side extends in the bottom direction of the operation lever mounting concave portion, and is pushed into the operation lever mounting concave portion while the operating portion is pivotally supported by the pivot portion. As a result, the extension piece is elastically deformed and enters the operation lever mounting recess, and elastically restores at the position of the locking stopper of the operation lever provided in the operation lever mounting recess, and the locking claw is released. The rotation stroke width of the operation unit is restricted by being locked by the locking unit.
[0011]
According to a third aspect of the present invention, there is provided a PTT switch structure of a wireless communication device (hereinafter, referred to as a “third switch structure”), wherein the operation unit is provided with an operation lever. The outer peripheral shape is substantially the same as the inner peripheral shape of the opening of the recess.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments.
1 to 5 show one embodiment of a wireless communication device according to the present invention.
[0013]
As shown in FIGS. 1 to 3, in the wireless communication device 1, a PTT switch 4 is provided on a front casing member 3 that forms a part of a casing 2 made of a synthetic resin.
As shown in FIGS. 3 to 5, the PTT switch 4 includes an operation lever 5, an elastic waterproof material 6, a tact switch 7, a tact switch mounting portion 81 of a flexible board 8, and a fixed cover 9. ing.
[0014]
The front casing member 3 has, on a part of a peripheral wall thereof, an operation lever mounting concave portion (hereinafter referred to as a “mounting portion”) having a substantially rectangular opening having an opening portion extending in the vertical direction of the front casing member 3 and having a rounded corner. The concave portion 31 is provided in the front casing member 3 by fitting the operation lever 5 from the outside of the front casing member 3 in the mounting concave portion 31.
That is, the tactile switch operation hole 33 is formed in the mounting recess 31 at a position on the bottom 32 facing the tactile switch 7 described later.
[0015]
In the mounting recess 31, a bearing recess 34 serving as a pivotal support of a shaft 52 provided on the operation lever 5, which will be described later, is formed in a surface of the inner wall located below the front casing member 3. A locking hole 37 is formed in the other side of the longitudinal direction (upper side of the front casing member 3) as a locking portion for preventing a tip of an extension piece 53 to be described later from entering.
The operation lever 5 includes an operation portion 51, a shaft portion 52, an extension piece 53, and a switch pressing portion 54.
[0016]
The operating portion 51 has substantially the same outer peripheral shape as the inner peripheral wall of the opening of the mounting concave portion 31, and has three ridges 51a for preventing slippage on its surface in parallel.
The shaft portion 52 projects from the operation portion 51 so as to protrude from one end of the back surface of the operation portion 51 in the longitudinal direction, and the shaft portion main body 52a is extended with respect to the short side of the operation portion 51. And a main body supporting portion 52b for supporting in parallel.
[0017]
The extension piece 53 extends perpendicularly to the back surface of the operation unit 51 at the other end in the longitudinal direction of the operation unit 51, and gradually protrudes from the distal end toward the other end in the longitudinal direction of the operation unit 51 at the tip. A locking claw 53a having a substantially triangular cross section having such a tapered surface 53b is provided.
The switch pressing portion 54 is provided substantially at the center of the operation portion 51 so as to protrude from the rear surface, and has a substantially columnar shape.
Also, between the switch pressing portion 54 and the extension piece 53, when the operating portion 51 rotates toward the mounting recess 31, the tip of the extension piece 53 abuts against the bottom 32 of the mounting recess 31. A stopper projection 56 is provided so as not to hit the bottom of a concave portion 63 of the elastic water-stopping material 6 described later.
[0018]
Then, the operation lever 5 inserts the shaft main body 52 a into the bearing recess 34 from the opening of the mounting recess 31, and arranges the mounting recess 31 so as to be substantially hidden by the operating portion 51. The other end of the operation portion 51 is pressed toward the mounting recess 31 until the pawl 53a enters the front casing member 3 through the locking hole 37, so that the operation portion 51 is mounted on the front casing member 3.
[0019]
Further, when the operating portion 51 is pressed toward the mounting recess 31, the tapered surface 53 b of the locking claw 53 a contacts the inner edge of the locking hole 37, and the extending piece 53 is extended by the taper of the tapered surface 53 b. When the piece 53 enters the front casing member 3 from the locking hole 37 while elastically deforming so as to bend in the direction of the switch pressing portion 54, and the locking claw 53a completely enters the front casing member 3, the extension piece 53 Is returned to the original state by the elastic restoring force, so that the locking claw 53a protrudes from the inner edge of the locking hole 37 to the other end side of the operation portion 51.
