JPH0566831U - Switch structure - Google Patents

Abstract

(57) [Summary] [Purpose] To realize a push-button removal prevention mechanism that is not adversely affected by dust and the like by a simple means. [Structure] A push button 23 is inserted into an insertion hole of a housing 21, and a switch arranged inside the insertion hole is operated by a tip portion of the push button. A slit 23c is formed in the axial direction on the tip end side of the push button 23, and the slit 23c is formed.
Engaging projections 31a and 31b are formed at the tip end of the opposing surface of the housing, and the housing 21 is provided with a pin 28 located in the insertion hole and orthogonal to the slot. When installed in the insertion hole, the pin 28
Is configured so as to pass through the positions of the protrusions 31a and 31b, enter the slot and engage with the protrusion, and the push button is not separated from the insertion hole by the pin.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switch structure used for an operation unit such as a remote control device of a radio control device.

[0002]

[Prior Art]

 A conventional switch structure in which a switch can be turned on and off by operating a push button has a structure as shown in FIG. 2, for example. Reference numeral 11 denotes a housing, and a bearing 12 is attached to an opening of the housing 11, and a push button 13 is attached so as to be inserted into the bearing 12. The tip of the push button 13 can operate a switch inside the housing 11. A seat 14 is attached to the outer periphery of the bearing 12, and the seat 14 is attached to a mounting substrate 15. Further, a guard 16 is attached to the outer periphery of the seat 14 so as to surround the push button 13 protruding upward.

Between the seat 14 and the head portion 13a of the push button 13, a dustproof rubber 17 having a repulsive action is arranged. This is essential for switches used in dusty environments. The push button 13 is subjected to a repulsive force in the direction of the arrow in the drawing by a dustproof rubber 17 and a repulsion spring (not shown), and its regulation is formed by a collar 13b provided on the head 13a protruding from the inner wall of the guard 17. This is performed by locking the protrusion 16b. The push button 13 is prevented from coming off the bearing 12 by the restricting means, that is, the retaining means.

Further, the push button 13 is also restricted in its rotation. This is realized by forming a slit 13c at the tip of the push button 13 and inserting a pin 18 fixed to the housing 11 into the slit 13c. This rotation restricting means is provided because a nameplate 13d is provided on the head of the push button 13 so that this direction is constant.

[0005]

[Problems to be solved by the device]

 According to the above-mentioned conventional switch body, the following problems are caused in the retaining means for the push button 13. When it is used in a dusty place, dust enters between the brim 13b and the protrusion 16b and limits the movement stroke of the push button 13. That is, the push button 13 does not return while being pushed in the switch direction. In order to improve this, removal of the guard 16 was considered. However, if the guard 16 is removed, the push button 13 cannot be restricted in the axial direction, and the switch assembly itself cannot be used. Therefore, an object of the present invention is to provide a switch structure in which a push button detachment preventing mechanism that is not adversely affected by dust or the like is realized by a simple means.

[0006]

[Means for Solving the Problems]

 This invention is a switch structure in which a push button is inserted into an insertion hole of a housing, and a switch arranged inside the insertion hole is operated by a tip portion of the push button. A slot is formed, an engaging protrusion is formed at the tip of the facing surface of the slot, and a pin that is located in the insertion hole and is orthogonal to the slot is provided on the housing. When the push button is mounted in the insertion hole, the pin passes through the projection position and enters the slot to engage the projection, and the push button is inserted into the insertion hole by the pin. It is configured so as not to leave.

[0007]

[Action]

 By the above means, the push-button disengagement prevention mechanism can be realized inside the housing, and can be easily realized by utilizing the existing pin and slot.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Reference numeral 21 denotes a housing. A bearing 22 is attached to the opening of the housing 21, and a push button 23 is attached so as to be inserted into the bearing 22. The tip of the push button 23 can operate a switch inside the housing 11. The bearing 22 penetrates the substrate 25, and a seat 24 is attached to the outer periphery of the protruding tip thereof. The seat 24 is engaged with the mounting substrate 25 in the relationship of the protrusion and the locking hole. Further, a nut 30 is attached to the tip end of the bearing 22 penetrating the seat 24, and the seat 24 is fastened together with the board 25.

The push button 23 is vertically movable. Further, the push button 23 is biased outward of the housing by a repulsion spring (not shown) housed inside the housing. Further, between the head portion 23a of the push button 23 and the seat 23, a dustproof rubber that surrounds the tip of the bearing is arranged. Furthermore, one end of a guard 26 is attached to the outer periphery of the seat 24, and is arranged upright so as to surround the periphery of the button portion. The other end of the guard 26 is set higher than the normal head position of the push button 23 to prevent malfunction.

Next, the rotation restricting means of the push button 23 and the detachment preventing means will be described. As shown in FIGS. 1 (B) and 1 (C), a slit 23c is formed at the tip of the push button 23 in the axial direction. The pin 28 fixed to the housing 21 is arranged at a fixed position where it can enter the slot 23c. Since the pin 28 only needs to be in the fixed position, it may be attached to the fixed member inside the housing 11. The axial direction of the pin 28 is a direction orthogonal to the axial direction of the push button 23. Next, near the entrance of the slot 23c, engaging projections 31a and 31b are integrally formed facing each other. The tip portion of the push button 23 is molded of, for example, synthetic resin, and when the pin 28 enters the inside of the slot 23c, it acts so as to push open the slot 23c, and the engaging protrusions 31a and 31b. Pass through. Actually, this effect is obtained by pushing the push button 23 into the housing 21 from the bearing 22 side. The state after passing through the engaging projections 31a and 31b is as shown in FIG. 7C, and the push button 23 moves in the upper direction (arrow) when the projections 31a and 31b are locked to the pin 28. Regulated by The movement of the push button 23 in the pushing direction (opposite to the arrow in the figure) is within the length of the slot 23c. Next, the regulation of the rotation direction of the push button 23 is achieved because the slot 23c and the pin 28 are orthogonally engaged with each other and the pin 28 is fixed, as in the conventional case.

According to the switch structure described above, the mechanism for preventing the push button 23 from coming off is formed inside the housing 21. As a result, it is not necessary to provide a collar on the head of the push button 23 as in the conventional case, and much less to engage the collar with the engaging portion of the guard 26. In other words, between the guard 26 and the switch portion inside this is in an open state, it is easy to take out even if dust invades, and it is difficult for itself to interfere with the movement of the push button 23. Further, when dust is accumulated, it is possible to remove the guard 26 and clean the area around the switch section. In the above embodiment, the engaging protrusions 31a and 31b are provided so as to face each other.

[0013]

[Effect of the device]

 As described above, according to the present invention, a push button detachment preventing mechanism that is not adversely affected by dust or the like can be realized by a simple means.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

FIG. 2 is a structural explanatory view showing a conventional switch structure.

[Explanation of symbols]

21 ... Housing, 22 ... Bearing, 23 ... Push button, 2
4 ... Seat, 25 ... Board, 26 ... Guard, 23c ... Slot, 31a, 31b ... Engaging projection, 28 ... Pin.

Claims (1)

[Scope of utility model registration request] 1. A switch structure in which a push button is inserted into an insertion hole of a housing, and a switch disposed inside the insertion hole is operated by a tip portion of the push button, wherein a tip side of the push button is axially moved. Forming a slot,
An engaging projection is formed on at least one of the front end portions of the facing surfaces of the slot, while the housing is provided with a pin located in the insertion hole and orthogonal to the slot. When the push button is mounted in the insertion hole, the pin passes through the protrusion position and enters the slot to engage with the protrusion, and the push button is not separated from the insertion hole by the pin. A switch structure characterized by being configured.