JP2003008253A - Electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components as mush as possible, and to facilitate disassembling and reassembling waterproofness in an electronic equipment, such as a transmitter or the like for a wireless door lock. SOLUTION: The electronic equipment comprises a casing member 60, knobs 80a to 80c, and a cover 70 integrally formed through insert molding, as an insert molding member I.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device that requires waterproofness.

[0002]

2. Description of the Related Art Conventionally, a wireless door lock transmitter for an automobile, which is an example of this kind of electronic equipment,
As shown in FIGS. 3 and 4, both casing members 10,
20, a transmission operation knob 30, a cover 40, and a circuit member 50.

The casing members 10 and 20 are assembled with each other to form a casing C. The casing member 10 is made of a resin material and has a substantially U-shaped cross section, including a peripheral wall 10a and a bottom wall 10b. .

The casing member 20 is composed of a peripheral wall 20a and an upper wall 20b and is made of a resin material in a substantially U-shaped cross section. The upper wall 20b has openings 21 to 23 formed therein.
Are formed in a substantially square shape in the arrangement shown in FIGS. 3 and 4. Thus, the casing member 20 is fitted into the peripheral wall 10a of the casing member 10 at the peripheral wall 20a to form the casing C. The casing member 20 is engaged with each of the engagement holes 13 formed in the peripheral wall 10a of the casing 10 by resisting the elasticity of the claws 25 formed on the outer surface of the peripheral wall 20a.

In the operation knob 30, the substrate portion 30a and the knob portions 30b to 30d are integrally formed of a resin material, and the knob portions 30b to 30d are respectively provided in the openings 21 to 23 of the casing member 20. It is formed so as to project from the substrate portion 30a to the surface side at a corresponding position. As a result, the operation knob 30 is moved to the casing member 2
0, the knob portions 30b to 30d are inserted into the openings 21 to 23 of the casing member 10, respectively, and the base plate portion 30a is inserted into the upper wall 2 of the casing 20.
0b from the back side.

The cover 40 is integrally formed of a rubber material with a peripheral wall 40a, an upper wall 40b and an O-ring 40c in a generally U-shaped cross section.
It is integrally formed along the opening end of 0a. As a result, the cover 40 is provided in the casing C with the base portion 30 a of the operation knob 30 and the bottom wall 10 b of the casing member 10.
Accommodated between. With this accommodation, the cover 40 is
The peripheral wall 40a is fitted into the peripheral wall 20a of the casing member 20 so that the upper wall 40b is brought into contact with the base plate portion 30a from the rear surface side thereof, and the O-ring 40c is used to open the peripheral wall 20a of the casing member 20. It is sandwiched between the end surface 24 and the outer peripheral portion 11 of the bottom wall 10b of the casing member 10.
The upper wall 40b is adapted to abut on the back surface of each of the knob portions 30b to 30d at each raised wall portion 41 thereof.

The circuit member 50 is housed in the cover 40. The circuit member 50 is a wiring board 51, and the projection 42 of the upper wall 40b of the cover 40 and the casing member 10 are provided.
It is sandwiched between each projection 12 of the bottom wall 10b of b.
However, the protrusions 42 are integrally formed so as to project from the upper wall 40b toward the inside thereof, and the respective protrusions 12 are integrally formed so as to integrally protrude from the bottom wall 10b toward the inside thereof.

Further, the circuit member 50 has respective normally open type switch parts 52, and these switch parts 52 are respectively arranged at positions corresponding to the knob parts 30b to 30d.
It is provided on the wiring board 51. As a result, each switch portion 52 is pushed through the raised wall portion 41 of the cover 40 by the pushing of the corresponding knob portion 30b to 30d from the surface side thereof to turn on. In FIG. 4, reference numeral 5
3 indicates another wiring board, and reference numeral 54 indicates a battery.

[0009]

By the way, in the above transmitter, when the circuit member 50 is housed in the casing C, both casing members 10 and 20, the operation knob 30 for transmission.
Since the cover 40 and the cover 40 are separate parts, the number of parts is large, which causes a problem of high cost.

