Laser proximity sensor

Abstract

The utility model relates to a laser proximity sensor, and relates to the technical field of sensors, the laser proximity sensor comprises a shell, a working assembly and a cover plate, the shell is provided with a placing groove convenient for placing the working assembly, and the cover plate is arranged on the shell through ultrasonic welding and performs waterproof sealing on the placing groove. The shell is provided with a control assembly for manually controlling the state of the working assembly, the shell is provided with a sealing film for conducting sealing connection on the control assembly, and the sealing film is sealed on the shell in a waterproof mode and has certain elasticity. According to the invention, the working assembly is fixedly installed in the placement groove, then the shell provided with the control assembly is subjected to waterproof sealing through the elastic sealing film, and finally the cover plate is welded and installed on the shell through ultrasonic waves and the placement groove is subjected to waterproof sealing, so that the interior of the shell is completely sealed and isolated from the exterior. Therefore, the waterproof performance of the laser sensor is improved, and the damage probability of the laser in a humid environment is reduced.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and in particular to laser proximity sensors. Background Technology

[0002] A laser sensor is a sensor that uses laser technology for measurement. It consists of a laser and [missing information - likely a specific component or element]. Laser sensors have advantages such as high speed, high accuracy, large measurement range, and strong resistance to light and electrical interference.

[0003] Currently, most of the components of the sensor are manufactured separately, then fixed in the housing with bolts, and finally the end cap is locked to the housing with bolts to complete the assembly of the laser sensor.

[0004] However, since the components of the laser sensor are connected by bolts, and the housing of the laser sensor is small and thin, the bolts can easily pass through the housing. At the same time, gaps are easily generated at the bolt connection points, resulting in poor water resistance of the laser sensor. When working in a humid environment, the laser sensor is easily damaged. Utility Model Content

[0005] To improve the waterproofness of laser sensors and reduce the probability of laser damage in humid environments, this application provides a laser proximity sensor.

[0006] The laser proximity sensor provided in this application adopts the following technical solution:

[0007] A laser proximity sensor includes a housing, a working component, and a cover plate. The housing has a slot for placing the working component. The cover plate is ultrasonically welded onto the housing and waterproofs and seals the slot. The housing has a control component for manually controlling the status of the working component. The housing also has a sealing membrane for sealing the control component. The sealing membrane is waterproof and has a certain degree of elasticity.

[0008] By adopting the above technical solution, the working components are fixedly installed in the placement slot, and then the housing containing the control components is waterproofed by an elastic sealing membrane. Finally, the cover plate is welded onto the housing by ultrasonic welding and the placement slot is waterproofed, so that the inside of the housing is completely sealed and isolated from the outside, thereby improving the waterproofness of the laser sensor and reducing the probability of the laser being damaged in a humid environment.

[0009] Furthermore, the working components include:

[0010] A circuit board, which is snapped into a placement slot and is used to generate laser light and receive reflected laser light.

[0011] A bracket, which is snapped onto the housing and connected to the circuit board, is used to adjust the passing laser.

[0012] A light-transmitting plate is disposed on the housing and seals the end of the bracket away from the placement slot. The light-transmitting plate allows laser light to pass through.

[0013] By adopting the above technical solution, the bracket adjusts the laser beam that passes through, and the light-transmitting plate facilitates the passage of the laser while improving the waterproofness of the connection between the bracket and the housing. The circuit board is used to generate the laser and calculate the distance to the obstacle based on the time of the received reflected laser beam.

[0014] Furthermore, the housing has a stepped hole that communicates with the inside of the placement slot. The bracket is snapped into the stepped hole and engages with the circuit board. The light-transmitting plate is waterproof and sealed to the bracket and is sealed against the side wall of the stepped hole. The end face of the light-transmitting plate is flush with the end face of the housing.

[0015] By adopting the above technical solution, the bracket is snapped into the stepped hole, then the light-transmitting plate is sealed and pressed against the bracket, and finally the gap between the light-transmitting plate and the side wall of the stepped hole is waterproofed and sealed. At the same time, the light-transmitting plate and the end face of the shell are flush with each other, thereby reducing the probability of water accumulation at the connection between the light-transmitting plate and the shell.

