CN213546205U - Non-contact proximity switch and valve position indicating system - Google Patents

Abstract

The embodiment of the utility model provides a non-contact proximity switch and valve position indicating system. Wherein, non-contact proximity switch includes: a housing; the contact seat comprises a first fixed contact, a second fixed contact and a rotatable movable contact arc-shaped plate, wherein the first fixed contact and the second fixed contact are respectively arranged at two ends of the movable contact arc-shaped plate. The elastic component is rotatably arranged in the shell, and one part of the elastic component presses the movable contact arc-shaped plate and can slide on the surface of the movable contact arc-shaped plate. The driving assembly comprises a movable magnetic part, a fixed magnetic part, a connecting shaft and a connecting rod. The valve position indicating system comprises a valve, a bracket, an electric connector, an indicator and the proximity switch, wherein a valve rod of the valve is provided with a target for attracting the movable magnetic part. The utility model provides a proximity switch, elastic component will first move the stationary contact and compress tightly contact state with first stationary contact or with second moving the stationary contact and second stationary contact, can not cause contact malfunction under high vibration environment.

Description

Non-contact proximity switch and valve position indicating system

Technical Field

The embodiment of the utility model provides a relate to the on-off control technique, especially relate to a non-contact proximity switch and valve position indicating system.

Background

The non-contact proximity switch is a position switch capable of outputting a switch signal without contacting an external component, and the proximity switch changes state and outputs a switching value signal when the distance between a target and a sensing surface of the switch is smaller than or larger than an action threshold value. The existing non-contact proximity switch mostly adopts a magnetic part to directly drive a switch contact, the magnetic part is in rigid connection with the contact, and when vibration exists in a working environment (particularly when the proximity switch is installed in a pipeline or other high-vibration environments), the magnetic part vibrates to cause false operation of the proximity switch and generate false signals.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a non-contact proximity switch has solved current proximity switch when there is the vibration in operational environment, and the magnetic part vibration can lead to the proximity switch malfunction, produces the problem of false signal.

According to an aspect of the embodiments of the present invention, there is provided a non-contact proximity switch, including:

a housing including an open end and a closed end;

the contact seat is arranged in the shell and is fixedly connected with the shell, and the contact seat is close to the opening end of the shell; the contact base comprises a first fixed contact, a second fixed contact and a rotatable movable contact arc-shaped plate, the first fixed contact, the second fixed contact and the rotatable movable contact arc-shaped plate extend towards the closed end of the shell, the first fixed contact and the second fixed contact are arranged at intervals, and a first movable contact and a second movable contact are respectively arranged at two ends of the movable contact arc-shaped plate;

the elastic assembly is rotatably arranged in the shell, a rotating shaft of the elastic assembly is perpendicular to the axis of the shell, and a part of the elastic assembly presses the movable contact arc plate and can slide on the surface of the movable contact arc plate so as to drive the movable contact arc plate to switch between the positions where the first movable contact is in contact with the first fixed contact and the second movable contact is in contact with the second fixed contact;

the driving assembly comprises a movable magnetic part, a fixed magnetic part, a connecting shaft and a connecting rod, wherein the fixed magnetic part is fixed in the shell, the movable magnetic part is arranged in the shell and positioned between the closed end of the shell and the fixed magnetic part, and the movable magnetic part can move in the shell along the axis direction of the shell; the first end of connecting axle with activity magnetism spare fixed connection, the second end of connecting axle passes fixed magnetism spare with the first end of connecting rod is articulated, the second end of connecting rod with elastic component is articulated.

In an optional implementation manner, the contact base further comprises a support, the support is located between the first fixed contact and the second fixed contact, one end of the support, facing the closed end of the shell, is connected with the movable contact arc plate, and the movable contact arc plate can rotate around a connection point with the support; when the elastic component presses the part of the movable contact arc plate to pass through the connecting point of the movable contact arc plate and the support, the movable contact arc plate rotates to change the state of the proximity switch.

In an optional implementation manner, the connection point of the movable contact arc plate and the support is located at the middle point of the movable contact arc plate; and/or the presence of a gas in the gas,

the contact base further comprises three contact pins and a base, the three contact pins penetrate through the base, the first fixed contact and the second fixed contact are formed by the two contact pins facing the end portion of the movable contact arc-shaped plate, and the other contact pin facing the end portion of the movable contact arc-shaped plate is fixedly connected with the support.