[0020]
That is, the operation lever 5 is merely fitted into the mounting recess 31, and the switch pressing portion 54 is turned around the shaft main body 52 a until the stopper projection 56 hits the bottom 32 of the mounting recess 31. 7, and is pivotally attached to the front casing member 3 with a stroke that rotates in a direction away from the tact switch 7 until the locking claw 53a hits the edge of the locking hole 37 and is locked.
[0021]
The elastic water-stopping material 6 is made of synthetic rubber or synthetic resin elastomer, has a fixed portion 61 and a movable portion 62, and has substantially the same size as the bottom 32 of the mounting concave portion 31.
The fixing portion 61 is watertightly fixed on the back surface of the mounting concave portion 31 through a double-sided tape 61a so as to surround the tact switch operation hole 33 and the locking hole 37, and extends to a portion facing the locking hole 37. A recess 63 larger than the locking hole 37 into which the tip of the projection 53 enters is formed.
[0022]
When the fixed portion 61 is fixed to the back surface of the mounting concave portion 31, the movable portion 62 has a fitting concave portion 64 a which protrudes from the tact switch operation hole 33 into the mounting concave portion 31, and the switch pressing portion 54 is fitted to the tip surface thereof. The operating portion 51 is pressed toward the inside of the casing 2, and the protruding portion 64 is switched by the switch 64. When pressed by the pressing portion 54, the thin portion 65 is elastically deformed, and the protruding portion 64 enters the inside of the front casing member 3 via the tact switch operation hole 33, and a protrusion provided on the back surface of the protruding portion 64. The portion 64b presses a tact switch 7 described later. When the pressing on the operation unit 51 is released, the protruding portion 64 returns to the state before the pressing by the elastic restoring force, and the pressing on the tact switch 7 is released. In other words, the operating portion 51 rotates about the shaft main body 52a in a direction away from the tact switch 7 until the locking claw 53a hits the edge of the locking hole 37 and is locked.
[0023]
The fixing portion 61 is provided with a fitting concave portion 64a on the inner surface of the front casing member 3, into which a tact switch mounting portion 81 of the flexible substrate 8 described later fits.
[0024]
The tact switch 7 is mounted on the tact switch mounting portion 81 of the flexible board 8, and the fixed cover 9 is mounted on the front casing member 3 with the tact switch mounting portion 81 fitted in the fitting recess 64 a. The projection 64 is set at a position facing the projection 64b.
In the tact switch mounting portion 81, small holes 82 are formed so as to sandwich the tact switch 7 from both sides.
[0025]
As shown in FIGS. 3 to 5, the fixed cover 9 is formed by punching and bending a metal plate such as a stainless steel plate, and has a rectangular shape substantially the same as or slightly larger than the elastic waterproof material 6. A main body 91 provided with a cutout 91a serving as an outlet to the inside of the casing 2 of the flexible board 8 at the center of one long side edge, and bent at a right angle from the other long side and both short sides of the main body 91. A side cover portion 92 of the elastic water-stopping material 6 formed as described above, and a flange portion 93 provided so as to be bent at a right angle outward from the side cover portion 92 on the short side. Then, as shown in FIGS. 3 and 4, with the elastic water-stopping material 6 and the tact switch 7 arranged at predetermined mounting positions, the notch 91 a is placed at the top and the flange 93 is placed in the longitudinal direction of the mounting recess 31. The front casing member 3 is mounted by slidingly fitting a slide groove 39 provided so as to sandwich the back surface of the mounting concave portion 31 from both sides. Further, by this mounting, the main body portion 91 presses the tact switch mounting portion 81 of the flexible substrate 8 and the fixing portion 61 of the elastic water blocking material 6 against the back surface side of the mounting concave portion 31, and the waterproofing by the elastic water blocking material 6. As a result, the tact switch mounting portion 81 is firmly fixed at a predetermined position.
[0026]
A small hole 91b having substantially the same diameter is formed in the body 91 of the fixed cover 9 at a position corresponding to the small hole 82 of the tact switch mounting portion 81 when the fixed cover 9 is mounted.
When assembling the PTT switch 4, the operation lever 5 may be attached to the front casing member 3 first or last.
[0027]
As described above, in the PTT switch structure of the wireless communication device 1, the operation lever 5 inserts the shaft main body 52a into the bearing recess 34 from the opening of the mounting recess 31, and the mounting recess 31 is After being arranged so as to be substantially hidden, the other end of the operating portion 51 is simply pressed toward the mounting recess 31 until the locking claw 53a of the extension piece 53 enters the front casing member 3 through the locking hole 37. Since it can be mounted on the front casing member 3, it is easy to assemble, it is excellent in design because screws and the like are not exposed on the surface, and the mounting concave portion 3 has a size enough to fit only the operation lever 5, The size of the casing 2 can be reduced.
