Contact sensor with detachable structure

Abstract

The utility model provides a contact type sensor with a detachable structure, which is provided with an outer shell, a through hole is arranged in the outer shell, an insulating fixing column is arranged in the through hole in the outer shell, the insulating fixing column is detachably connected with the outer shell, a through hole is arranged in the insulating fixing column, and the insulating fixing column is provided with a through hole. An induction contact is fixedly arranged at the front end of an inner through hole of the insulation fixing column, the induction contact and the insulation fixing column are detachably connected, a positive wire is fixedly connected to the induction contact, a groove is formed in the rear end of the outer shell, and a negative wire is fixedly connected into the groove. The technical problems that in an existing contact type sensor, an outer shell and an insulation fixing column are fixed in an interference fit mode or a high-temperature pressing mode, the insulation fixing column and an induction contact are fixed in an interference fit mode or a high-temperature pressing mode, and when the outer shell, the insulation fixing column or the induction contact of the sensor breaks down, fault parts cannot be replaced independently are solved. The utility model can be widely applied to contact sensors.

Description

Technical Field

[0001] The utility model relates to a contact sensor, in particular to a contact sensor with a detachable structure. Background Art

[0002] A contact sensor directly obtains the signal of the measured object through physical contact, and has the characteristics of low cost, high precision, wide application, etc., and is an indispensable monitoring device in many industries.

[0003] In the existing contact sensors, the connection methods between the outer housing and the insulating fixing column and between the insulating fixing column and the sensing contact are usually fixed by interference fit or high-temperature pressing. When a fault occurs in the outer housing, insulating fixing column or sensing contact of the sensor, the faulty parts cannot be replaced individually, and only the whole set of contact sensors can be replaced, increasing the input cost. Moreover, the replaced contact sensors still have intact parts and can continue to be used, resulting in unnecessary waste. Summary of the Utility Model

[0004] In view of the above technical problems, the utility model provides a contact sensor with a detachable structure. In this contact sensor with a detachable structure, the connection between the outer housing and the insulating fixing column and the connection between the insulating fixing column and the sensing contact respectively adopt a detachable fixing method. When a fault occurs in the outer housing, insulating fixing column or sensing contact of the sensor, only the corresponding faulty component needs to be replaced, reducing the input cost and avoiding unnecessary waste.

[0005] To this end, the technical solution of the utility model is a contact sensor with a detachable structure, which is provided with an outer housing. A through hole running through the outer housing along its length direction is arranged inside the outer housing. An insulating fixing column is arranged in the through hole inside the outer housing. The insulating fixing column and the outer housing are detachably connected. A through hole running through the insulating fixing column along its length direction is arranged inside the insulating fixing column. A sensing contact is fixedly arranged at the front end position of the through hole inside the insulating fixing column. The sensing contact and the insulating fixing column are detachably connected. The frontmost position of the sensing contact extends beyond the frontmost position of the outer housing. A positive wire is fixedly connected to the sensing contact. A groove is arranged at the rear end part of the outer housing, and a negative wire is fixedly connected inside the groove.

[0006] Preferably, the insulating fixing post consists of a front supporting section of the insulating fixing post and a rear connecting section of the insulating fixing post. The front supporting section of the insulating fixing post is located at the front end position of the insulating fixing post, and the rear connecting section of the insulating fixing post is located at the rear end position of the insulating fixing post. The outer diameter dimension of the front supporting section of the insulating fixing post is larger than the dimension of the rear connecting section of the insulating fixing post. The front supporting section of the insulating fixing post is located at the outer position of the front end of the outer housing. There is a shoulder between the front supporting section of the insulating fixing post and the rear connecting section of the insulating fixing post. The shoulder is axially fixedly connected to the front end of the outer housing. The outer circumference of the rear connecting section of the insulating fixing post is detachably connected to the inner circumference of the outer housing.

