Photoelectric induction switch

Abstract

The utility model discloses a photoelectric induction switch, which comprises a seat body, a button, an elastic reset piece, a first light guide body, a second light guide body and infrared geminate transistors, and is characterized in that the button is arranged on the seat body in a sliding manner, and the elastic reset piece is arranged between the seat body and the button; a buckle is arranged on one side of the button, the first light guide body is detachably connected to the button in a clamped mode through the buckle, the first light guide body is provided with a first light reflecting face, and the second light guide body is fixed to the base and provided with a second light reflecting face. The base body is arranged on the PCB, and a transmitting tube and a receiving tube of the infrared geminate transistor are respectively arranged on the PCB; the transmitting tube is positioned below the first light guide body, and the transmitting direction faces the first reflecting surface; the receiving tube is positioned below the second light guide body, and a receiving inlet faces the second reflective surface; when the button slides relative to the base body, the first light guide body moves relative to the second light guide body so as to change the light reflection quantity between the first light guide body and the second light guide body. The utility model has a simple structure and is convenient to assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to a button induction switch, especially to a photoelectric induction switch. BACKGROUND

[0002] The key of the keyboard is a kind of button induction switch, and each key is controlled to close by a single switch, and the switch usually has two kinds, one is mechanical switch, and the elastic conductive part is driven by button, so that the elastic conductive part and another conductive part are electrically contacted or disconnected to achieve the purpose of conduction or power-off, and then the pressing operation of keyboard is realized;The other is photoelectric switch, and the block between the two light guides is driven by button, so that the block moves to block the light path of photoelectric pair tube, and then the received photoelectric signal is changed, and the pressing operation of keyboard is realized.However, the photoelectric switch on the market now needs to set block and two light guides, and the installation position precision of light guide and block is high, so there are problems of complex structure and troublesome assembly. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a photoelectric induction switch with simple structure and convenient assembly.

[0004] In order to realize the above-mentioned purpose, the utility model provides a photoelectric induction switch, which comprises a seat body, a button, an elastic reset part, a first light guide, a second light guide and an infrared pair tube, the button is slidably arranged on the seat body, and the elastic reset part is arranged between the seat body and the button;One side of the button is provided with a buckle, the first light guide is detachably connected to the button through the buckle, the first light guide has a first reflecting surface, the second light guide is fixed to the seat body, and the second light guide has a second reflecting surface;The seat body is arranged on a PCB board, and the emitting tube and the receiving tube of the infrared pair tube are arranged on the PCB board respectively;The emitting tube is located below the first light guide and the emission direction is towards the first reflecting surface;The receiving tube is located below the second light guide and the receiving inlet is towards the second reflecting surface;When the button slides relative to the seat body, the first light guide moves relative to the second light guide to change the light reflection amount between the first light guide and the second light guide, so that the signal received by the receiving tube changes.

[0005] The utility model discloses a seat body and button are set, make the button slidingly set in the seat body, again with infrared pair pipe set PCB board, with the second light guide body is fixed on the seat body, and the first light guide body. Make the emission tube of infrared pair pipe towards the first light guide body, and the receiving tube is towards the second light guide body, thereby make the emission tube, first light guide body, second light guide body and receiving tube form the light path of light reflection and receiving, therefore, only need to press the button, make the first light guide body follow the button relative the second light guide body moves up and down, thereby can make the first light guide body with the second light guide body's reflective area change, further make the receiving tube received light change, reach the purpose of changing photoelectric signal, thus realize the pressing operation of button, this makes the first light guide body with button movement changes photoelectric signal's mode simplifies the structure of traditional photoelectric switch and adopts the blocking block to block the light path, and the parts are few, and the installation is simpler, convenient.

[0006] Preferably, the first reflective surface and the second reflective surface are arranged in axial symmetry when facing each other, and the included angle between each and the symmetry axis is 45 degrees. In this way, the light emitted by the emission tube can pass through the first reflective surface and be reflected back into the receiving tube.

