Laser sensor

Abstract

A laser sensor comprises a wire rod, a circuit board and a shading fixing base, one end of the wire rod is connected to the circuit board, the circuit board is installed on the shading fixing base, the laser sensor further comprises a shell, the shell is provided with a containing cavity, the shading fixing base is provided with a first clamping part, and the containing cavity is provided with a second clamping part matched with the first clamping part. The shading fixing base is installed in the containing cavity through the first clamping part and the second clamping part. Compared with a common laser sensor needing a fixing support for auxiliary assembly, the shading fixing base is directly assembled and connected in the containing cavity of the shell, an original shading cover and the fixing support are integrated into the shading fixing base capable of being connected with the shell in a clamped mode, the structure is simplified, the production and assembly efficiency is improved, and the manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field especially relates to a laser sensor. BACKGROUND

[0002] The laser sensor can realize automatic induction, when the user approaches a specific product and triggers the inductor on the product, the laser sensor will send out a laser beam and detect the signal reflected back, by analyzing these signals, the inductor can judge the user's action, such as approaching, leaving or kicking, according to the user's action, the inductor can automatically control the function of the product, so as to provide more convenient use experience.

[0003] The current laser sensor includes wire, circuit board, light shielding fixing base, shell, mounting sleeve and fixing support and the like. In the production and assembly process, the light shielding fixing base with the mounted circuit board needs to be first clamped on the fixing support, and then the fixing support needs to be clamped in the inside of the shell, which is relatively troublesome, has low production efficiency and high cost. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the background art, the utility model aims at providing a laser sensor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A laser sensor, comprising wire, circuit board and light shielding fixing base, one end of the wire is connected to the circuit board, the circuit board is installed on the light shielding fixing base, further comprising a shell, the shell is provided with a receiving cavity, the light shielding fixing base is provided with a first clamping part, the receiving cavity is provided with a second clamping part matched with the first clamping part, and the light shielding fixing base is installed in the receiving cavity through the first clamping part and the second clamping part.

[0007] Further, the first clamping part is a first clamping hook, the second clamping part is a first clamping groove, and the first clamping hook comprises a connecting plate, one end of the connecting plate is arranged on the light shielding fixing base, and the other end of the connecting plate is provided with a first hook body clamped on the first clamping groove.

[0008] Further, the receiving cavity is provided with a guide sliding groove matched with the first hook body, and the first hook body is provided with a first guide inclined surface.

[0009] Further, the light shielding fixing base is further provided with a second clamping hook, the second clamping hook is further provided with a second guide inclined surface and an anti-falling part, and the circuit board is provided with a second clamping groove matched with the second clamping hook.

[0010] Further, the light shielding fixing base is provided with at least one positioning column, and the circuit board is provided with a positioning hole matched with the positioning column.

[0011] Further, the light-shielding fixing seat is provided with two positioning columns, and the diameters of the two positioning columns are different.

[0012] Further, the bottom of the accommodating cavity is provided with an anti-overflow glue rib, and the bottom of the light-shielding fixing seat is provided with a position-providing groove matched with the anti-overflow glue rib.

[0013] Further, the light-shielding fixing seat is made of hard plastic material.

[0014] The utility model discloses the beneficial effect is:

[0015] 1. The utility model provides a laser sensor which comprises a wire, a circuit board and a light-shielding fixing seat, one end of the wire is connected to the circuit board, the circuit board is installed on the light-shielding fixing seat, further comprises a shell, the shell is provided with an accommodating cavity, the light-shielding fixing seat is provided with a first clamping part, the accommodating cavity is provided with a second clamping part matched with the first clamping part, and the light-shielding fixing seat is installed in the accommodating cavity through the first clamping part and the second clamping part. Compared with the common laser sensor which needs a fixing support for auxiliary assembly, the light-shielding fixing seat of the utility model is directly assembled and connected in the accommodating cavity of the shell, the original light shield and the fixing support are integrated into the light-shielding fixing seat which can be clamped with the shell, so that the structure is simplified, the production and assembly efficiency is improved, and the manufacturing cost is reduced.