In an alternative implementation manner, the elastic assembly comprises a spring seat and an elastic part, the spring seat is arranged in the shell and is in pin joint with the shell, the spring seat can rotate around a connection point with the shell, the rotation axis of the spring seat is perpendicular to the axis of the shell, and the side wall of the spring seat is hinged with the second end of the connecting rod; the spring holder is provided with an accommodating groove with an opening facing the movable contact arc-shaped plate, one end of the elastic component is positioned in the accommodating groove, and the other end of the elastic component compresses the movable contact arc-shaped plate.

In an alternative implementation manner, the elastic component comprises a spring and a ball, a first end of the spring is located inside the accommodating groove, a second end of the spring presses the movable contact arc plate through the ball, and the ball is rotatably connected with the spring.

In an optional implementation manner, the elastic assembly further includes a spring sleeve, the spring sleeve is located inside the accommodating groove, a first end of the spring abuts against a bottom wall of the accommodating groove, a second end of the spring is located in the spring sleeve and abuts against the spring sleeve, and an end of the spring sleeve facing the moving contact arc plate is provided with a mounting groove for rotatably mounting the ball.

In an alternative implementation, the device further comprises a support component, wherein the support component is arranged in the shell and fixed with the shell; the supporting assembly comprises a magnetic piece mounting frame and a movable part positioning frame, a first end of the magnetic piece mounting frame abuts against the closed end of the shell, and a second end of the magnetic piece mounting frame abuts against the movable part positioning frame; openings are respectively formed in two ends of the magnetic piece mounting frame, the movable magnetic piece is located in the first end of the magnetic piece mounting frame, and the movable magnetic piece can move along the axis of the magnetic piece mounting frame; the housing, the magnetic member mounting bracket and the movable member positioning bracket define a mounting hole for receiving the fixed magnetic member.

In an optional implementation manner, the first end of the connecting shaft is provided with an expanded portion, and the expanded portion is provided with a mounting groove for fixing the movable magnetic member.

In an optional implementation manner, the contact device further comprises a compression nut, the compression nut is arranged in the shell and is in threaded connection with the shell, and the compression nut is located between the contact seat and the open end of the shell.

According to another aspect of the embodiments of the present invention, there is provided a valve position indicating system, comprising a valve, a bracket, an electrical connector, an indicator, and a non-contact proximity switch as described above;

the valve rod of the valve is provided with a target used for attracting a movable magnetic part of the proximity switch, the valve and the proximity switch are installed on the bracket, and the indicator is electrically connected with a contact of the proximity switch through the electric connecting piece.

As will be appreciated by those skilled in the art, the non-contact proximity switch of the present invention includes a housing, a drive assembly, a spring assembly, and a contact block. The shell comprises an open end and a closed end, the contact seat is arranged in the shell and is fixedly connected with the shell, and the contact seat is close to the open end of the shell; the contact base comprises a first fixed contact, a second fixed contact and a rotatable movable contact arc-shaped plate, wherein the first fixed contact, the second fixed contact and the rotatable movable contact arc-shaped plate extend towards the closed end of the shell, the first fixed contact and the second fixed contact are arranged at intervals, and a first movable contact and a second movable contact are respectively arranged at two ends of the movable contact arc-shaped plate. The elastic component is rotatably arranged in the shell, a rotating shaft of the elastic component is perpendicular to the axis of the shell, and one part of the elastic component presses the movable contact arc plate and can slide on the surface of the movable contact arc plate so as to drive the movable contact arc plate to be switched between the positions where the first movable contact is in contact with the first fixed contact and the positions where the second movable contact is in contact with the second fixed contact. The driving assembly comprises a movable magnetic part, a fixed magnetic part, a connecting shaft and a connecting rod, the fixed magnetic part is fixed in the shell, the movable magnetic part is arranged in the shell and positioned between the closed end of the shell and the fixed magnetic part, and the movable magnetic part can move in the shell along the axis direction of the shell; the first end of connecting axle and activity magnetic part fixed connection, the second end of connecting axle passes fixed magnetic part and articulates with the first end of connecting rod, and the second end of connecting rod articulates with elastic component. Therefore, when the movable contact arc plate rotates between the positions where the first movable contact is in contact with the first fixed contact and the positions where the second movable contact is in contact with the second fixed contact, the elastic assembly can compress the first movable contact and the first fixed contact or the second movable contact and the second fixed contact, and contact misoperation of the proximity switch under a vibration environment is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic diagram of a contact structure of a proximity switch of the prior art;

fig. 2 is a schematic structural diagram of a non-contact proximity switch provided in an embodiment of the present invention in an operating state;

