Inductive switch

Abstract

The utility model relates to the technical field of inductive switches, and discloses an inductive switch. The switch comprises a switch shell, an internal PCB and a wiring terminal, the wiring terminal comprises a wire connecting part and an elastic part, the elastic part is of an annular structure formed by encircling a first straight plate part, a second straight plate part, a third straight plate part and an arc-shaped contact part, and the arc-shaped contact part is in sliding contact with the surface of the first straight plate part. According to the structure, the wiring terminal is in elastic contact connection with the PCB through the elastic part. The connection stability of the inductive switch is greatly improved, the annular high-elasticity characteristic of the elastic part can resist vibration and temperature change influences, and connection looseness and poor contact are avoided; the service life is obviously prolonged, and the arc-shaped contact part and the straight plate part I slide relatively to release pressure when being pressed, so that irreversible deformation of the elastic part is prevented; and the elastic contact connection replaces welding, so that the later operation process is simplified, and the use convenience and the overall operation efficiency of the equipment are improved.

Description

Technical Field

[0001] This utility model relates to the field of inductive switch technology, specifically an inductive switch. Background Technology

[0002] In the existing field of inductive switch technology, an inductive switch typically includes a switch housing, a PCB board mounted inside the switch housing, and terminals for connecting external wiring. As a key component connecting external wires to the PCB board, the stability of the connection between the terminals and the PCB board plays a crucial role in the performance of the inductive switch.

[0003] Traditional terminal block connections to PCB boards have several drawbacks. Common connection methods often fail to guarantee long-term stable electrical connections. For example, rigid connections are prone to loosening and poor contact when exposed to external vibrations or temperature changes, thus affecting the normal operation of the inductive switch and reducing its reliability. While connections relying on soldering can ensure a certain degree of stability, they are more difficult to maintain and repair, and repairs are complex if solder joints fail.

[0004] Meanwhile, existing terminal blocks do not make reasonable use of their own elasticity in their structural design. When subjected to large external forces, the elastic components are prone to irreversible deformation, resulting in the inability to maintain a good contact with the PCB board, which greatly affects the service life and connection stability of the inductive switch. In view of this, developing an inductive switch that can overcome the above defects, achieve a stable and reliable connection between the terminal block and the PCB board, and has a long service life has become an urgent problem to be solved in this field. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides an inductive switch.

[0006] The technical solution adopted by this utility model is: an inductive switch, including a switch housing, a PCB board installed inside the switch housing, and a terminal block connected to the PCB board. The terminal block is connected to the terminal hole of the switch housing. The terminal block includes a wire connection part and an elastic part. The elastic part and the contact point of the PCB board are connected by the elasticity of the elastic part.

[0007] The elastic part includes a straight plate part one, a straight plate part two, a straight plate part three, and an arc-shaped contact part. The straight plate part one and the straight plate part two are connected by the arc-shaped part one, and the straight plate part two and the straight plate part three are connected by the arc-shaped part two. The straight plate part one, the straight plate part two, the straight plate part three, and the arc-shaped contact part form a ring structure around each other.

[0008] The arc-shaped contact portion is in sliding contact with one surface of the straight plate portion.

[0009] Furthermore, under no external force, the included angle α between the first straight plate section and the second straight plate section is 35-50 degrees, and the included angle b between the third straight plate section and the first straight plate section is 55-75 degrees.

[0010] Furthermore, the end of the arc-shaped contact portion extends to a straight plate portion four, and under no external force, the angle c between the straight plate portion four and the straight plate portion one is 5-15 degrees.

[0011] Furthermore, the straight plate portion has a connecting rocker plate that tilts and curves away from the arc-shaped contact portion, and the connecting rocker plate and the limiting step in the terminal hole mutually limit each other.

[0012] Furthermore, the wire connection part includes a wire clamping part and a wiring part. The wire clamping part has wire clamping plates symmetrically arranged on both sides, and the wiring part has wiring holes.

[0013] Furthermore, the switch housing includes an outer casing and a cover that fits onto the outer casing. A positioning sleeve is fitted inside the outer casing. The positioning sleeve has connection openings on both sides. The cover has elastic hooks on both sides that engage with the connection openings.

[0014] Furthermore, the inner walls of the positioning sleeve and the cover are provided with positioning slots, and the PCB board is inserted and installed in the positioning slots.