[0007] Preferably, the buckle includes an upper clamping block and a lower clamping block, the upper clamping block has a positioning slope, the side of the first light guide body away from the first reflective surface is provided with a top abutting slope, the top abutting slope abuts with the positioning slope in parallel and fits with each other; the side of the first light guide body opposite to the first reflective surface is provided with a limiting step, and the adjacent two side walls of the limiting step abut on the adjacent two side faces of the lower clamping block. By arranging the upper clamping block and the lower clamping block, a clamping position for the first light guide body can be formed between the upper clamping block and the lower clamping block. Therefore, the first light guide body can be quickly and accurately installed on the button, improving the convenience of assembly and the accuracy of position.

[0008] Specifically, the number of the upper clamping blocks is at least two, and the positioning slopes of all the upper clamping blocks are on the same plane. In this way, the upper clamping blocks and the first light guide body can form multi-point abutting positioning, making the positioning more accurate.

[0009] Preferably, the first light guide body is recessed inwardly towards the light entrance surface of the emission tube. In this way, the incident light can be dispersed to all parts of the first reflective surface, which is conducive to the reflection of light.

[0010] Preferably, the second light guide body is convex outwardly towards the light exit surface of the receiving tube. In this way, the emitted light can be concentrated in the middle, so as to be received by the receiving tube, which is conducive to accurately collecting the amount of light and forming an accurate photoelectric signal.

[0011] Preferably, the seat body comprises an upper cover and a base, the upper cover is provided with a first fastening part, the base is provided with a second fastening part, the first fastening part is fastened with the second fastening part; an inner cavity for accommodating the button is formed between the upper cover and the base; the second light guide body is arranged on the base. By arranging the seat body in the detachable combination of the upper cover and the base, the button and the elastic reset member are more easily assembled, and the convenience of assembly is improved.

[0012] Specifically, the base is provided with a first channel and a second channel, the emitting tube is arranged in the first channel, and the receiving tube is arranged in the second channel. In this way, the loss of light can be reduced, and the accuracy of the photoelectric sensing signal can be improved.

[0013] Specifically, when the button is retracted into the seat body, the highest point and the lowest point of the first reflective surface are at the same height as the highest point and the lowest point of the second reflective surface respectively; after the button is extended out of the seat body, the highest point of the second reflective surface is below the lowest point of the first reflective surface. In this way, the reflective area between the first reflective surface and the second reflective surface can be gradually changed with the movement of the button, so as to achieve the purpose of outputting different light signals.

[0014] Preferably, the inner bottom surface of the seat body is protrudingly provided with a boss inwardly, the side surface of the second light guide body is recessedly provided with a groove inwardly, and the boss is clamped with the groove. By arranging the cooperation of the boss and the groove, the second light guide body can be conveniently and stably installed on the seat body, and the convenience of assembly and the accuracy of position are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural diagram of the photoelectric sensing switch of the utility model.

[0016] Figure 2 is an exploded view of the photoelectric sensing switch of the utility model.

[0017] Figure 3 is a sectional view of the photoelectric sensing switch of the utility model.

[0018] Figure 4 is an exploded view of the button and the first light guide body of the photoelectric sensing switch of the utility model.

[0019] Figure 5 is an exploded view of the base and the second light guide body of the photoelectric sensing switch of the utility model.

[0020] Figure 6 is a sectional view of the photoelectric sensing switch of the utility model when the button is pressed downward.

[0021] Figure 7It is the section view state diagram of the button of the photoelectric induction switch of the utility model after being pressed completely. DETAILED DESCRIPTION

[0022] In order to explain the technical content, construction features and effects of the utility model in detail, the following will be described in detail in combination with the embodiments and the drawings.