[0016] Furthermore, the control component includes:

[0017] A switching button is provided on the housing and is used to switch the state of the circuit board;

[0018] An adjustment button is provided on the housing and is used to adjust the main control board. Both the switching button and the adjustment button are located inside the sealing membrane.

[0019] By adopting the above technical solution, the switching button is used to switch the working state of the sensor, and the adjustment button is used to adjust the sensor parameters. The switching button and the adjustment button are waterproofed by an elastic sealing membrane, which reduces the amount of water that may enter the placement slot through the gap between the switching button and the adjustment button and the housing. This makes it easier to adjust the sensor and also improves the sensor's waterproofness.

[0020] Furthermore, the housing is provided with a button hole for easy installation of a switching button, the switching button comprising:

[0021] A connecting block, wherein the connecting block has a planar spiral structure, one end of the connecting block is disposed on the side wall of the key hole, and the connecting block can undergo elastic deformation;

[0022] A button block is disposed on a connecting block. The button block can move along the direction close to the main control board under the action of external force. When the button block moves, it causes the connecting block to undergo elastic deformation.

[0023] By adopting the above technical solution, the button block can move along the direction close to the circuit board under the action of external force. When the button block moves, it causes the connecting block to undergo elastic deformation and finally press against the switch on the control board. When the external force disappears, the connecting block restores its deformation and causes the button block to reset.

[0024] Furthermore, the adjustment button includes:

[0025] A button body, which is rotatably mounted on a housing and is elongated in shape;

[0026] The push rods are arranged on both ends of the same side of the button body. When one end of the button body is pressed, the other end is raised and the pressed end is pressed against the circuit board.

[0027] By adopting the above technical solution, when one end of the button body is pressed, the other end is raised, and the push rod of the pressed end is pressed against the control plate. When the middle of the button body is pressed, both ends are balanced and neither is in contact with the control plate.

[0028] Furthermore, multiple sets of snap-fit ​​blocks are provided on the bottom of the placement slot, and the multiple sets of snap-fit ​​blocks cooperate with each other to form multiple sets of fixing slots for snap-fitting and fixing the working component.

[0029] By adopting the above technical solution, multiple sets of fixing slots composed of multiple sets of snap-fit ​​blocks are used to snap-fit ​​and fix the circuit board and the bracket respectively, thereby improving the stability of the working components inside the housing.

[0030] Furthermore, the support includes:

[0031] A frame, which is mounted on a housing;

[0032] A light guide tube is mounted on the frame and connected to the circuit board. The light guide tube is used to guide the laser emitted by the circuit board.

[0033] A focusing tube is mounted on a frame and connected to a circuit board. The focusing tube is used to focus reflected laser light and guide it onto the circuit board. The focusing tube has a tapered structure and the diameter of the end closer to the circuit board is smaller than the diameter of the end farther from the circuit board.

[0034] By adopting the above technical solution, the frame is fixedly installed on the housing and used to fix the light guide tube and the focusing tube. The light guide tube guides the emitted laser light, and the focusing tube facilitates the collection of the reflected laser light, thereby improving the stability of the sensor.

[0035] Furthermore, the housing has multiple sets of locking holes, which are isolated from the placement groove. An internal threaded sleeve is provided in the locking hole to form an internal threaded hole.

[0036] By adopting the above technical solution, the locking hole and the placement groove are isolated from each other. The locking hole and the internal threaded sleeve form an internal threaded hole that facilitates locking the sensor, thereby reducing the probability of water entering the placement groove through the internal threaded hole.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] By fixing the circuit board and bracket in the placement slot, then clamping the light-transmitting plate into the stepped hole and pressing it against the bracket, and waterproof sealing the stepped hole, the housing containing the switching button and adjustment button is waterproofed by using an elastic sealing membrane. Finally, the cover plate is ultrasonically welded onto the housing and the placement slot is waterproofed, thus completely isolating the inside of the housing from the outside, thereby improving the waterproofness of the laser sensor and reducing the probability of damage to the laser in a humid environment. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the sensor structure of this application;

[0040] Figure 2 This is a schematic diagram of the exploded structure of this application;

[0041] Figure 3 This is a schematic diagram of the shell structure of this application.