FIG. 3 is a schematic structural diagram of the non-contact proximity switch shown in FIG. 2 in a non-operating state;

fig. 4 is a schematic partial structural diagram of a driving assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a contact base according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of the connection of the moving contact arc plate, the elastic component and the driving component provided by the embodiment of the present invention;

fig. 7 is a schematic view of a partial structure of a valve position indicating system according to an embodiment of the present invention.

Description of reference numerals:

1-a housing;

2-a contact base;

21-a first stationary contact;

22-a second stationary contact;

23-a support;

24-a stylus;

25-a base;

26-connecting sleeves;

27-moving contact arc plate;

271-a first movable contact;

272-a second movable contact;

3-an elastic component;

31-spring seats;

32-an elastic member;

321-a spring;

322-a ball bearing;

323-spring housing;

4-pressing the nut;

5-a drive assembly;

51-a movable magnetic member;

52-fixed magnetic element;

53-a connecting shaft;

54-a connecting rod;

6-a support assembly;

61-a magnetic member mounting bracket;

62-a movable part positioning frame;

7-a target;

8-an electrical connection;

81-socket;

82-a plug;

9-moving contact arm.

Detailed Description

First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be modified as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Fig. 1 is a schematic structural diagram of a contact of a conventional proximity switch. As shown in fig. 1, the existing proximity switch includes a housing, a movable magnetic element, a fixed magnetic element, a movable contact arm 9 and a connecting shaft coaxial with the housing are disposed inside the housing, a left end of the connecting shaft is connected to the movable magnetic element, a right end of the connecting shaft passes through the fixed magnetic element and is rigidly connected to the movable contact arm 9, the movable contact arm 9 is perpendicular to an axis of the connecting shaft, a stationary contact is disposed on each of left and right sides of the movable contact arm 9, where a first stationary contact 21 is defined as a contact on a left side of the movable contact arm 9 and a second stationary contact 22 is defined as a contact on a right side of the movable contact arm 9 in the existing proximity switch. The movable magnetic part can move left and right to drive the movable contact arm 9 to move left and right through the connecting shaft, and the movable contact arm 9 is contacted with the first fixed contact 21 when moving to the right end point and contacted with the second fixed contact 22 when moving to the left end point. However, when the proximity switch shakes along with the vibration of the movable contact arm 9 in a vibration environment, the movable and static contacts are switched continuously, and the proximity switch is easy to generate contact misoperation.

In view of the above, the inventor designs a non-contact proximity switch using elastic connection, which uses the elastic force of an elastic component to press a moving contact and a static contact, and can maintain reliable contact between the contacts when the proximity switch vibrates with the environment, and which includes a housing, a driving component, an elastic component and a contact base. The housing is configured to be open at one end and closed at the other end. The contact seat is arranged in the shell and is fixedly connected with the shell, and the contact seat is close to the opening end of the shell; the contact base comprises a first fixed contact, a second fixed contact and a rotatable movable contact arc-shaped plate, wherein the first fixed contact, the second fixed contact and the rotatable movable contact arc-shaped plate extend towards the closed end of the shell, the first fixed contact and the second fixed contact are arranged at intervals, and a first movable contact and a second movable contact are respectively arranged at two ends of the movable contact arc-shaped plate. The elastic component is rotatably arranged in the shell, a rotating shaft of the elastic component is perpendicular to the axis of the shell, and one part of the elastic component presses the movable contact arc plate and can slide on the surface of the movable contact arc plate so as to drive the movable contact arc plate to be switched between the positions where the first movable contact is in contact with the first fixed contact and the positions where the second movable contact is in contact with the second fixed contact. The driving assembly comprises a movable magnetic part, a fixed magnetic part, a connecting shaft and a connecting rod, the fixed magnetic part is fixed in the shell, the movable magnetic part is arranged in the shell and positioned between the closed end of the shell and the fixed magnetic part, and the movable magnetic part can move in the shell along the axis direction of the shell; the first end of connecting axle and activity magnetic part fixed connection, the second end of connecting axle passes fixed magnetic part and articulates with the first end of connecting rod, and the second end of connecting rod articulates with elastic component. Therefore, when the working environment of the proximity switch vibrates, the elastic assembly can apply elastic force to the movable contact arc-shaped plate, and then the elastic assembly can compress the first movable contact and the first fixed contact or the second movable contact and the second fixed contact, so that contact misoperation of the proximity switch under the vibration environment is avoided.