[0015] The beneficial effects of this utility model are:

[0016] 1. Significantly Improved Connection Stability: By incorporating a ring-shaped elastic portion on the terminal block, the high elasticity of this portion allows for a highly stable contact connection with the PCB board contacts. Even when the inductive switch encounters adverse factors such as external vibrations and temperature changes during actual use, this elastic contact connection method, compared to traditional rigid connections, effectively avoids connection loosening caused by vibrations and poor contact due to thermal expansion and contraction caused by temperature changes. This ensures the inductive switch can always operate normally, greatly enhancing the overall reliability of the inductive switch.

[0017] 2. Significantly Extended Service Life: Because the arc-shaped contact portion in the elastic section slides against the surface of the straight plate without external force, when the elastic section is compressed, relative sliding occurs between the arc-shaped contact portion and the straight plate, reducing the ring size and providing a buffering effect. This ingenious design automatically releases the pressure on the elastic section. In this way, the elastic section can withstand relatively large pressure without irreversible deformation, thus maintaining good contact with the PCB board, significantly extending the service life of the inductive switch, reducing equipment replacement frequency, and saving operating costs.

[0018] 3. Enhanced Maintenance and Repair: Unlike traditional inductive switches that use soldering to connect terminals and PCBs, this product employs a flexible contact connection between the terminals and PCB. This eliminates the need for complex procedures during maintenance and repair, as is common with soldered connections. Technicians can more easily inspect, replace, or repair components, significantly improving maintenance efficiency, reducing downtime, and enhancing usability and overall operational efficiency.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is an exploded view of the present invention.

[0022] Figure 3 This is a schematic diagram of the PCB board and the wiring terminals.

[0023] Figure 4 This is a cross-sectional schematic diagram of the present invention.

[0024] Figure 5 This is a schematic diagram of the connection terminal structure.

[0025] Figure 6 This is a side view of the connection terminal. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] This utility model provides an inductive switch.

[0029] In this embodiment, refer to Figure 1-6 The inductive switch includes a switch housing 1, a PCB board 2 installed inside the switch housing 1, and a terminal block 3 connected to the PCB board 2. The terminal block 3 is connected to the terminal hole 4 in the switch housing. The terminal block includes a wire connection part 5 and an elastic part 6. The elastic part and the contact point 26 of the PCB board are connected by the elasticity of the elastic part.

[0030] The elastic part includes a straight plate part 7, a straight plate part 8, a straight plate part 3, and an arc-shaped contact part 10. The straight plate part 7 and the straight plate part 2 are connected by an arc-shaped part 11, and the straight plate part 2 and the straight plate part 3 are connected by an arc-shaped part 2 12. The straight plate part 1, the straight plate part 2, the straight plate part 3, and the arc-shaped contact part form a ring structure.

[0031] The arc-shaped contact portion is in sliding contact with one surface of the straight plate portion.

[0032] In the above technical solution, the elastic part of the terminal block uses a ring structure design. Utilizing the high elasticity of the ring, the arc-shaped contact part slides against one surface of the straight plate when there is no external force. When pressure is applied, the elastic part deforms as a whole, and the arc-shaped contact part slides relative to the straight plate to release the pressure, maintaining the performance of the elastic part and ensuring a stable connection with the PCB board contacts. Simultaneously, the wire connection part connects external wires, working in conjunction with the elastic part to complete the complete circuit connection function of the inductive switch. This achieves a stable elastic connection between the terminal block and the PCB board with automatic pressure release, significantly improving connection stability and service life.

[0033] Specifically, under no external force, the included angle α between the first straight plate part and the second straight plate part is 35-50 degrees, and the included angle b between the third straight plate part and the first straight plate part is 55-75 degrees.

[0034] In this embodiment, the angle α between straight plate part one and straight plate part two (35-50 degrees) and the angle b between straight plate part three and straight plate part one (55-75 degrees) determine the deformation mode and degree of the elastic ring structure under pressure. Within this angle range, the elastic part can reasonably distribute the pressure while ensuring sufficient elastic recovery force, ensuring that the contact pressure with the PCB board contact point is always within a suitable range, thereby improving the stability and reliability of the connection.

[0035] In addition, such as Figure 3 As shown, due to the angle between the second straight plate and the first straight plate, the surface of the second straight plate forms an inclined surface. When the PCB board is inserted from the outer shell, the end of the PCB board acts on the inclined surface of the second straight plate, which in turn squeezes the elastic cloth. After being squeezed, the arc-shaped contact part of the elastic cloth slides relative to the surface of the first straight plate, reducing the ring structure of the elastic part. The elastic part naturally generates elastic force, and can continuously release the elastic force while playing the role of buffering pressure.