[0007] Preferably, a chamfer is provided at the connection between the inner circumferential surface of the through hole inside the insulating fixing post and the rear end face of the insulating fixing post;

[0008] A chamfer is provided at the connection between the groove at the rear end of the outer housing and the rear end face of the outer housing.

[0009] Preferably, an external thread is provided on the outer circumference of the rear connecting section of the insulating fixing post, and an internal thread is provided on the inner surface of the through hole on the outer housing. The rear connecting section of the insulating fixing post and the outer housing are fixedly locked by threads;

[0010] An external thread is provided on the outer circumference of the induction contact, and an internal thread is provided on the inner surface of the through hole on the insulating fixing post. The induction contact and the insulating fixing post are fixedly locked by threads.

[0011] Preferably, an external thread is provided on the outer circumference of the outer housing. The front position of the external thread extends to the foremost position of the outer housing, and the rear position of the external thread extends to a position close to the rearmost position of the outer housing;

[0012] A locking nut is threadedly connected to the external thread.

[0013] Preferably, the number of locking nuts is two.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. For this contact sensor with a detachable structure, a detachable fixing method is respectively adopted between the outer housing and the insulating fixing post and between the insulating fixing post and the induction contact. When a failure occurs in the outer housing, insulating fixing post or induction contact of the sensor, only the corresponding faulty component needs to be replaced, which reduces the input cost and avoids unnecessary waste.

[0016] 2. By providing chamfers at the connection between the inner circumferential surface of the through-hole inside the insulating fixing post and the rear end face of the insulating fixing post, and at the connection between the groove at the rear end of the outer housing and the rear end face of the outer housing, the two chamfers can effectively prevent the positive and negative lead wires from contacting the rear connection section of the insulating fixing post and the outer housing. When the positive and negative lead wires shake frequently, crease damage or even breakage may occur, affecting the normal use of the contact sensor. Description of the Drawings

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is another perspective view of the present utility model;

[0019] Figure 3 is the front view of the present utility model;

[0020] Figure 4 is the present utility model Figure 3 sectional view taken along line D-D in;

[0021] Figure 5 is a perspective view of the insulating fixing post in the present utility model;

[0022] Figure 6 is the present utility model Figure 4 detail view of portion E in.

[0023] Explanation of the symbols in the drawings:

[0024] 1. Outer housing; 2. Positive lead wire; 3. Inductive contact; 4. Locking nut; 6. Insulating fixing post; 601. Front support section of the insulating fixing post; 602. Rear connection section of the insulating fixing post; 7. Negative lead wire; 8. External thread; 10. Shoulder; 11. Chamfer. Detailed Embodiment

[0025] The following further describes the present utility model in conjunction with embodiments.

[0026] Through Figures 1-6 It can be seen that this contact sensor with a detachable structure is provided with an outer housing 1. A through-hole running through the outer housing 1 along its length direction is provided inside the outer housing 1. An insulating fixing post 6 is provided in the through-hole inside the outer housing 1. The insulating fixing post 6 and the outer housing 1 are detachably connected, enabling quick disassembly and assembly of the insulating fixing post 6 and the outer housing 1, facilitating the repair and replacement of the insulating fixing post 6 or the outer housing 1.

[0027] The interior of the insulating fixed column 6 is provided with a through hole penetrating along the length direction of the insulating fixed column 6. At the front end position of the internal through hole of the insulating fixed column 6, an induction contact 3 is fixedly arranged. The induction contact 3 and the insulating fixed column 6 are detachably connected, which can realize the quick disassembly and assembly of the induction contact 3 and the insulating fixed column 6, facilitating the maintenance and replacement of the induction contact 3 or the insulating fixed column 6.

[0028] The foremost position of the induction contact 3 extends beyond the foremost position of the insulating fixed column 6, and the foremost position of the induction contact 3 also extends beyond the foremost position of the outer housing 1. This structural design can, on the premise of ensuring that the front end of the induction contact 3 can be normally touched, avoid knocking and damaging the insulating fixed column 6 and the outer housing 1.