[0016] 2. The utility model provides a laser sensor, and the light-shielding fixing seat is further provided with a second clamping hook, the second clamping hook is further provided with a second guide inclined surface and an anti-falling part, the circuit board is provided with a second clamping groove matched with the second clamping hook, the light-shielding fixing seat is further provided with two positioning columns, the diameters of the two positioning columns are different, and the arrangement of the second clamping hook and the positioning column can ensure the assembly precision of the light spot, the TOF and the light path hole of the light-shielding fixing seat, prevent the circuit board from being assembled reversely, and improve the assembly efficiency.

[0017] 3. The utility model provides a laser sensor, and the bottom of the accommodating cavity is provided with an anti-overflow glue rib, the bottom of the light-shielding fixing seat is provided with a position-providing groove matched with the anti-overflow glue rib, and the cooperation of the anti-overflow glue rib and the position-providing groove can effectively prevent overflow of the light-emitting surface when subsequent sealing glue is filled.

[0018] 4. The utility model provides a laser sensor, and the light-shielding fixing seat is made of hard plastic material, the optical element on the circuit board is stable and controllable in position after assembly, and good light spot quality can be projected. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the utility model embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 It is an exploded view of the laser sensor of the utility model;

[0021] Figure 2 It is a schematic view of the laser sensor of the utility model;

[0022] Figure 3 It is an assembly process drawing without showing the mounting sleeve;

[0023] Figure 4 It is a schematic view of the light-shielding fixing seat and the shell after assembly;

[0024] Figure 5 It is a schematic view of the shell;

[0025] Figure 6 It is a schematic view of the light-shielding fixing seat and the circuit board after assembly;

[0026] Figure 7 It is a schematic view of the light-shielding fixing seat and the circuit board after assembly;

[0027] Figure 8 It is a front vertical sectional view of the laser sensor of the utility model without showing the mounting sleeve;

[0028] Figure 9 It is a side vertical sectional view of the laser sensor of the utility model;

[0029] In the drawings, 10, wire rod; 20, circuit board; 201, second clamping groove; 202, positioning hole; 30, light-shielding fixing seat; 301, first clamping hook; 3011, connecting plate; 3012, first hook body; 3013, first guide inclined surface; 302, first through hole; 303, second through hole; 304, third through hole; 305, second clamping hook; 3051, second guide inclined surface; 3052, anti-falling part; 306, positioning column; 307, accommodation groove; 40, shell; 401, accommodating cavity; 402, first clamping groove; 403, guide sliding groove; 404, anti-overflow glue rib; 50, mounting sleeve; 60, sealing glue. DETAILED DESCRIPTION

[0030] The utility model will be described in detail below. Figures 1-9

[0031] ​A laser sensor, comprising a wire 10, a circuit board 20 and a light-shield fixing seat 30, one end of the wire 10 is connected to the circuit board 20, the circuit board 20 is installed on the light-shield fixing seat 30, further comprising a shell 40, the shell 40 is provided with a receiving cavity 401, the light-shield fixing seat 30 is provided with a first clamping part, the receiving cavity 401 is provided with a second clamping part matched with the first clamping part, and the light-shield fixing seat 30 is installed in the receiving cavity 401 through the first clamping part and the second clamping part. Compared with the common laser sensor which needs a fixing support for auxiliary assembly, the light-shield fixing seat 30 of the utility model is directly assembled and connected in the receiving cavity 401 of the shell 40, the original light shield and the fixing support are integrated into the light-shield fixing seat 30 which can be clamped with the shell 40, the production and assembly efficiency is improved, and the manufacturing cost is reduced.

[0032] Specifically, the other end of the wire 10 is provided with a connector; the circuit board 20 (PCB board) and the light-shield fixing seat 30 are assembled to form a light guide assembly, and the assembly mode is mutual clamping; the circuit board 20 is a component for realizing electrical performance, the terminals on the wire 10 and the circuit board 20 are electrically connected with each other; the circuit board 20 is provided with a laser emitting element, a laser receiving element and an indicator light, the bottom of the light-shield fixing seat 30 is provided with a first through hole 302, a second through hole 303 and a third through hole 304, the first through hole 302 is a signal emitting hole, the second through hole 303 is a signal receiving hole, and the third through hole 304 is a light emitting hole of the indicator light, the laser emitting element of the circuit board 20 emits a signal through the first through hole 302, the laser receiving element of the circuit board 20 receives a light beam emitted after passing through an obstacle through the second through hole 303, and whether the user's foot is located in the sensing area is detected by using the principle of laser ranging; the light emitting hole is convenient for the user to observe the lighting state of the indicator light, so as to know the working state of the current sensing device.