[0042] Reference numerals: 1. Housing; 11. Placement slot; 12. Locking hole; 13. Internal threaded sleeve; 14. Cover plate; 15. Stepped hole; 2. Working component; 21. Circuit board; 22. Bracket; 221. Frame; 222. Light guide tube; 223. Concentrating tube; 23. Light-transmitting plate; 3. Control component; 31. Switching button; 311. Connecting block; 312. Button block; 32. Adjustment button; 321. Button body; 322. Push rod; 4. Snap-fit ​​block; 5. Sealing film. Detailed Implementation

[0043] The following is combined with Figure 1-3 This application is described in further detail.

[0044] This application discloses a laser proximity sensor.

[0045] Reference Figure 1 and Figure 2The laser proximity sensor includes a housing 1, a working component 2, and a cover plate 14. The housing 1 has a placement slot 11 for placing the working component 2. The cover plate 14 is ultrasonically welded onto the housing 1 and waterproof seals the placement slot 11. The housing 1 is equipped with a control component 3 for manually controlling the state of the working component 2. The housing 1 is also equipped with a sealing membrane 5 for sealing the control component 3. The sealing membrane 5 is waterproof and has a certain degree of elasticity.

[0046] Reference Figure 2 and Figure 3 The housing 1 has a placement slot 11, and the working component 2 is snapped into the placement slot 11. The working component 2 includes a circuit board 21, a bracket 22, and a light-transmitting plate 23. The circuit board 21 is snapped into the placement slot 11 and is used to generate laser and receive reflected laser. The circuit board 21 specifically includes a control board, a main board, a laser, and a receiver. The control board is snapped into the placement slot 11, and the control component 3 is connected to the control board and controls or adjusts the circuit board 21 through the control board. The main board is fixedly mounted on the control board. The laser is fixedly mounted on the main board and is used to generate laser. The receiver is fixedly mounted on the main board, and the receiver and laser are installed side by side. The receiver is used to receive reflected laser. In use, the main board controls the laser to emit laser. After the laser hits an obstacle, it is reflected. The reflected laser is received by the receiver. The main board calculates the emission time of the laser and the reception time of the receiver to determine the distance to the obstacle.

[0047] Reference Figure 2 and Figure 3 The bracket 22 is snapped onto the housing 1 and electrically connected to the circuit board 21. The bracket 22 is used to adjust the passing laser. The housing 1 has a stepped hole 15 that communicates with the inside of the placement slot 11. The bracket 22 includes a frame 221, a light guide tube 222, and a focusing tube 223. The frame 221 is snapped into the stepped hole 15, and the end face of the frame 221 is lower than the end face of the housing 1 along the axis of the stepped hole 15. The side wall of the frame 221 is tightly fitted with the side wall of the stepped hole 15 to reduce the probability of water entering the frame 221. The light-transmitting plate 23 is fixed on the frame 221 and waterproofly sealed to the frame 221. The end of the light-transmitting plate 23 away from the placement slot 11 is snapped and sealed with the end of the stepped hole 15. The end face of the light-transmitting plate 23 is flush with the end face of the housing 1, thereby reducing the probability of water accumulation at the connection between the light-transmitting plate 23 and the housing 1. At the same time, the light-transmitting plate 23 allows the laser to pass through, which facilitates the normal use of the sensor.

[0048] Reference Figure 2 and Figure 3The light guide tube 222 is fixedly installed on the frame 221. The other end of the light guide tube 222 is sealed and installed on the circuit board 21 to wrap the laser. The angle of the laser emitted by the laser is adjusted by the light guide tube 222, thereby improving the stability of laser emission. At the same time, the wrapping of the emitted laser by the light guide tube 222 reduces the probability of the laser being captured by the receiver inside the housing 1 and causing misjudgment. The focusing tube 223 is fixedly installed on the frame 221. The focusing tube 223 is connected to the circuit board 21 and wraps the receiver. The focusing tube 223 has a conical structure. The diameter of the end of the focusing tube 223 near the circuit board 21 is smaller than the diameter of the end away from the circuit board 21. The larger diameter facilitates the reception of the laser reflected from outside the housing 1. After the laser enters the focusing tube 223, it reaches the receiver, which facilitates the reception of the laser.