Example one

Fig. 2 is a schematic structural diagram of the non-contact proximity switch provided in this embodiment in an operating state, and fig. 3 is a schematic structural diagram of the non-contact proximity switch shown in fig. 2 in a non-operating state. It is defined that the first movable contact 271 is in a non-operating state when it contacts the first stationary contact 21, and the second movable contact 272 is in an operating state when it contacts the second stationary contact 22. As shown in fig. 2 to 3, the present embodiment provides a non-contact proximity switch including a housing 1, a contact holder 2, a resilient member 3, and a driving member 5. The housing 1 includes an open end and a closed end as a housing of the proximity switch. The diameter and length of the housing 1 are not limited in this embodiment, and those skilled in the art can set the diameter and length according to actual needs.

One possible implementation is that the left end outer side wall of the housing 1 may be provided with an external thread, and then the proximity switch may be fixed at the position to be mounted through the external thread of the housing 1. Preferably, the outer diameter of the left side part of the housing 1 is the smallest and the outer side wall is provided with an external thread, and the outer diameter of the middle part of the housing 1 is larger than that of the left side part, that is, when the proximity switch is installed through the thread, the middle part of the housing 1 can be used for limiting. The right part of the shell 1 has the largest outer diameter and can be arranged into a hexagonal prism shape, so that a screwing tool can be conveniently used for screwing.

Preferably, a metal material can be used as the material of the housing 1, for example, the housing 1 can be made of stainless steel, and by providing the housing 1 as stainless steel, on the one hand, the structural strength of the housing 1 is ensured, and on the other hand, the stainless steel has a better corrosion resistance. Furthermore, the non-contact proximity switch provided by the embodiment can be applied to harsh working environments, such as underwater or nuclear power stations.

With continued reference to fig. 2-3, a driving assembly 5 is disposed inside the supporting assembly 6, the driving assembly 5 includes a movable magnetic member 51, a fixed magnetic member 52, a connecting shaft 53 and a connecting rod 54, the fixed magnetic member 52 and the housing 1 are fixed to each other, in one possible implementation manner, the supporting assembly 6 is disposed inside the housing 1, the supporting assembly 6 is located inside the housing 1 and fixed to the housing 1, exemplarily, the supporting assembly 6 includes a magnetic member mounting bracket 61 and a movable member positioning bracket 62, the magnetic member mounting bracket 61 and the movable member positioning bracket 62 are abutted to each other, specifically, the left end of the magnetic member mounting bracket 61 is abutted to the closed end of the housing 1, and the right end of the magnetic member mounting bracket 61 is abutted to the left end of the movable member positioning bracket 62. The housing 1, the magnetic member mounting bracket 61 and the movable member positioning bracket 62 define a mounting hole for receiving the fixed magnetic member 52, illustratively, the mounting hole is coaxial with the housing 1, and the fixed magnetic member 52 is fixed in the mounting hole.

It should be noted that the material of the supporting component 6 should be a magnetic isolation material, so as to avoid magnetic permeability when the supporting component 6 is used to fix the magnetic member 52. Preferably, the material of the supporting component 6 also has high temperature resistance and radiation resistance, for example, Peek (polyetheretherketone) can be selected as the material of the supporting component 6, so as to ensure that the contactless proximity switch provided by the embodiment can be applied to a harsh environment.

Fig. 2-3 show that the movable magnetic member 51 can move inside the supporting assembly 6, specifically, the movable magnetic member 51 is located between the closed end of the casing 1 and the fixed magnetic member 52, i.e. the left side of the movable magnetic member 51 is the closed end of the casing 1, and the right side is the fixed magnetic member 52, and the movable magnetic member 51 can move left and right. Illustratively, both ends of the magnetic member mounting bracket 61 are respectively provided with openings, the movable magnetic member 51 is located in the left end of the magnetic member mounting bracket 61 and the movable magnetic member 51 is capable of moving along the axis of the magnetic member mounting bracket 61, that is, the left end of the magnetic member mounting bracket 61 is used for mounting the movable magnetic member 51.