[0033] One end, i.e. the bottom, of the shell 40 is provided with a sensing window (also known as a light-transmitting window) (not shown in the figure), the light-transmitting window can be penetrated by laser, the other end, i.e. the top, of the shell 40 is provided with an opening, the opening is provided with the receiving cavity 401 which is inwardly extended, and the receiving cavity 401 is used for installing the light guide assembly; a decorative ring (not shown in the figure) can be provided outside the shell 40, and plays a decorative role.

[0034] In this embodiment, the first clamping part is the first clamping hook 301, the second clamping part is the first clamping groove 402, and the first clamping hook 301 comprises a connecting plate 3011, one end of the connecting plate 3011 is arranged in the light-shielding fixing seat 30, and the other end of the connecting plate 3011 is provided with a first hook body 3012 which can be clamped in the first clamping groove 402; further, the accommodating cavity 401 is provided with a guide sliding groove 403 which is matched with the first hook body 3012, and the first hook body 3012 is provided with a first guide inclined surface 3013. The first clamping hook 301 is made of a material with a certain elasticity, such as hard plastic, when the light guide assembly is installed in the accommodating cavity 401 of the shell 40, the first hook body 3012 of the light-shielding fixing seat 30 is first slid into the guide sliding groove 403 of the shell 40, and when the light guide assembly is pushed to the bottom of the accommodating cavity 401, the first hook body 3012 buckles the first clamping groove 402. The clamping process is the same as the clamping steps of the fixing bracket and the shell 40 in the prior art, and will not be described in detail in this embodiment.

[0035] In this embodiment, the light-shielding fixing seat 30 is further provided with a second clamping hook 305, the second clamping hook 305 is further provided with a second guide inclined surface 3051 and a anti-falling part 3052, and the circuit board 20 is provided with a second clamping groove 201 which is matched with the second clamping hook 305. Specifically, the second clamping hook 305 is made of a material with a certain elasticity, such as hard plastic, the anti-falling part 3052 is a groove below the second guide inclined surface 3051, first, the circuit board 20 slides downward along the second guide inclined surface 3051, and after sliding to the bottom, the circuit board 20 and the light-shielding fixing seat 30 are clamped through the second clamping hook 305 and the second clamping groove 201 under the rebounding of the second clamping hook 305 and the blocking of the anti-falling part 3052. In addition, other clamping methods or other assembly methods other than clamping between the circuit board 20 and the light-shielding fixing seat 30 (light-shielding cover) in the prior art can also be referred to.

[0036] In this embodiment, the light-shielding fixing seat 30 is provided with at least one positioning column 306, and the circuit board 20 is provided with a positioning hole 202 which is matched with the positioning column 306.

[0037] In this embodiment, the light-shielding fixing seat 30 is provided with two positioning columns 306, and the diameters of the two positioning columns 306 are different. Specifically, the two positioning columns 306 with different diameters play a distinguishing role, preventing the circuit board 20 from being installed in reverse and improving the assembly efficiency.

[0038] In this embodiment, the bottom of the accommodating cavity 401 is provided with a glue overflow prevention rib 404, and the bottom of the light-shielding fixing seat 30 is provided with a giving slot 307 which is matched with the glue overflow prevention rib 404. Specifically, the glue overflow prevention rib 404 is square, and the matching of the square glue overflow prevention rib 404 and the giving slot 307 can effectively prevent the overflow of the sealing glue 60 on the light emitting surface during subsequent sealing.