[0049] Reference Figure 2 and Figure 3 Multiple sets of snap-fit ​​blocks 4 are fixedly installed on the bottom of the placement slot 11. The multiple sets of snap-fit ​​blocks 4 cooperate with each other to form multiple sets of fixing slots for snap-fit ​​fixing of the working component 2. When the fixing slot fixes the control board, the width of the fixing slot is equal to the thickness of the control board. When the fixing slot fixes the light guide tube 222, the width of the fixing slot is equal to the width of the light guide tube 222 in contact with the bottom of the placement slot 11, thereby improving the stability of the working component 2 in the housing 1.

[0050] Reference Figure 2 and Figure 3 The control component 3 includes a switching button 31 and an adjustment button 32. The switching button 31 is mounted on the housing 1 and is used to switch the state of the circuit board 21. The control board is equipped with a switching switch, and the housing 1 has a button hole for easy installation of the switching button 31. The switching button 31 includes a connecting block 311 and a button block 312. The connecting block 311 has a planar spiral structure, and one end of the connecting block 311 near the housing 1 is fixedly mounted on the side wall of the button hole. The connecting block 311 can undergo elastic deformation. The button block 312 is fixedly mounted on the connecting block 311 and located at the center of the button hole. The button block 312 can move in the direction close to the control board under the action of external force. When the button block 312 moves, it causes the connecting block 311 to undergo elastic deformation and finally press against the switching switch on the control board. When the external force disappears, the connecting block 311 returns to its original shape and causes the button block 312 to reset.

[0051] Reference Figure 2 and Figure 3An adjustment button 32 is located on the housing 1 and is used to adjust the main control board. Two sets of through holes are arranged side by side on the housing 1. The adjustment button 32 includes a button body 321 and a push rod 322. The button body 321 is a long strip structure and is rotatably mounted on the housing 1. Two sets of push rods 322 are provided, and the two sets of push rods 322 are located at both ends on the same side of the button body 321. The two sets of push rods 322 pass through a set of through holes respectively. When one end of the button body 321 is pressed, the other end is raised, and the push rod 322 at the pressed end is pressed against the control board. When the middle of the button body 321 is pressed, both ends are balanced and neither is in contact with the control board. In this embodiment, the two sets of push rods 322 are used to adjust the detection distance of the sensor.

[0052] Reference Figure 2 and Figure 3 Since the control component 3 is movable, there is a gap between the placement slot 11 and the outside. A sealing film 5 is fixedly installed at the position of the control component 3 on the housing 1. The sealing film 5 is waterproof and sealed to the housing 1, thereby improving the waterproofness of the sensor. At the same time, the sealing film 5 also has a certain elasticity, so that the sealing film 5 can move with the switching button 31 or the adjustment button 32.

[0053] Reference Figure 1 and Figure 2 The housing 1 has multiple sets of locking holes 12. The locking holes 12 are isolated from the placement groove 11. An internal threaded sleeve 13 is fixedly installed in the locking hole 12 to form an internal threaded hole, so as to facilitate locking the laser sensor. At the same time, since it is isolated from the placement groove 11, the probability of water seeping into the placement groove 11 is reduced.

[0054] Reference Figure 2 and Figure 3 After the working component 2 is completely fixedly installed inside the housing 1, the cover plate 14 is fixedly snapped onto the housing 1 and the placement groove 11 is sealed. Then, the cover plate 14 is welded onto the housing 1 by ultrasonic welding, so that the working component 2 inside the housing 1 is completely sealed and isolated from the outside, thereby improving the waterproofness of the laser sensor and reducing the probability of the laser being damaged in a humid environment.

