JPH0656932U - Small remote control transmitter - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a case structure for a small remote control transmitter with a reduced number of parts, improved waterproofness and improved workability. [Structure] A board 10 on which electric parts constituting a remote control transmission circuit are mounted, a rubber button 20 attached to a switch on an upper surface side of the board 10, and a front case 30 fitted from above the rubber button 20. A back case 40 that can be attached from the lower surface side of the substrate 10
In a small remote control transmitter including, the rubber button 20 is closely attached to the peripheral edge of the substrate 10, and a protruding packing portion 21 is formed on the outer periphery of the rubber button 20. The packing portion 21 is in contact with the rib 41 formed inside the rear case 40 in a compressed state, so that the substrate 10 has a structure in which the rubber button 20 and the rear case 40 are hermetically sealed. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small remote control transmitter such as a wireless door lock, a security system, and a shutter opening / closing system. More specifically, in such a small remote control transmitter, it is possible to reduce the number of parts, improve waterproofness and improve workability. Regarding the case structure for planning.

[0002]

[Prior art]

 In recent years, small remote control transmitters have been diversifying and becoming more multifunctional, and the structure thereof is as described below. FIG. 5 is an exploded cross-sectional view for explaining the structure of the small remote controller transmitter according to the first conventional example. As shown in the figure, this type of small remote control transmitter comprises a substrate 110, a rubber button 120, a front case 130, a rear case 140, a packing 150 and a cover 160. Then, by pressing the protruding portion of the rubber button 120 from the opening of the front case 130, the micro switch 111 on the board 110 acts, and further the signal processing circuit on the board 110 operates to achieve the remote control transmission function. To be done. Also mounted on the substrate 110 is a driving battery 112 that is commonly used in small electrical devices. In this structure, the waterproof property between the front case 130 and the rear case 140, and the waterproof property between the front case 130 and the rubber button 120 are applied to the outer periphery of each of them and fixed to each other. Secured by Further, the structure is such that the battery 112 on the substrate 110 is replaced by opening and closing the cover 160. Regarding the waterproof property around the cover 160, the packing 150 is installed between the rear case 140 and the cover 160. Is secured by

FIG. 6 is an exploded cross-sectional view for explaining the structure of a small remote controller transmitter according to a second conventional example. As shown in the figure, this type of small remote control transmitter comprises a substrate 210, a rubber button 220 also serving as a packing, a front case 230 and a rear case 240. The waterproof property of this structure is ensured by interposing the packing / rubber button 220 between the front case 230 and the rear case 240 and fixing the cases with a plurality of screws. The battery 212 on the substrate 210 can be replaced by removing the screw and opening the rear case 240.

[0004]

[Problems to be solved by the device]

 However, the above-described small-sized remote controller according to the conventional technique has the following structural defects. That is, in the case of the method according to the first conventional example, the cost is increased because the number of custom parts is large. In addition, since it is necessary to apply the adhesive uniformly in order to ensure waterproofness, a dedicated system such as a jig for fixing the adhesive is required. Further, since it takes time to fix the adhesive, there is a problem in the assembling work. In other words, in the case of this method, capital investment is required, which results in cost increase when the lot volume is small, and is not suitable for high-mix low-volume production. In addition, the temperature dependence of adhesives imposes strict requirements on the adhesives used.

Next, in the case of the structure method according to the second conventional example, as shown in FIG. 7, the pressure applied to the packing portion of the rubber button 220 changes between the screw pitches, and the screw and the screw At the middle part between and, the pressure becomes lower than that near the screw, so there is a possibility of water infiltration. Furthermore, this is also a design problem because it leads to the case swelling in the middle part. Further, in the case of this structure, as can be seen from FIG. 6, the asperities of the rubber button 220 packing must be fitted into the asperities on the outer periphery of the front case 230 and the back case 240 during the assembly work. The sex becomes worse. Furthermore, there is a risk of water intrusion when the user replaces the battery.

In view of the above situation, an object of the present invention is to provide a case structure of a small remote control transmitter which has a reduced number of parts, improved waterproofness, and improved workability.

[0007]

[Means for Solving the Problems]

 The present invention achieves the above-mentioned object by focusing on the fact that the place where waterproofing is actually required is the substrate part, considering the substrate as an independent one, and simplifying the packing shape. That is, a board on which electrical components that make up a remote control transmission circuit are mounted, a rubber button attached to a switch on the upper surface side of the board, a front case that is capped from above the rubber button, and a board of the board. The structure of a small remote controller transmitter that has a rear case that can be worn from the bottom side is constructed as follows. First, the rubber button is shaped so that it can be tightly attached to the peripheral edge of the substrate. Also, a protruding packing part is formed around the outside of the rubber button. The packing is brought into contact with the rib formed inside the rear case in a compressed state, so that the substrate is sealed with the rubber button and the rear case.

A flat surface is formed on the upper surface of the rubber button, and a contact portion is formed on the inner surface of the front case so as to be in contact with the flat surface.

Further, at least one positioning rib is formed on the inner surface of the front case, and at least one groove is formed on the upper surface of the rubber button so as to be fitted with the positioning rib.