In one possible implementation manner, the movable magnetic member 51 is fixed to the left end of the connecting shaft 53, and exemplarily, the left end of the connecting shaft 53 is provided with an expanded portion, the expanded portion is provided with a mounting groove, and the movable magnetic member 51 can be fixed to the mounting groove in an embedding manner.

The left end of the connecting shaft 53 is provided with the expansion part which is provided with the mounting groove, so that on one hand, the stability of connection between the connecting shaft 53 and the movable magnetic piece 51 is ensured; on the other hand, the movable magnetic member 51 can be limited by the outer wall of the expanded portion and the inner wall of the magnetic member mounting bracket 61, so that the movable magnetic member 51 can only move in the magnetic member mounting bracket 61 along the axial direction of the magnetic member mounting bracket 61, i.e., the left-right direction in fig. 2-3.

Fig. 4 is a schematic partial structural diagram of the driving assembly provided in this embodiment. As shown in fig. 4, one possible implementation is that the movable magnetic member 51 and the fixed magnetic member 52 have the same magnetization direction, that is, the movable magnetic member 51 and the fixed magnetic member 52 attract each other, and the fixed magnetic member 52 can apply a force to the right to the movable magnetic member 51. When the distance between the target 7 and the movable magnetic member 51 exceeds a preset distance, the fixed magnetic member 52 attracts the movable magnetic member 51 to the right end, and when the distance between the movable magnetic member 51 and the target 7 is less than the preset distance, the attraction of the target 7 to the movable magnetic member 51 exceeds the attraction of the fixed magnetic member 52 to the movable magnetic member 51, and the movable magnetic member 51 moves leftward. That is, the movable magnetic member 51 can move in the axial direction of the support assembly 6 by the magnetic force of the target 7 and the stationary magnetic member 52. It is easy to understand that the preset distance is the distance between the target 7 and the movable magnetic member 51 when the attraction force of the target 7 and the fixed magnetic member 52 to the movable magnetic member 51 is the same.

As shown in fig. 2-3, the right end of the connecting shaft 53 passes through the fixed magnetic member 52 and is hinged to the left end of the connecting rod 54, that is, the connecting rod 54 can rotate relative to the connecting shaft 53 during the process that the movable magnetic member 51 drives the connecting shaft 53 to move left and right. The right end of the link 54 is hinged to the bottom of the elastic member 3.

With continued reference to fig. 2-3, the elastomeric assembly 3 is rotatably disposed within the housing 1, illustratively, the elastomeric assembly 3 is rotatably disposed within the movable member positioning frame 62. Specifically, the elastic assembly 3 can rotate around a in fig. 2, the right side of the elastic assembly 3 presses on the movable contact arc plate 27 and can slide on the surface of the movable contact arc plate 27, the movable contact arc plate 27 is rotatably arranged inside the housing 1, the movable contact arc plate 27 is rotatably arranged inside the movable part positioning frame 62 and is inclined to the connecting shaft 53, and the movable contact arc plate 27 is driven by the elastic assembly 3 to rotate, so that the proximity switch can be switched between the working state and the non-working state.

Fig. 6 is a schematic structural diagram of the connection of the moving contact arc plate, the elastic component and the driving component provided in this embodiment. As shown in fig. 6, the movable magnetic member 51 can drive the connecting shaft 53 to move left and right, the connecting shaft 53 can drive the connecting rod 54 to rotate relative to the connecting shaft 53, the connecting rod 54 drives the elastic component 3 to rotate around the position a, the right end of the elastic component 3 can slide on the surface of the movable contact arc 27, and the movable contact arc 27 can rotate around the position B, so that the movable contact arc 27 can be driven to rotate around the position B by the rotation of the elastic component 3, and further, the switching of the working states is realized.

As will be understood by those skilled in the art, the driving assembly 3 converts the linear motion of the movable magnetic member 51 into the rotational motion of the elastic assembly 3 through the connecting rod 54 and the connecting shaft 53, and specifically, when the movable magnetic member 51 moves from right to left, the elastic assembly 3 rotates clockwise; when the movable magnetic member 51 moves from left to right, the elastic member 3 rotates counterclockwise.