Further, the cover 40 has an O-ring 40c in order to prevent the infiltration of moisture into the inside thereof, and an open end 24 of the peripheral wall 20a of the casing member 20 and an outer peripheral portion of the bottom wall 10b of the casing member 10 by means of an O-ring 40c. 11 is sealed, but the cover 40 is attached to the peripheral wall 4 when the transmitter is assembled.
0a or the like causes a twist, resulting in a defect that the O-ring 40c is poorly waterproofed.

In view of the above, the present invention reduces the number of parts in an electronic device such as a transmitter for a wireless door lock and the like, and is easy to disassemble and reassemble and waterproof. The purpose is to improve.

[0012]

In order to solve the above problems, in the electronic device according to the invention described in claim 1, the bottom wall (10b) and the peripheral wall (10a) are formed of a resin material in a U-shaped cross section. First casing member (10)
A second casing member (60) having a U-shaped cross section made of a resin material by the upper wall (60b) and the peripheral wall (60a), and the upper wall and the peripheral wall of the second casing member from the inner surface side thereof, respectively. A cover (70) having a U-shaped cross section having an upper wall (70a) and a peripheral wall (70b) along with at least one opening (61, 62, 63) formed in the upper wall of the second casing. ) Is provided with a knob portion (80a, 80b, 80c) formed of a resin material on the upper wall of the cover and a circuit member (50), and the cover has a second portion from an opening end portion of its peripheral wall. It integrally has an O-ring (70c) formed so as to extend outward along the opening end face of the peripheral wall of the casing in an L-shaped cross section, and the cover is formed by insert molding of a rubber material to 2 caseins The insert molding member (I) is formed together with the member and the knob portion, and the insert molding member is formed on the peripheral wall of the second casing and in the peripheral wall of the first casing member so as to accommodate the circuit member. The O-ring is mounted alongside, and is sandwiched between the open end surface of the peripheral wall of the second casing member and the outer peripheral portion of the bottom wall of the first casing, and the circuit member faces the knob portion via the upper wall of the cover. And a switch portion (52) which is operated by pushing the knob portion.

As described above, since the second casing member, the cover and the knob portion are formed as a single insert molding member, the number of parts of the transmitter is the insert molding member, the circuit member and the first casing member. Reduced to three points. As a result, it is possible to ensure a reduction in cost due to a reduction in the number of electronic device assembly steps and a reduction in the number of parts.

In the insert molded member, the peripheral wall of the cover is formed in close contact with the inner peripheral surface of the peripheral wall of the second casing member, and the O-ring is in close contact with the open end surface of the peripheral wall of the second casing member. Is formed. Therefore, the original shape of the peripheral wall of the cover and the O-ring is
It is maintained by the rigidity of the peripheral wall of the second casing member.
Therefore, as described above, even if the peripheral wall of the insert-molded member is fitted into the peripheral wall of the first casing member, the peripheral wall of the cover and the O-ring can always maintain the original shape without being distorted. Therefore, the O-ring can uniformly and reliably seal between the opening end surface of the second casing and the outer peripheral portion of the bottom wall of the first casing, and thus can exhibit a good waterproof function.

According to the invention described in claim 2, in the invention described in claim 1, the inner peripheral surface of the opening portion of the upper wall of the second casing and the outer peripheral surface (81 to 83) of the knob portion are provided. A predetermined gap is provided between them.

As a result, the function and effect of the invention described in claim 1 can be achieved, and when the knob portion is pushed, the corresponding portion of the upper wall of the cover to the knob portion is easily elastic. It can be deformed and the switch part can be surely operated.

The reference numerals in parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiments described later.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show an example in which the present invention is applied to a wireless door lock transmitter installed in a passenger car. This transmitter has an insert molding member I
And the casing member 10 and the circuit member 50 already described with reference to FIG.

The insert-molded member I is formed by insert-molding the casing member 60, the cover 70, and the knob portions 80a to 80c.