[0039] In the embodiment, the mounting sleeve 50 is sleeved on the outside of the shell 40. Specifically, the other end of the wire 10 extends to the outside of the shell 40 and the mounting sleeve 50. As shown in the figure, a stepped surface is arranged on the outside of the shell 40, which plays a role of preventing the mounting sleeve 50 from being detached when the mounting sleeve 50 is assembled. Figure 8

[0040] In the embodiment, the light-shielding fixing seat 30 is made of hard plastic material. Specifically, most of the existing light-shielding fixing seats 30 are made of rubber soft glue. However, if the light-shielding fixing seat 30 is made of soft glue material, problems such as unclear boundary of the projected light spot shape, difficulty in operation during production and assembly of the soft glue light-shielding fixing seat 30 and easy misassembly may occur, thereby affecting the function of the product. After the hard plastic material is used, these problems can be avoided. The position of the optical element on the circuit board 20 and the light guide path on the light-shielding fixing seat 30 is stable and controllable after assembly, and good light spot quality can be projected.

[0041] The upper part of the circuit board 20 in the accommodating cavity 401 is filled with sealing glue 60. The sealing glue 60 can be any one of epoxy sealing glue 60, silicone sealing glue 60, polyurethane sealing glue 60, acrylic sealing glue 60 and rubber type sealing glue 60, which is not limited herein. The sealing glue 60 has the following effects: first, it can prevent moisture and dust from entering the circuit board 20 and ensure the stable operation of the circuit board 20; second, it can play a role of sound insulation and heat insulation to a certain extent and improve the overall performance of the laser sensor; third, it can increase the stability of the installation between the light guide assembly and the shell 40.

[0042] Components not mentioned in the embodiment, such as sealing rings, belong to the conventional accessories of the existing laser sensor. The structure, installation position and installation mode thereof refer to the existing technology and common knowledge in the field, which will not be described herein.

[0043] The installation process of the laser sensor is as follows:

[0044] First, the wire 10 is welded on the circuit board 20. The circuit board 20 is clamped on the top of the light-shielding fixing seat 30 through the second clamping hook 305 and the second clamping groove 201. The laser emitting element, the laser receiving element and the indicator light are respectively aligned with the first through hole 302, the second through hole 303 and the third through hole 304 at the bottom of the light-shielding fixing seat 30. Then, the light guide assembly, i.e. the light-shielding fixing seat 30 with the circuit board 20, is clamped in the accommodating cavity 401 of the shell 40. Finally, the sealing glue 60 is poured into the accommodating cavity 401, and the mounting sleeve 50 is sleeved on the outside of the shell 40.

[0045] The laser sensor can be applied to the bathroom field, specifically to intelligent sensing faucets, soap dispensers or toilet products. In addition to the bathroom field, it can also be applied to the fields of environmental monitoring and medical treatment. ​

[0046] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A laser sensor, characterized by The utility model relates to a fixing base for circuit board, which comprises a wire, a circuit board and a fixing base for circuit board, the wire is connected to the circuit board, the circuit board is installed on the fixing base for circuit board, and the fixing base for circuit board is installed in a receiving cavity of a shell through a first clamping part and a second clamping part.

2. A laser sensor as claimed in claim 1, characterized in that The first clamping part is a first clamping hook, the second clamping part is a first clamping groove, the first clamping hook comprises a connecting plate, one end of the connecting plate is arranged on the fixing base for circuit board, and the other end of the connecting plate is provided with a first hook body capable of being clamped in the first clamping groove.

3. A laser sensor as claimed in claim 2, characterized in that The receiving cavity is provided with a guide sliding slot matched with the first hook body, and the first hook body is provided with a first guide inclined surface.

4. A laser sensor as claimed in claim 1, characterized in that The fixing base for circuit board is further provided with a second clamping hook, the second clamping hook is further provided with a second guide inclined surface and an anti-falling part, and the circuit board is provided with a second clamping groove matched with the second clamping hook.

5. A laser sensor as claimed in claim 1, characterized in that The fixing base for circuit board is provided with at least one positioning column, and the circuit board is provided with a positioning hole matched with the positioning column.

6. A laser sensor as claimed in claim 5, characterized in that The fixing base for circuit board is provided with two positioning columns, and the diameters of the two positioning columns are different.

7. A laser sensor as claimed in claim 1, characterized in that The bottom of the receiving cavity is provided with a glue overflow prevention rib, and the bottom of the fixing base for circuit board is provided with a gap slot matched with the glue overflow prevention rib.

8. A laser sensor as claimed in claim 1, characterized in that The fixing base for circuit board is made of hard plastic material.

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