[0036] Specifically, the end of the arc-shaped contact portion extends to a straight plate portion four 13, and under no external force, the angle c between the straight plate portion four 13 and the straight plate portion one is 5-15 degrees.

[0037] In this embodiment, the straight plate part four serves as a limit to prevent the arc-shaped contact part from popping out and detaching from the straight plate part one.

[0038] Specifically, the straight plate has a connecting rocker plate 14 that tilts and curves away from the arc-shaped contact portion, and the connecting rocker plate 14 is mutually limited by the limiting step 15 in the terminal hole.

[0039] In this embodiment, the connecting rocker and the limiting step mutually limit each other, ensuring that the wiring terminal is installed in the terminal hole accurately and stably, thereby improving the overall structural stability.

[0040] Specifically, the wire connection part includes a wire clamping part 16 and a wiring part 17. The wire clamping part is symmetrically provided with wire clamping pieces 18 on both sides, and the wiring part is provided with wiring holes 19.

[0041] In this embodiment, the design of the clamping part and the wiring part of the wire connection part facilitates and enables a reliable connection with external wires quickly and easily.

[0042] Specifically, the switch housing includes an outer casing 20 and a cover 21 that covers the outer casing. A positioning sleeve 22 is fitted inside the outer casing. The positioning sleeve has connection openings 23 on both sides. The cover has elastic hooks 24 on both sides that engage with the connection openings.

[0043] In this embodiment, the outer casing provides a basic protective and support frame. The cover engages with the connection openings on both sides of the positioning sleeve via elastic hooks, enabling quick and convenient installation and removal, facilitating the assembly and maintenance of internal components. The positioning sleeve serves two purposes: firstly, it positions internal components (such as PCB boards); secondly, it works in conjunction with the cover to enhance the overall structural strength of the outer casing, protecting internal components such as PCB boards and wiring terminals from external impacts and damage.

[0044] Specifically, the inner wall of the positioning sleeve and the cover is provided with a positioning slot 25, and the PCB board is inserted and installed in the positioning slot 25.

[0045] In this embodiment, the positioning slot ensures that the PCB board is installed in an accurate and stable position, which is beneficial to the electrical connection and signal transmission between the components.

[0046] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A proximity switch, comprising a switch housing, a PCB board mounted inside the switch housing, and terminals connected to the PCB board, wherein the terminals are connected to terminal holes in the switch housing, characterized in that: The terminal block includes a wire connection part and an elastic part, and the elastic part is connected to the PCB board contact point by means of the elasticity of the elastic part. The elastic part includes a straight plate part one, a straight plate part two, a straight plate part three, and an arc-shaped contact part. The straight plate part one and the straight plate part two are connected by the arc-shaped part one, and the straight plate part two and the straight plate part three are connected by the arc-shaped part two. The straight plate part one, the straight plate part two, the straight plate part three, and the arc-shaped contact part form a ring structure around each other. The arc-shaped contact portion is in sliding contact with one surface of the straight plate portion.

2. The inductive switch according to claim 1, characterized in that: Without external force, the included angle α between the first straight plate section and the second straight plate section is 35-50 degrees, and the included angle b between the third straight plate section and the first straight plate section is 55-75 degrees.

3. The inductive switch according to claim 1 or 2, characterized in that: The end of the arc-shaped contact portion extends to a straight plate portion four. Under no external force, the angle c between the straight plate portion four and the straight plate portion one is 5-15 degrees.

4. The inductive switch according to claim 1, characterized in that: The straight plate has a connecting rocker plate that tilts and curves away from the arc-shaped contact portion, and the connecting rocker plate is mutually limited by the limiting step in the terminal hole.

5. The inductive switch according to claim 1, characterized in that: The wire connection part includes a wire clamping part and a wiring part. The wire clamping part has wire clamping plates symmetrically arranged on both sides, and the wiring part has wiring holes.

6. The inductive switch according to claim 1, characterized in that: The switch housing includes an outer casing and a cover that fits onto the outer casing. A positioning sleeve is fitted inside the outer casing. The positioning sleeve has connection openings on both sides. The cover has elastic hooks on both sides that engage with the connection openings.

7. The inductive switch according to claim 6, characterized in that: The inner walls of the positioning sleeve and the cover are provided with positioning slots, and the PCB board is inserted and installed in the positioning slots.

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