The casing member 60 is formed of a resin material in a substantially U-shaped cross section with the peripheral wall 60a and the upper wall 60b corresponding to the peripheral wall 20a and the upper wall 20b of the casing member 20 described above, respectively. The upper wall 60b of 60 is the upper wall 20b of the casing member 20.
Each opening 6 corresponding to each opening 21 to 23 of
1 to 63 (see FIGS. 1 and 2). Here, the plate thickness of the peripheral wall 60a is set to have an appropriate rigidity in order to prevent the peripheral wall 60a from being distorted by an external force. It should be noted that the casing member 60 is engaged with the claws 64 formed on the outer surface of the peripheral wall 60a from the outside in the engagement holes 13 formed in the peripheral wall 10a of the casing 10 against the elasticity thereof. Has become.

The cover 70 includes a peripheral wall 40a of the cover 40,
The peripheral wall 70a and the upper wall 70b and the O-ring 70c corresponding to the upper wall 40b and the O-ring 40c, respectively, are integrally formed of a rubber material in a substantially U-shaped cross section. Along the section to the outside L
It is integrally formed in a bent shape (see FIG. 1). Here, the O-ring 70c has its surface 71
It is provided in close contact with the opening end surface 65 of the peripheral wall 60a of the casing member 60 along the circumferential direction thereof. The cover 7
The upper wall 70a of 0 has a protrusion 72 corresponding to the protrusion 42 of the upper wall 40b of the cover 40 described above.
2 is integrally formed to project from the upper wall 40b to the inside.

The knobs 80a to 80c correspond to the knobs 30b to 30c (see FIG. 3) of the operation knob 30 described above.
Through 80c are formed of a resin material on the surface of the upper wall 70a of the cover 70 through the openings 61 through 63 of the casing member 60. However, a predetermined gap L is provided between the outer peripheral surface 81 of the knob portion 80a and the inner peripheral surface of the opening 61. In the gap L, when the knob portion 80a is pushed from the front surface side, the corresponding portion of the upper wall 70a of the cover 70 with respect to the knob portion 80a can be easily elastically deformed to surely turn on the switch portion 52. Is set. Even between the outer peripheral surface 82 of the knob portion 80b and the inner peripheral surface of the opening portion 62 and between the outer peripheral surface 83 of the knob portion 80c and the inner peripheral surface of the opening portion 63, the outer peripheral surface 81 of the knob portion 80a and the opening portion are formed. 61
Similarly to the inner peripheral surface of the, the gaps L are provided.

Now, a method of molding the insert molding member I will be described. First, the casing member 60 and each of the knob portions 80a to 80c are separately molded using a resin material. After that, both molding dies forming an inner shape corresponding to the outer shape of the insert molding member I specified from FIG. 1 and FIG. 2 are prepared, and each knob portion 80a is provided in these both molding dies. To 80c and casing member 60
Are set at the positions illustrated in FIG. Then, in such a state, a rubber material is injected in a liquid state into a space corresponding to the outer shape of the covers 70 formed in both the molding dies, and is cured by heating to form the covers 70.
Insert molding is performed as the insert molding member I.

In the present embodiment configured as described above, the circuit member 5 is arranged so that each switch portion 52 faces the corresponding knob portion 80a to 80c through the upper wall 70a of the cover 70.
After housing 0 in the casing member 10, the peripheral wall 60a of the casing member 60 of the insert molding member I is fitted into the peripheral wall 10a of the casing member 10. Along with this, the peripheral wall 60a of the casing member 60 is
The casing member 10 is engaged in the engagement holes 13 of the peripheral wall 10a against the elasticity of the peripheral wall 10a. With this,
The peripheral wall 70b of the cover 70 and the peripheral wall 60a of the casing member 60, which correspond to the peripheral wall of the insert-molded member I, are interposed between the peripheral wall 10a of the casing member 10 and the circuit member 50, and the O-ring 70c is attached to the casing member 10. It sits on the outer peripheral portion 11 of the bottom wall 10b. As a result, the O-ring 70c is sandwiched between the opening end surface 65 of the peripheral wall 60a of the casing member 60 and the outer peripheral portion 11 of the bottom wall 10b of the casing member 10 to seal between the opening end surface 65 and the outer peripheral portion 11. This completes the assembly of the transmitter.

Here, as described above, the casing member 6
0, the cover 70, and the knobs 80a to 80c are formed by insert molding as a single insert molding member I. Therefore, the insert molding member I, the circuit member 50, and the casing member 1 are used as the number of parts of the transmitter.
It is reduced to three points of 0. As a result, it is possible to secure a reduction in cost due to a reduction in the number of assembling steps of the transmitter and a reduction in the number of parts.