[0010]

[Action]

 With the above-described structure, the shape of the packing portion of the rubber button becomes simple, uniform pressure is applied to the packing portion from the side, and the pressure change in the packing portion becomes uniform. Further, the front case and the rubber button can be positioned easily because of the planar contact between the front case and the rubber button and the positioning ribs and grooves.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

2 and 3 are a front exploded perspective view and a rear exploded perspective view for explaining the structure of a small remote controller transmitter according to an embodiment of the present invention. In the assembly, first, the rubber button 20 is incorporated in the front case 30. Here, in order to simplify the alignment between the front case 30 and the rubber button 20, the contact portion 22 of the rubber button 20 has a planar shape, and correspondingly, the front case 30 contacts the rubber button 20. A planar contact portion 32 is also formed for obtaining a flat contact with the portion 22. The appearances of the front case 30 and the rear case 40 can be arbitrarily curved according to the design. Further, a structure for facilitating the positioning of the front case 30 and the rubber button 20 is provided. That is, the positioning ribs 35a, 35b, 35c and 35d are formed on the inner surface of the front case 30, and the grooves 23a, 23b corresponding to these positioning ribs are formed on the upper surface of the rubber button 20. , 23c and 23d are formed, and as shown in the cross-sectional view of FIG. 1, these ribs and grooves are fitted together.

Next, the substrate 10 is attached to the front case 30 via the rubber button 20 with two screws 80a and 80b. As a result, the rubber button 20 and the substrate 10 are fixed to the front case 30. The rubber button 20 has a shape in close contact with the peripheral edge of the substrate 10. FIG. 4 is a cross-sectional view of the board mounting screw 80a and its vicinity. As shown in this figure, a circumferential protrusion 34a is provided around the corresponding boss portion 33a of the front case 30. This prevents water from seeping from the board mounting screw 80a. The same applies to the board mounting screw 80b.

Finally, the front case 30 and the rear case 40 are assembled with the three screws 90a, 90b and 90c. As shown in the cross-sectional view of FIG. 1, the ribs 41 of the rear case 40 are inserted between the packing portion 21 of the rubber button 20 and the ribs 31 of the front case 30 to prevent water from entering the board 10. This is secured by compressing the portion 21 and placing the substrate 10 in a hermetically sealed state by the rubber button 20 and the rear case 40.

[0015]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following effects. (1) Since the shape of the packing portion of the rubber button does not match the outer appearance of the case but has a simplified shape with easy size, waterproof performance can be improved. (2) The structure does not sandwich the packing part from above and below, but compresses it by applying pressure from the side of the packing part, so deformation of the case and pressure change in the packing part are small. That is, the waterproof performance can be made uniform. (3) The number of parts is reduced. In addition, no special jigs are required for assembly work, so assembly workability is good. (4) Since the front case and the rubber button can be easily positioned, the assembly workability is good.

[Brief description of drawings]

FIG. 1 is an exploded sectional view illustrating a structure of a small remote controller transmitter according to an embodiment of the present invention.

FIG. 2 is a front exploded perspective view illustrating a structure of a small remote controller transmitter according to an embodiment of the present invention.

FIG. 3 is a rear exploded perspective view illustrating a structure of a small remote controller transmitter according to an exemplary embodiment of the present invention.

FIG. 4 is a partial exploded cross-sectional view for explaining a waterproof structure of a board screw portion of a small remote controller according to an embodiment of the present invention.

FIG. 5 is an exploded cross-sectional view for explaining the structure of the small remote controller transmitter according to the first conventional example.

FIG. 6 is an exploded cross-sectional view for explaining the structure of a small remote controller transmitter according to a second conventional example.

FIG. 7 is a diagram for explaining a pressure applied to a packing portion of a rubber button in a small remote controller transmitter according to a second conventional example.

[Explanation of symbols]

 10 ... Substrate 11a, 11b ... Micro switch 12 ... Battery 20 ... Rubber button 21 ... Packing part 22 ... Contact part with front case 23a, 23b, 23c, 23d ... Groove 30 ... Front case 31 ... Rib 32 ... With rubber button Contact portion 33a ... Boss portion 34a ... Protrusions 35a, 35b, 35c, 35d ... Positioning ribs 40 ... Rear case 41 ... Ribs 70 ... Key holders 80a, 80b ... Board mounting screws 90a, 90b, 90c ... Case mounting screws 110 ... Board 111 ... Micro switch 112 ... Battery 120 ... Rubber button 130 ... Front case 140 ... Rear case 150 ... Packing 160 ... Cover 210 ... Substrate 211 ... Micro switch 212 ... Battery 220 ... Rubber button 230 ... Front case 240 ... Rear case 290a, 290b …screw

Claims (3)

[Scope of utility model registration request] 1. A substrate (10) on which electric parts constituting a remote control transmission circuit are mounted, and the substrate (1).
0) a rubber button (20) attached to the switch on the upper surface side, a front case (30) fitted from the upper side of the rubber button (20), and a lower surface side of the substrate (10). A small remote control transmitter including a rear case (40), wherein the rubber button (20) is closely attached to a peripheral edge of the substrate (10), and the rubber button (20) is attached. A protruding packing part (21) is formed on the outer periphery, and the packing part (21) comes into contact with the rib (41) formed inside the rear case (40) in a compressed state, A small remote controller transmitter having a structure in which a substrate (10) is hermetically sealed by the rubber button (20) and a rear case (40). 2. A flat surface (22) is formed on the upper surface of the rubber button (20), and the front case (3) is formed.
The small remote controller transmitter according to claim 1, wherein the inner surface of (0) is formed with a contact portion (32) protruding to contact with the flat surface (22). 3. The front case (30) is provided with at least one positioning rib (35) on an inner surface thereof, and the rubber button (20) is provided with an positioning rib (35) on an upper surface thereof. 2. At least one groove (23) to be fitted is formed, characterized in that
Alternatively, the small remote controller transmitter according to claim 2.