[0023] As Figures 1 to 3 shown, the photoelectric induction switch 100 of the utility model includes a seat body 1, a button 2, an elastic reset member 3, a first light guide body 4, a second light guide body 5 and an infrared pair tube, the seat body 1 is arranged on a PCB board 200 in a clamping manner, and a transmitting tube 6 and a receiving tube 7 of the infrared pair tube are arranged on the PCB board 200 respectively. The button 2 is slidingly arranged on the seat body 1, a sleeve 22 is arranged in the middle of the bottom surface of the button 2, the elastic reset member 3 is arranged between the seat body 1 and the button 2 and is sleeved outside the sleeve 22, and the elastic reset member 3 is a compression spring. One side of the button 2 is provided with a buckle 21, the first light guide body 4 is detachably clamped and connected to the button 2 through the buckle 21, the first light guide body 4 has a first reflecting surface 41, the second light guide body 5 is fixed to the seat body 1, and the second light guide body 5 has a second reflecting surface 51; the transmitting tube 6 is located below the first light guide body 4 and the emission direction is towards the first reflecting surface 41; specifically, the lower bottom surface of the seat body 1 is provided with a first accommodating cavity 11 which is in communication with the lower bottom surface and the inside of the seat body 1, and the transmitting tube 6 is located in the first accommodating cavity 11, so that the loss of light can be reduced. The receiving tube 7 is located below the second light guide body 5 and the receiving inlet is towards the second reflecting surface 51. The lower bottom surface of the seat body 1 is also provided with a second accommodating cavity 12 which is in communication with the lower bottom surface and the inside of the seat body 1, and the receiving tube 7 is located in the second accommodating cavity 12, so that the loss of light can be reduced and the accuracy of the photoelectric induction signal can be improved. The first reflecting surface 41 and the second reflecting surface 51 are arranged in axial symmetry when they face each other, and the included angle between each of them and the symmetry axis is 45 degrees. In this way, the light emitted by the transmitting tube 6 can be reflected back into the receiving tube 7 after passing through the first reflecting surface 41 and the second reflecting surface 51. When the button 2 slides relative to the seat body 1, the first light guide body 4 moves relative to the second light guide body 5 to change the amount of light reflection between the first light guide body 4 and the second light guide body 5, so that the signal received by the receiving tube 7 changes.

[0024] The buckle 21 comprises an upper clamping block 211 and a lower clamping block 212. The upper clamping block 211 has a positioning slope. The first light guide 4 has a stop slope 42 on the side opposite to the first reflecting surface 41. The stop slope 42 abuts against the positioning slope. The first light guide 4 has a limiting step 43 on the side opposite to the first reflecting surface 41. The lower clamping block 212 has two adjacent side surfaces which are perpendicular to each other. The two adjacent side surfaces abut against the two adjacent side walls of the limiting step 43. The upper clamping block 211 and the lower clamping block 212 form a clamping position for the first light guide 4. Therefore, the first light guide 4 can be quickly and accurately installed on the button 2, improving the convenience of assembly and the accuracy of position. Specifically, the number of the upper clamping block 211 is at least two. The positioning slopes of all the upper clamping blocks 211 are on the same plane. In this way, the upper clamping block 211 and the first light guide 4 can form multi-point abutting positioning, making the positioning more accurate.

[0025] Further, as shown in Figure 3 , Figure 6 and Figure 7 , when the button 2 is retracted into the seat body 1, the highest point and the lowest point of the first reflecting surface 41 are at the same horizontal height as the highest point and the lowest point of the second reflecting surface 51. When the button 2 is extended out of the seat body 1, the highest point of the second reflecting surface 51 is below the lowest point of the first reflecting surface 41. Of course, when the button 2 is extended out of the seat body 1, the highest point of the second reflecting surface 51 can also be between the lowest point and the highest point of the first reflecting surface 41. In this way, the reflecting area between the first reflecting surface 41 and the second reflecting surface 51 can gradually change with the movement of the button 2, achieving the purpose of outputting different light signals.