One possible implementation is that the elastic component 3 includes a spring seat 31 and an elastic component 32, the spring seat 31 is disposed inside the housing 1 and is pinned with the housing 1, and exemplarily, the spring seat is disposed inside the movable component positioning frame 62, specifically, the spring seat 31 is pinned with the movable component positioning frame 62 at a in fig. 6, and the spring seat 31 can rotate around the a. The side wall of the spring seat 31 is hinged to the right end of the connecting rod 54, for example, the bottom of the side wall of the spring seat 31 is hinged to the connecting rod 54, and a person skilled in the art may also set the hinge point of the spring seat 31 and the connecting rod 54 at other positions of the side wall of the spring seat 31, such as the top, and the embodiment is not limited thereto.

As shown in fig. 6, the spring seat 31 is provided with a receiving groove opened toward the movable contact arc plate 27, i.e., to the right in fig. 6, and the left end of the elastic member 32 is located in the receiving groove and the right end of the elastic member 32 presses the movable contact arc plate 27. By arranging the spring seat 31 in pin joint with the support assembly 6, the spring seat 31 is provided with a receiving groove, and the elastic part 32 is fixed by the receiving groove, so that on one hand, the elastic part 32 is driven to slide on the surface of the movable contact arc-shaped plate 27 by the rotation of the spring seat 31 to drive the movable contact arc-shaped plate 27 to rotate; on the other hand, the left end of the elastic member 32 is held by the receiving groove, so that the elastic member 32 can press the movable contact arc plate 27 to the right side.

With continued reference to fig. 6, the elastic member 32 includes a spring 321 and a ball 322, the left end of the spring 321 is located inside the receiving groove, the right end of the spring 321 presses the movable contact arc 27 through the ball 322, and the ball 322 is rotatably connected to the spring 321.

By arranging the elastic member 32 as the spring 321 and the ball 322, on the basis of ensuring that the elastic member 32 applies a right elastic force to the movable contact arc 27, the ball 322 is in contact with the movable contact arc 27, so that the elastic member 3 can slide more smoothly on the surface of the arc movable contact arc 27.

Preferably, as shown in fig. 6, the elastic member 32 further includes a spring housing 323 for mounting the ball 322, the spring housing 323 being disposed inside the receiving groove, it being understood that the spring housing 323 can slide inside the receiving groove in the axial direction of the receiving groove. The left end of the spring 321 abuts against the bottom wall of the accommodating groove, and the right end of the spring is located in the spring sleeve 323 and abuts against the spring sleeve 323. The spring 321 is in a compressed state, i.e. the spring housing 323 has a tendency to move to the right relative to the spring seat 31. The right end of spring housing 323 is provided with the mounting groove of rotatable installation ball 322, and the mounting groove is greater than ball 322 promptly to guarantee that ball 322 can rotate in the inside of mounting groove.

Through setting up spring housing 323, utilize the fixed ball 322 of the mounting groove of spring housing 323, can prevent that ball 322 from taking place to drop at the in-process that movable contact arc 27 surface removed, guaranteed the stability of connecting.

As shown in fig. 2-3, the upper and lower ends of the moving contact arc plate 27 are respectively provided with a first moving contact 271 and a second moving contact 272. It is easily understood that the movable contact arc plate 27, the first movable contact 271, and the second movable contact 272 are made of a conductive material. The sectional shape of the moving contact arc plate 27 is not limited in this embodiment, and those skilled in the art can set the sectional shape according to actual needs.

Fig. 5 is a schematic structural diagram of the contact socket provided in this embodiment. As shown in fig. 2 and 5, the contact base 2 is disposed in the housing 1 near the open end of the housing 1, and one possible way to achieve this is to dispose the contact base 2 in the housing 1 against the right end of the support member 6 inside the housing 1. The contact base 2 includes a first stationary contact 21 and a second stationary contact 22 extending toward the left end of the housing 1, and the first stationary contact 21 and the second stationary contact 22 are spaced apart. It is easy to understand that the first stationary contact 21 and the second stationary contact 22 can be located on the same side of the moving contact arc 27 or on both sides of the moving contact arc 27, respectively, that is, when the moving contact arc 27 rotates, the contact position with the first stationary contact 21 and the contact position with the second stationary contact 22 can be located on the same side or opposite sides of the moving contact arc 27.