[0029] A positive wire 2 is fixedly connected to the induction contact 3. A groove is provided at the rear end portion of the outer housing 1, and a negative wire 7 is fixedly connected inside the groove. The other ends of the positive wire 2 and the negative wire 7 respectively extend to the outside of the sensor, facilitating the wiring installation of the sensor.

[0030] The insulating fixed column 6 is composed of an insulating fixed column front-end support section 601 and an insulating fixed column rear-end connection section 602. The insulating fixed column front-end support section 601 is located at the front end position of the insulating fixed column 6, and the insulating fixed column rear-end connection section 602 is located at the rear end position of the insulating fixed column 6. The outer diameter dimension of the insulating fixed column front-end support section 601 is larger than that of the insulating fixed column rear-end connection section 602. The insulating fixed column front-end support section 601 is located outside the front end of the outer housing 1. An axial shoulder 10 is provided between the insulating fixed column front-end support section 601 and the insulating fixed column rear-end connection section 602, and the axial shoulder 10 is axially fixedly connected to the front end portion of the outer housing 1, thereby realizing both axial locking and radial locking between the insulating fixed column 6 and the outer housing 1, and further increasing the connection stability between the insulating fixed column 6 and the outer housing 1.

[0031] The outer circumference of the insulating fixed column rear-end connection section 602 and the inner circumference of the outer housing 1 are detachably connected.

[0032] At the connection position between the inner circumferential surface of the through hole inside the insulating fixed column 6 and the rear-end end face of the insulating fixed column 6, a chamfer 11 is provided. At the connection position between the groove at the rear end portion of the outer housing 1 and the rear-end end face of the outer housing 1, a chamfer 11 is provided.

[0033] The two chamfers 11 can effectively avoid the contact positions of the positive and negative wires with the insulating fixed column rear-end connection section 602 and the outer housing 1 from having crease damage or even breakage when the positive and negative wires shake frequently, affecting the normal use of the sensor.

[0034] The outer circumference of the rear connection section 602 of the insulating fixed column is provided with an external thread, and the inner surface of the through hole on the outer housing 1 is provided with an internal thread. The rear connection section 602 of the insulating fixed column and the outer housing 1 are locked and fixed by threads, which can realize the quick disassembly and assembly of the insulating fixed column 6 and the outer housing 1, facilitating the repair and replacement of the insulating fixed column 6 or the outer housing 1.

[0035] The outer circumference of the induction contact 3 is provided with an external thread, and the inner surface of the through hole on the insulating fixed column 6 is provided with an internal thread. The induction contact 3 and the insulating fixed column 6 are locked and fixed by threads, which can realize the quick disassembly and assembly of the induction contact 3 and the insulating fixed column 6, facilitating the repair and replacement of the induction contact 3 or the insulating fixed column 6.

[0036] At the same time, when the front end of the induction contact 3 is subjected to contact collision for a long time, the dimension from the front end position of the induction contact 3 to the front end support section 601 of the insulating fixed column will gradually shorten. At this time, only need to rotate the induction contact 3, and under the action of the thread, screw the induction contact 3 outwards, then it can continue to be used normally without directly replacing the induction contact 3, effectively reducing the input cost.

[0037] The outer circumference of the outer housing 1 is provided with an external thread 8. The front end position of the external thread 8 extends to the foremost position of the outer housing 1, and the rear end position of the external thread 8 extends to a position close to the rearmost end of the outer housing 1. A lock nut 4 is threadedly connected to the external thread 8.

[0038] Extending the front end position of the external thread 8 to the foremost position of the outer housing 1 can facilitate the sensor to be screwed into the designated mounting hole through the external thread 8 on the outer circumference of the outer housing 1, with convenient and quick operation.

[0039] Positioning the rear end position of the external thread 8 near the rear end face of the outer housing 1 can prevent the lock nut 4 from falling off from the rear end of the outer housing 1. If the external thread 8 runs through the entire circumferential surface of the outer housing 1, the lock nut 4 is very likely to fall off from the rear end of the outer housing 1. Therefore, a part of the rear end face of the outer housing 1 is reserved without threads.