[0026] Further, as shown in Figures 3 to 5, the first light guide 4 is provided with an inwardly recessed structure 44 towards the light-incident surface of the emitting tube 6. This can make the incident light diverge everywhere of the first reflective surface 41, which is beneficial to the reflection of the light. In addition, the upper end of the first light guide 4 is provided with a triangular structure, one of the inclined surfaces of which forms the abutting inclined surface 42 / first reflective surface 41, and a vertical surface adjacent to the abutting inclined surface 42 / first reflective surface 41 and opposite to the second light guide 5 forms the light-incident plane 45 of the first light guide 4. The lower end of the first light guide 4 is provided with a columnar structure. Similarly, the upper end of the second light guide 5 is provided with a triangular structure, one of the inclined surfaces of which forms the second reflective surface 51, and a vertical surface adjacent to the second reflective surface 51 and opposite to the first light guide 4 forms the light-incident plane 52 of the first light guide 4. The lower end of the second light guide 5 is provided with a columnar structure. The second light guide 5 is provided with an outwardly protruding structure 53 towards the light-incident surface of the receiving tube 7. This can make the emitted light concentrate in the middle, so as to be received by the receiving tube 7, which is beneficial to accurately collecting the amount of light and forming an accurate photoelectric signal.

[0027] Please refer to Figure 3 , the seat body 1 comprises an upper cover 1a and a base 1b, the upper cover 1a is provided with a first fastening part 13, the base 1b is provided with a second fastening part 14, the first fastening part 13 is fastened with the second fastening part 14; the inner cavity of the upper cover 1a and the base 1b forms an inner cavity for accommodating the button 2; the second light guide 5 is arranged on the base 1b. By arranging the detachable combination of the upper cover 1a and the base 1b of the seat body 1, the button 2 and the elastic reset member 3 are more easily assembled, which improves the convenience of assembly.

[0028] Please refer to Figure 3 , the inner bottom surface of the seat body 1 is provided with a protrusion 17 protruding inwardly, the side surface of the second light guide 5 is provided with a groove 54 recessed inwardly, and the protrusion 17 is clamped with the groove 54. By arranging the cooperation of the protrusion 17 and the groove 54, the second light guide 5 can be conveniently and stably installed on the seat body 1, which effectively improves the convenience of assembly and the accuracy of position.

[0029] In combination with the above and Figure 3 , Figure 6 and Figure 7In operation, the button 2 is pressed to slide into the seat 1, the button 2 compresses the elastic reset member 3 and drives the first light guide 4 to move, the first light guide 4 moves relative to the second light guide 5, in the initial stage, the first reflecting surface 41 is staggered with the second reflecting surface 51, then, the first reflecting surface 41 gradually partially faces the second reflecting surface 51 in the horizontal position, thus, the reflecting areas of the two gradually increase, at this time, the light quantity from the emitting tube 6, reflected by the first reflecting surface 41, reflected by the second reflecting surface 51 and reaching the receiving tube 7 gradually increases, thus, the receiving tube 7 generates different photoelectric signals, or, when the button 2 is completely retracted into the seat 1 and the first reflecting surface 41 completely faces the second reflecting surface 51, the receiving tube 7 generates a changed photoelectric signal, thus, the operation of the button 2 can be transmitted to the control system through the PCB 200 and executed.

[0030] The utility model discloses the seat 1 and button 2 are set up, make the button 2 slide to set up in the seat 1, again set up infrared pair tube on the PCB 200, fix the second light guide 5 on the seat 1, and the first light guide 4. Make the emitting tube 6 of infrared pair tube face the first light guide 4, and the receiving tube 7 faces the second light guide 5, thus, the emitting tube 6, the first light guide 4, the second light guide 5 and the receiving tube 7 form the light path of light reflection and reception, thus, only need to press the button 2, make the first light guide 4 follow the button 2 relative the second light guide 5 moves up and down, thus can make the first light guide 4 and the reflecting area of second light guide 5 change, further make the light of receiving tube 7 change, reach the purpose of changing photoelectric signal, thus realize the pressing operation of key, this makes the first light guide 4 change photoelectric signal with the button 2 and moves the mode of simplifying the structure of traditional photoelectric switch to adopt the blocking block to block the light path, and the parts are few, and installation is simpler, convenient.

