Anti-interference fully-sealed photoelectric switch

Abstract

The utility model provides an anti-interference fully-sealed optoelectronic switch, which comprises a plastic shell, a pin sleeve, a circuit module, a rear cover, a lead, a metal shell and pouring sealant, the pin sleeve and the circuit module are arranged in the plastic shell, the lead passes through the rear cover and is welded with the circuit module, the circuit module is packaged in the plastic shell by the pouring sealant, and the metal shell is arranged in the plastic shell. The rear cover is placed in an opening of the plastic shell, and the plastic shell is sleeved with the metal shell; the pin sleeve is matched with the interior of the shell to fix the circuit module; the plastic shell, the metal shell and the rear cover are fastened through the pins; full sealing of the product can be achieved by conducting glue pouring packaging in the shell, the metal shell is designed outside to be fixed, the installation strength and the environment adaptability of the product are improved, and meanwhile the anti-interference capacity of the product can be enhanced after the metal shell and the grounding wire are grounded. The problems of poor sealing performance, poor environment resistance, low installation strength and weak anti-interference capability of a photoelectric switch are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of optoelectronic devices, especially relates to a anti -interference full -seal photoelectric switch. BACKGROUND

[0002] The principle of photoelectric switch is based on photoelectric effect, emits light speed through light source, and utilizes the light intensity change of receiver detection light speed to sense the existence or change of object, realizes the function that the physical signal of object change is converted into electric signal.

[0003] Limited to the characteristic that photoelectric switch needs to emit light and receive light, the position of emitting light and receiving light needs to be designed with a through slot, resulting in that most of the slot type photoelectric switches on the market are non-sealed structure, a small part adopts transparent plastic material to design to achieve sealing effect, but the plastic material is poor in environmental performance, difficult to form, low in installation strength, and the plastic material cannot protect the internal devices of the product well under space electromagnetic interference.

[0004] The Chinese patent with publication number CN221127268U discloses a slot type photoelectric switch assembly structure, the photoelectric switch is provided with L-shaped infrared emitter and infrared receiver on both sides of the opening slot top, so that the photoelectric switch no longer needs processes such as threads or soldering for fixing and connecting during production, and meanwhile, the overall component parts are less, effectively improving production efficiency and reducing production cost.

[0005] However, the photoelectric switch has the following problems:

[0006] 1) The internal components are not fixed firmly and are prone to shaking;

[0007] 2) Poor sealing;

[0008] 3) Internal devices are prone to electromagnetic interference. UTILITY MODEL CONTENTS

[0009] To solve the above problems, the utility model provides a anti -interference full -seal photoelectric switch, including: plastic shell, pin sleeve, circuit module, back cover, wire, metal shell and pouring sealant, pin sleeve and circuit module are loaded into plastic shell, wire passes through back cover and is welded with circuit module, pouring sealant encapsulates circuit module in plastic shell, back cover is put into the opening place of plastic shell, plastic shell is covered with metal shell.

[0010] The circuit module comprises a PCB board, a resistor, a capacitor, a photoelectric device and a signal processing chip.

[0011] The pin sleeve and the shell cooperate to fix the photoelectric device and the PCB board in the circuit module.

[0012] The plastic shell is provided with an emitting surface and a receiving surface, and the emitting surface and the receiving surface adopt a light surface; the plastic shell adopts a light-transmitting material.

[0013] The plastic shell is formed with a "U" shape, and the emitting surface and the receiving surface are arranged at the two arms of the plastic shell.

[0014] The metal shell is provided with openings at the emitting surface and the receiving surface of the plastic shell.

[0015] The metal shell is connected with the grounding wire.

[0016] The metal shell is provided with mounting ears on the left and right sides, and the mounting ears are provided with mounting holes.

[0017] The rear cover is fixed with the plastic shell through a buckle structure.

[0018] The rear cover is fixed with the plastic shell through a buckle structure.

[0019] The utility model has the following beneficial effects:

[0020] 1) The circuit module in the plastic shell is fixed through the pin sleeve to prevent the internal components from shaking;

[0021] 2) The product sealing performance is improved through the glue filling and packaging in the shell;

[0022] 3) The anti-interference performance of the product is improved after the metal shell is grounded. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the main view cross-sectional structure schematic diagram of the utility model.

[0024] In the drawing: 1-plastic shell; 2-metal shell; 3-pin sleeve; 4-circuit module; 5-rear cover; 6-glue filling, 7-pint; 8-wire. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] Embodiment 1

[0027] Please refer to Figure 1The utility model provides a technical scheme: an anti -interference full -seal photoelectric switch, include: plastic shell 1, pin sleeve 3, circuit module 4, back cover 5, wire 8, metal shell 2 and pouring sealant 6, pin sleeve 3 and circuit module 4 are loaded into plastic shell 1, wire 8 passes through back cover 5 and is welded with circuit module 4, pouring sealant 6 encapsulates circuit module 4 in plastic shell 1, back cover 5 is put into plastic shell 1 opening, plastic shell 1 is set on metal shell 2. Pouring sealant 6 improves the leakproofness of circuit module 4.