[0055] The working principle of this application embodiment is as follows:

[0056] By fixing the circuit board 21 and bracket 22 in the placement groove 11, and then clamping the light-transmitting plate 23 in the stepped hole 15 and pressing it against the bracket 22, and waterproof sealing the stepped hole 15, the housing 1 with the switching button 31 and adjustment button 32 is waterproof sealed by the elastic sealing film 5. Finally, the cover plate 14 is welded to the housing 1 by ultrasonic welding and waterproof sealing the placement groove 11, so that the inside of the housing 1 is completely sealed and isolated from the outside, thereby improving the waterproofness of the laser sensor and reducing the probability of the laser being damaged in a humid environment.

[0057] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A laser proximity sensor, characterized in that: The device includes a housing (1), a working component (2), and a cover plate (14). The housing (1) has a placement slot (11) for placing the working component (2). The cover plate (14) is ultrasonically welded onto the housing (1) and waterproof seals the placement slot (11). The housing (1) is equipped with a control component (3) for manually controlling the state of the working component (2). The housing (1) is equipped with a sealing membrane (5) for sealing the control component (3). The sealing membrane (5) is waterproof and waterproof on the housing (1) and has a certain elasticity.

2. The laser proximity sensor according to claim 1, characterized in that: The working component (2) includes: Circuit board (21), which is snapped into the placement slot (11) and is used to generate laser and receive reflected laser; A bracket (22) is snapped onto the housing (1) and connected to the circuit board (21). The bracket (22) is used to adjust the passing laser. A light-transmitting plate (23) is disposed on the housing (1) and seals the end of the bracket (22) away from the placement groove (11). The light-transmitting plate (23) allows the laser to pass through.

3. The laser proximity sensor according to claim 2, characterized in that: The housing (1) has a stepped hole (15) that communicates with the inside of the placement groove (11). The bracket (22) is snapped into the stepped hole (15) and is snapped into the circuit board (21). The light-transmitting plate (23) is waterproof and sealed to the bracket (22) and is sealed and pressed against the side wall of the stepped hole (15). The end face of the light-transmitting plate (23) is flush with the end face of the housing (1).

4. The laser proximity sensor according to claim 2, characterized in that: The control component (3) includes: A switching button (31) is provided on the housing (1) and is used to switch the state of the circuit board (21); Adjustment button (32) is set on housing (1) and used to adjust the main control board. Both the switching button (31) and the adjustment button (32) are set inside the sealing film (5).

5. The laser proximity sensor according to claim 4, characterized in that: The housing (1) has a button hole for easy installation of a switching button (31), the switching button (31) including: Connecting block (311), the connecting block (311) has a planar spiral structure, one end of the connecting block (311) is disposed on the side wall of the key hole, and the connecting block (311) can undergo elastic deformation; A button block (312) is disposed on a connecting block (311). The button block (312) can move along the direction close to the main control board under the action of external force. When the button block (312) moves, it causes the connecting block (311) to undergo elastic deformation.

6. The laser proximity sensor according to claim 4, characterized in that: The adjustment button (32) includes: Button body (321), which is rotatably mounted on housing (1) and is elongated; Push rods (322), two sets of push rods (322) are respectively set on the two ends of the same side of the button body (321). When one end of the button body (321) is pressed, the other end is raised and the pressed end is pressed against the circuit board (21).

7. The laser proximity sensor according to claim 1, characterized in that: The bottom of the placement slot (11) is provided with multiple sets of snap-fit ​​blocks (4), and the multiple sets of snap-fit ​​blocks (4) cooperate with each other to form multiple sets of fixing slots for snap-fit ​​fixing of the working component (2).

8. The laser proximity sensor according to claim 2, characterized in that: The support (22) includes: A frame (221) is mounted on a housing (1); A light guide tube (222) is mounted on the frame (221) and connected to the circuit board (21). The light guide tube (222) is used to guide the laser emitted by the circuit board (21). A focusing tube (223) is mounted on a frame (221) and connected to a circuit board (21). The focusing tube (223) is used to focus the reflected laser light and guide it onto the circuit board (21). The focusing tube (223) has a conical structure and the diameter of the end near the circuit board (21) is smaller than the diameter of the end away from the circuit board (21).

9. The laser proximity sensor according to claim 1, characterized in that: The housing (1) has multiple sets of locking holes (12), which are isolated from the placement groove (11). An internal threaded sleeve (13) is provided in the locking hole (12) to form an internal threaded hole.

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