[0040] When the sensor is screwed into the designated mounting hole through the external thread 8, the lock nut 4 is used to lock the periphery of the mounting hole, so as to realize the mutual locking and fixing among the periphery of the mounting hole, the lock nut 4, and the outer housing 1, ensuring the stability of the sensor installation.

[0041] The number of lock nuts 4 is two. When locking, using the two lock nuts 4 to lock each other can further increase the stability of the sensor installation, avoiding the situation of the sensor shaking, loosening or even falling off.

[0042] For the contact sensor with a detachable structure, a detachable fixing method is adopted between the outer housing and the insulating fixing column, and between the insulating fixing column and the induction contact respectively. When a fault occurs in the outer housing, insulating fixing column or induction contact of the sensor, only the corresponding faulty component needs to be replaced, reducing the input cost and avoiding unnecessary waste.

[0043] However, the above are only specific embodiments of the present utility model, and the scope of implementation of the present utility model cannot be limited thereby. Therefore, the replacement of equivalent components or equivalent changes and modifications made according to the scope of patent protection of the present utility model shall still fall within the scope covered by the claims of the present utility model.

Claims

1. A contact sensor with a detachable structure, characterized in that: An outer shell is provided, wherein a through hole penetrating along the length direction of the outer shell is provided inside the outer shell, an insulating fixing column is provided in the through hole inside the outer shell, the insulating fixing column and the outer shell are detachably connected, a through hole penetrating along the length direction of the insulating fixing column is provided inside the insulating fixing column, a sensing contact is fixed at the front end position of the internal through hole of the insulating fixing column, the sensing contact and the insulating fixing column are detachably connected, and the front end position of the sensing contact exceeds the front end position of the outer shell; The induction contact is fixedly connected with a positive electrode wire, and the rear end of the outer shell is provided with a groove, and the negative electrode wire is fixedly connected in the groove.

2. The touch sensor with a detachable structure according to claim 1, characterized in that: The insulating fixing column is composed of a front end support section of the insulating fixing column and a rear end connecting section of the insulating fixing column. The front end support section of the insulating fixing column is located at the front end position of the insulating fixing column, and the rear end connecting section of the insulating fixing column is located at the rear end position of the insulating fixing column. The outer diameter of the front end support section of the insulating fixing column is larger than the size of the rear end connecting section of the insulating fixing column. The front end support section of the insulating fixing column is located at the external position of the front end of the outer shell. A shoulder is provided between the front end support section of the insulating fixing column and the rear end connecting section of the insulating fixing column. The shoulder is axially fixedly connected to the front end portion of the outer shell, and the outer circumference of the rear end connecting section of the insulating fixing column is detachably connected to the inner circumference of the outer shell.

3. The touch sensor with a detachable structure according to claim 2, characterized in that: A chamfer is provided at the connection between the inner circumferential surface of the through hole inside the insulating fixing column and the rear end surface of the insulating fixing column; A chamfer is provided at the connection between the groove at the rear end portion of the outer shell and the rear end surface of the outer shell.

4. The touch sensor with a detachable structure according to claim 3, characterized in that: The outer circumference of the rear end connection section of the insulating fixing column is provided with an external thread, the inner surface of the through hole on the outer shell is provided with an internal thread, and the rear end connection section of the insulating fixing column and the outer shell are fixed by thread locking; The outer circumference of the induction contact is provided with an external thread, the inner surface of the through hole on the insulating fixing column is provided with an internal thread, and the induction contact and the insulating fixing column are fixed by thread locking.

5. The touch sensor with a detachable structure according to claim 4, characterized in that: The outer circumference of the outer shell is provided with an external thread, the front end position of the external thread extends to the frontmost position of the outer shell, and the rear end position of the external thread extends to a position close to the rearmost position of the outer shell; A locking nut is threadedly connected to the external thread.

6. The touch sensor with a detachable structure according to claim 5, characterized in that: The number of the locking nuts is two.

Images