[0028] Circuit module 4 includes: PCB board, resistance, electric capacity, photoelectric device, signal processing chip.

[0029] Pin sleeve 3 and shell inside cooperation fixed photoelectric device and PCB board in circuit module 4. Prevent circuit module 4 from shaking and falling off.

[0030] Plastic shell 1 sets up emission surface and receiving surface, and the emission surface and the receiving surface adopt light surface; the plastic shell 1 adopts light transmission material.

[0031] Plastic shell 1 forms "U" outside, and the emission surface and the receiving surface are arranged at the two arms of the plastic shell 1 respectively.

[0032] Metal shell 2 is provided with openings at the emission surface and the receiving surface of the plastic shell 1.

[0033] It also includes a ground wire, and the metal shell 2 is connected to the ground wire. The metal shell can be grounded through its own grounding or the connection of the ground wire to reduce internal electromagnetic interference.

[0034] The metal shell 2 is provided with mounting ears on the left and right sides, and mounting holes are arranged on the mounting ears. This facilitates the installation of the product.

[0035] The back cover 5 is fixed to the plastic shell 1 through a buckle structure.

[0036] It also includes a pin 7, and the plastic shell 1, the metal shell 2, and the back cover 5 are fastened through the pin 7.

[0037] Working principle: the photoelectric switch has a "U" shape, and the emission surface and the receiving surface are located at the two arms of the plastic shell. When the photoelectric switch is used, the circuit module 4 works, the photoelectric device emits light signals from the emission surface, the receiving surface receives the light signals, and an optical axis is formed between the emission surface and the receiving surface. When the detected object passes through the U-shaped groove and blocks the optical axis, the circuit module 4 detects the target object according to the light intensity received by the photoelectric device in the receiving surface or whether there is any light. The wire 8 is used for power supply and signal transmission of the photoelectric switch.

[0038] The utility model discloses, through in the glue filling packaging of shell can realize the full sealing of product, external design metal shell fixed, improve the installation strength and environmental adaptability of product, after the grounding of metal shell and ground wire, can enhance the anti -interference ability of product, solved the poor tightness of photoelectric switch, poor environmental performance, low installation strength, weak anti -interference ability problem.

[0039] The above disclosed is only the specific embodiment of the utility model, but, the utility model is not limited to this, any person skilled in the art can think of the change and should fall into the protection scope of the utility model.

Claims

1. An anti-interference, fully sealed photoelectric switch, comprising: The plastic shell (1), pin sleeve (3), circuit module (4), back cover (5) and wire (8) are characterized in that they also include a metal shell (2) and potting compound (6). The pin sleeve (3) and the circuit module (4) are installed in the plastic shell (1). The wire (8) passes through the back cover (5) and is soldered to the circuit module (4). The potting compound (6) encapsulates the circuit module (4) in the plastic shell (1). The back cover (5) is placed into the opening of the plastic shell (1). The plastic shell (1) is covered with the metal shell (2).

2. The anti-interference, fully sealed photoelectric switch according to claim 1, characterized in that, The circuit module (4) includes: PCB board, resistor, capacitor, optoelectronic device, and signal processing chip.

3. The anti-interference, fully sealed photoelectric switch according to claim 2, characterized in that, The pin sleeve (3) cooperates with the inside of the outer shell to fix the optoelectronic devices and PCB board in the circuit module (4).

4. The anti-interference, fully sealed photoelectric switch according to claim 1, characterized in that, The plastic shell (1) is provided with a emitting surface and a receiving surface, and the emitting surface and the receiving surface are smooth; the plastic shell (1) is made of a light-transmitting material.

5. The anti-interference, fully sealed photoelectric switch according to claim 4, characterized in that, The plastic shell (1) is U-shaped, with the transmitting and receiving surfaces respectively located on the two arms of the plastic shell (1).

6. The anti-interference, fully sealed photoelectric switch according to claim 4, characterized in that, The metal casing (2) has openings at the transmitting and receiving surfaces of the plastic casing (1).

7. The anti-interference, fully sealed photoelectric switch according to claim 1, characterized in that, It also includes a grounding wire, to which the metal casing (2) is connected.

8. The anti-interference, fully sealed photoelectric switch according to claim 1, characterized in that, The metal casing (2) has mounting ears on both the left and right sides, and mounting holes are provided on the mounting ears.

9. The anti-interference, fully sealed photoelectric switch according to claim 1, characterized in that, The back cover (5) and the plastic shell (1) are fixed by a snap-fit ​​structure.

10. The anti-interference, fully sealed photoelectric switch according to claim 1, characterized in that, It also includes pins (7), by which the plastic shell (1), metal shell (2) and back cover (5) are fastened.

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