As can be understood by those skilled in the art, the elastic member 3 presses the movable contact arc 27 in a state where the first fixed contact 21 is in contact with the first movable contact 271 of the movable contact arc 27 or in a state where the second fixed contact 22 is in contact with the second movable contact 272 of the movable contact arc 27. The elastic component 3 rotates to make the ball 322 move on the moving contact arc plate 27, when the ball 322 passes through the rotating point of the moving contact arc plate 27, such as the point B in fig. 6, the state of the proximity switch is changed, so that the malfunction of the proximity switch under the vibration environment can be effectively prevented.

As shown in fig. 5, the contact base 2 further includes a holder 23, a contact pin 24, and a base 25. The support 23 is arranged in the shell 1 and connected with the movable contact arc-shaped plate 27, the movable contact arc-shaped plate 27 can rotate around a contact point with the support 23, preferably, the contact position of the support 23 and the movable contact arc-shaped plate 27 is positioned at the middle point of the movable contact arc-shaped plate 27, so that the elastic component 3 drives the movable contact arc-shaped plate 27 to rotate clockwise and anticlockwise with the same force, the proximity switch is switched more smoothly in two different working states, and meanwhile, the movable contact arc-shaped plate 27 rotates only when the ball 322 passes through the middle point of the movable contact arc-shaped plate 27.

With reference to fig. 5, the contact pins 24 pass through the base 25 and are fixedly connected to the base 25, the left and right ends of the contact pins 24 extend out of the base 25, the number of the contact pins 24 is three, the left ends of two contact pins 24 respectively form the first stationary contact 21 and the second stationary contact 22, and the left end of the other contact pin (not shown in the figure) is fixedly connected to the support 23.

It can be understood by those skilled in the art that by providing the base 25 and the contact pins 24, the left end of the contact pin 24 is used for contacting with the movable contact arc 27, the right end of the contact pin 24 is used for connecting with an external circuit, the number of the contact pins 24 is three, one of the contact pins 24 connected with the support 23 can be used as a common end of the circuit, and further, the proximity switch provided by the embodiment can be externally connected with two circuits, and the switching between the two circuits can be realized through the change of the working state of the proximity switch.

As shown in fig. 2 to 3, the proximity switch provided in this embodiment further includes a compression nut 4, the compression nut 4 is disposed in the housing 1 and is in threaded connection with the housing 1, and the compression nut 4 is located between the contact base 2 and the right end of the housing 1. It will be readily understood that the radial cross section of the gland nut 4 is a ring-shaped structure, and the right end of the contact pin 24 may protrude rightward from the inside of the ring-shaped structure. The contact holder 2 can be prevented from coming off from the open end, i.e., the right end, of the housing 1 by providing the compression nut 4.

Example two

Fig. 7 is a schematic view of a partial structure of the valve position indicating system provided in this embodiment. On the basis of the first embodiment, the present embodiment further provides a valve position indicating system, which includes a valve, a bracket, an electrical connector 8, an indicator, and the non-contact proximity switch in the first embodiment.

The valve rod of the valve is provided with the target 7, the fixing mode of the target 7 and the valve rod is not limited in the embodiment, and the target 7 and the valve rod can be set by a person skilled in the art according to actual needs. The valve and the proximity switch are both arranged on the bracket, the rear-stage circuit is electrically connected with the contact of the proximity switch through an electric connector 8, and the indicator is positioned on the rear-stage circuit, namely the circuit electrically connected with the proximity switch.

As shown in fig. 5 and 7, the electrical connector 8 comprises a plug 82 and a socket 81, a main body portion of the socket 81 is fixedly connected with the housing 1, for example, by welding, and contact pins of the socket 81 and contact pins of the proximity switch can be connected by a connection sleeve 26. It is easy to understand that, the socket 81 is connected with the plug 82 in a plugging manner, and a possible implementation manner is that a housing can be arranged to cover outer side walls of the socket 81 and the plug 82, so as to ensure the reliability of the connection between the socket 81 and the plug 82.

As will be understood by those skilled in the art, when the valve is turned from the open state to the closed state, the target 7 is driven by the valve rod of the valve to move in a direction close to the proximity switch, the proximity switch is turned from the non-operating state to the operating state, the circuit in the subsequent circuit is connected, and the indicator is operated to indicate that the valve is closed.