[0031] The structure and working principle of the infrared pair tube of the utility model photoelectric induction switch 100 are well known to those skilled in the art, and will not be described in detail here.

[0032] The above disclosure is only a preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, therefore, equivalent changes made in the utility model patent application scope still belong to the scope covered by the utility model.

Claims

1. A photoelectric sensing switch, characterized by: The application relates to a button for infrared remote control, which comprises a seat, a button, an elastic reset member, a first light guide body, a second light guide body and an infrared pair tube, the button is slidingly arranged on the seat, and the elastic reset member is arranged between the seat and the button; one side of the button is provided with a buckle, the first light guide body is detachably connected to the button through the buckle, the first light guide body has a first reflecting surface, the second light guide body is fixed to the seat, and the second light guide body has a second reflecting surface; the seat is arranged on a PCB, and a transmitting tube and a receiving tube of the infrared pair tube are arranged on the PCB respectively; the transmitting tube is located below the first light guide body and has a transmitting direction towards the first reflecting surface; the receiving tube is located below the second light guide body and has a receiving inlet towards the second reflecting surface; when the button slides relative to the seat, the first light guide body moves relative to the second light guide body, so as to change the light reflection amount between the first light guide body and the second light guide body, and the signal received by the receiving tube is changed. The first reflecting surface and the second reflecting surface are arranged in axial symmetry when they face each other, and the included angle between each of the first reflecting surface and the second reflecting surface and the symmetry axis is 45 degrees. The buckle comprises an upper clamping block and a lower clamping block, the upper clamping block has a positioning inclined surface, one side of the first light guide body away from the first reflecting surface is provided with a top abutting inclined surface, the top abutting inclined surface abuts with the positioning inclined surface in parallel and is in close contact with the positioning inclined surface; one side of the first light guide body opposite to the first reflecting surface is provided with a limiting step, and two adjacent side surfaces of the lower clamping block abut on two adjacent side walls of the limiting step respectively.

2. The photoelectric sensing switch according to claim 1, characterized in that: The number of the upper clamping blocks is at least two, and the positioning inclined surfaces of all the upper clamping blocks are on the same plane.

3. The photoelectric sensing switch of claim 1, wherein: The first light guide body is arranged in a concave manner towards the light inlet surface of the transmitting tube.

4. The photoelectric sensing switch of claim 3, wherein: The second light guide body is arranged in a convex manner towards the light outlet surface of the receiving tube.

5. The photoelectric sensing switch of claim 1, wherein: The seat comprises an upper cover and a base, the upper cover has a first buckling part, the base has a second buckling part, the first buckling part is buckled with the second buckling part, and an inner cavity for accommodating the button is formed between the upper cover and the base; 6. The photoelectric sensing switch of claim 1, wherein: The second light guide body is arranged on the base.

7. The photoelectric sensing switch of claim 1, wherein: The base is provided with a first channel and a second channel, the transmitting tube is located in the first channel, and the receiving tube is located in the second channel. When the button is retracted into the seat, the highest point and the lowest point of the first reflecting surface are at the same horizontal height as the highest point and the lowest point of the second reflecting surface respectively; after the button is extended out of the seat, the highest point of the second reflecting surface is located below the lowest point of the first reflecting surface.

8. The photoelectric sensing switch of claim 7, wherein: The inner bottom surface of the seat is protruded inwardly and provided with a boss, the side surface of the second light guide body is recessed inwardly and provided with a groove, and the boss is buckled with the groove.

9. The photoelectric sensing switch of claim 2, wherein: ​ 10. The photoelectric sensing switch of claim 1, wherein: ​

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