In the insert molded member I,
The peripheral wall 70b of the cover 70 is the peripheral wall 6 of the casing member 60.
The O-ring 70c is formed in close contact with the inner peripheral surface of the casing member 60 along the opening end surface 65 of the peripheral wall 60a of the casing member 60. Therefore, the original shapes of the peripheral wall 70b of the cover 70 and the O-ring 70c are maintained by the rigidity of the peripheral wall 60a of the casing member 60. Therefore, as described above, even if the peripheral wall of the insert molding member I is fitted into the peripheral wall 10a of the casing member 10,
The peripheral wall 70b and the O-ring 70c of the cover 70 can always maintain the original shape without distortion. Therefore, the O-ring 70c can reliably and uniformly seal between the opening end surface 65 and the outer peripheral portion 11, and thus can exhibit a good waterproof function.

Further, as described above, between the outer peripheral surface 81 of the knob portion 80a and the inner peripheral surface of the opening portion 61, between the outer peripheral surface 82 of the knob portion 80b and the inner peripheral surface of the opening portion 62, and between the knob portion. 80c
A predetermined gap L is provided between the outer peripheral surface 83 and the inner peripheral surface of the opening 63. Thus, when any of the knob portions 80a to 80c is pushed from the surface side, the knob portion 8 of the upper wall 70a of the cover 70 is pushed.
The corresponding part corresponding to any of 0a80a to 80c can be easily elastically deformed to reliably turn on the switch part 52.

In implementing the present invention, not only the wireless door lock transmitter for passenger cars described in the above embodiments, but also a wireless door lock transmitter for automobiles and other vehicles and a waterproof structure are required. The present invention may be applied to various electronic devices including a switch unit.

[Brief description of drawings]

1 is an exploded cross-sectional view taken along line 1-1 of FIG.

FIG. 2 is a front view showing an embodiment of a wireless door lock transmitter for a passenger car according to the present invention.

FIG. 3 is a front view of a conventional transmitter for a wireless door lock of an automobile.

4 is an exploded cross-sectional view taken along the line 4-4 of FIG.

[Explanation of symbols]

I ... Insert-molded member, 10, 60 ... Casing member, 10a, 60a, 70b ... Peripheral wall, 10b ... Bottom wall, 5
0 ... Circuit member, 60b, 70a ... Upper wall, 61 to 63 ...
Opening, 70 ... Cover, 70c ... O-ring, 80a, 8
0b, 80c ... Knob part.

Claims (2)

[Claims] 1. A first casing member (10) having a bottom wall (10b) and a peripheral wall (10a) formed in a U-shaped cross section by a resin material, and a resin having a top wall (60b) and a peripheral wall (60a). A second casing member (6 formed of a material having a U-shaped cross section)
0), and a cover (70) having a U-shaped cross section so as to have an upper wall (70a) and a peripheral wall (70b) respectively extending from the inner surface side to the upper wall and the peripheral wall of the second casing member, A knob part (8) formed of a resin material on the upper wall of the cover so as to project through at least one opening (61, 62, 63) formed on the upper wall of the second casing.
0a, 80b, 80c) and a circuit member (50), and the cover extends outward from the opening end of the peripheral wall along the opening end surface of the peripheral wall of the second casing in an L-shaped cross section. Integrally formed with the O-ring (70c) formed as described above, and the cover constitutes an insert molding member (I) together with the second casing member and the knob portion by insert molding with a rubber material. The insert-molded member is fitted in the first casing member along the peripheral wall of the second casing so as to accommodate the circuit member, and the O-ring is formed in the first casing member. 2 is sandwiched between an opening end surface of a peripheral wall of the casing member and an outer peripheral portion of a bottom wall of the first casing, and the circuit member is positioned to face the knob portion via an upper wall of the cover. An electronic device having a switch unit for switch actuation (52) by pressing of the probe portion. 2. A predetermined gap is provided between the inner peripheral surface of the opening of the upper wall of the second casing and the outer peripheral surface (81 to 83) of the knob portion. The electronic device according to claim 1.