In addition, since the mounting recess 31 is provided in the front casing member 3, the front casing member 3 and the rear casing member (not shown) can be uniformly joined over the entire circumference thereof, and satisfies the JIS protection class 7 class. A high waterproof performance can be ensured, and a casing strength that can withstand business use can be obtained.
[0028]
Moreover, since the operation portion 51 of the operation lever 5 is rotatable about the shaft portion main body 52a, there is little backlash. In addition, since the operation portion 51 has an outer peripheral shape that is substantially the same as the inner peripheral wall of the opening of the mounting concave portion 31, there is less rattling and an excellent operational feeling.
Since the small holes 82 and 91b are provided in the tact switch mounting portion 81 and the main body 91 of the fixed cover 9, respectively, the click sound of the tact switch 7 resonates in the casing 2 through the small holes 82 and the small holes 91b. Operation feeling can be increased.
[0029]
The present invention is not limited to the above embodiment. For example, in the above embodiment, the mounting recess 31 is provided in the front casing member 3, but may be provided in the rear casing member.
In the above-described embodiment, the locking claw 53a is locked in the locking hole 37 formed in the bottom 32 of the mounting recess 31. A concave portion may be provided in a portion corresponding to the locking claw 53a, and the locking claw may be locked on a surface of the concave portion on the opening side of the mounting recess.
In the above embodiment, the tact switch 7 is mounted on the flexible board 8, but may be mounted on a printed board.
[0030]
【The invention's effect】
Since the PTT switch structure of the wireless communication device according to the present invention is configured as described above, it is easy to assemble, is excellent in design, can be downsized, and has high waterproofness satisfying JIS protection class 7 class. Performance can be ensured.
In particular, according to the switch structure of the third aspect, the operation lever can be smoothly operated without rattling, and the operability is further improved.
[Brief description of the drawings]
FIG. 1 is a front view showing one embodiment of a wireless communication device according to the present invention.
FIG. 2 is a side view of a front casing member of the wireless communication device of FIG. 1;
FIG. 3 is a sectional view taken along line XX of FIG. 2;
FIG. 4 is a sectional view showing a state where an operation lever is removed from FIG. 3;
FIG. 5 is an exploded perspective view of a PTT switch portion of the wireless communication device of FIG.
FIG. 6 is an exploded side view showing an example of a conventional wireless communication device.
FIG. 7 is an exploded side view showing another example of a conventional wireless communication device.
FIG. 8 is an exploded perspective view of the wireless communication device of FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wireless communication apparatus 2 Casing 3 Front casing member 31 Operation lever mounting concave part 32 Bottom 33 Tact switch operation hole 34 Bearing concave part (pivot part)
37 Locking hole (locking lock)
4 PTT switch 5 Operating lever 51 Operating section 53 Extension piece 53a Locking claw 6 Elastic water blocking material 7 Tact switch

Claims (3)

A tact switch is provided in the casing, and an operation lever of the tact switch is mounted on the casing so that a switch pressing portion of the tact switch can be freely attached to and detached from the tact switch.
A radio communication device in which an elastic water-stopping material that transmits the pressing force of the switch pressing portion to the tact switch while elastically deforming and that prevents water from entering the casing from the outside is disposed between the tact switch and the operation lever. In the PTT switch structure of
An operation lever mounting recess is provided on a wall surface of a casing member constituting at least a part of the casing,
A tact switch operation hole is formed in a portion of the bottom of the operation lever mounting recess facing the tact switch, and the tact switch operation hole is sealed with an elastic water blocking material,
The operating lever is configured such that the operating portion is fitted into the operating lever mounting recess, and the fitting is rotatably mounted at a predetermined stroke width around the pivot provided in the operating lever mounting recess by the fitting. A PTT switch structure of a wireless communication device. The operating lever is operated in a state in which an extending piece having a locking claw at the tip from the other end of the operating portion extends in the bottom direction of the operating lever mounting concave portion, and the operating portion is pivotally supported by the pivot portion. When the extension piece is elastically deformed by being pushed into the lever mounting recess, it enters into the operation lever mounting recess, and elastically restores at the position of the locking stopper portion of the operation lever provided in the operation lever mounting recess. The PTT switch structure for a wireless communication device according to claim 1, wherein a rotation stroke width of the operation unit is regulated by locking the locking claw to the locking unit. The PTT switch structure for a wireless communication device according to claim 1 or 2, wherein the operating portion has an outer peripheral shape substantially the same as an inner peripheral shape of the opening of the operation lever mounting recess.

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