The proximity switch in this embodiment has the same structure as the proximity switch provided in the first embodiment, and can bring about the same or similar technical effects, and details are not repeated herein, and reference may be specifically made to the description of the foregoing embodiments.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if present), and the like, are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A non-contact proximity switch, comprising:

a housing including an open end and a closed end;

the contact seat is arranged in the shell and is fixedly connected with the shell, and the contact seat is close to the opening end of the shell; the contact base comprises a first fixed contact, a second fixed contact and a rotatable movable contact arc-shaped plate, the first fixed contact, the second fixed contact and the rotatable movable contact arc-shaped plate extend towards the closed end of the shell, the first fixed contact and the second fixed contact are arranged at intervals, and a first movable contact and a second movable contact are respectively arranged at two ends of the movable contact arc-shaped plate;

the elastic assembly is rotatably arranged in the shell, a rotating shaft of the elastic assembly is perpendicular to the axis of the shell, and a part of the elastic assembly presses the movable contact arc plate and can slide on the surface of the movable contact arc plate so as to drive the movable contact arc plate to switch between the positions where the first movable contact is in contact with the first fixed contact and the second movable contact is in contact with the second fixed contact;

the driving assembly comprises a movable magnetic part, a fixed magnetic part, a connecting shaft and a connecting rod, wherein the fixed magnetic part is fixed in the shell, the movable magnetic part is arranged in the shell and positioned between the closed end of the shell and the fixed magnetic part, and the movable magnetic part can move in the shell along the axis direction of the shell; the first end of connecting axle with activity magnetism spare fixed connection, the second end of connecting axle passes fixed magnetism spare with the first end of connecting rod is articulated, the second end of connecting rod with elastic component is articulated.

2. The contactless proximity switch of claim 1, wherein the contact holder further comprises a support between the first stationary contact and the second stationary contact, the support being connected to the moving contact arc at an end of the support facing the closed end of the housing, the moving contact arc being rotatable about a connection point with the support; when the elastic component presses the part of the movable contact arc plate to pass through the connecting point of the movable contact arc plate and the support, the movable contact arc plate rotates to change the state of the proximity switch.

3. The contactless proximity switch of claim 2, wherein a connection point of the movable contact arc to the holder is located at a midpoint of the movable contact arc; and/or the presence of a gas in the gas,

the contact base further comprises three contact pins and a base, the three contact pins penetrate through the base, the first fixed contact and the second fixed contact are formed by the two contact pins facing the end portion of the movable contact arc-shaped plate, and the other contact pin facing the end portion of the movable contact arc-shaped plate is fixedly connected with the support.

4. The non-contact proximity switch of claim 1, wherein the resilient assembly comprises a spring seat and a resilient member, the spring seat is disposed within the housing and pinned to the housing, the spring seat is rotatable about a connection point to the housing, a rotational axis of the spring seat is perpendicular to an axis of the housing, and a sidewall of the spring seat is hinged to the second end of the linkage; the spring holder is provided with an accommodating groove with an opening facing the movable contact arc-shaped plate, one end of the elastic component is positioned in the accommodating groove, and the other end of the elastic component compresses the movable contact arc-shaped plate.

5. The contactless proximity switch according to claim 4, wherein the elastic member includes a spring and a ball, a first end of the spring is located inside the receiving groove, a second end of the spring presses the movable contact arc plate via the ball, and the ball is rotatably coupled to the spring.

6. The contactless proximity switch of claim 5, wherein the resilient assembly further includes a spring housing located within the receiving slot, a first end of the spring abutting a bottom wall of the receiving slot, a second end of the spring being located within the spring housing and abutting the spring housing, an end of the spring housing facing the moving contact arc being provided with a mounting slot for rotatably mounting the ball.

7. The non-contact proximity switch of claim 1, further comprising a support assembly disposed within and secured to the housing; the supporting assembly comprises a magnetic piece mounting frame and a movable part positioning frame, a first end of the magnetic piece mounting frame abuts against the closed end of the shell, and a second end of the magnetic piece mounting frame abuts against the movable part positioning frame; openings are respectively formed in two ends of the magnetic piece mounting frame, the movable magnetic piece is located in the first end of the magnetic piece mounting frame, and the movable magnetic piece can move along the axis of the magnetic piece mounting frame; the housing, the magnetic member mounting bracket and the movable member positioning bracket define a mounting hole for receiving the fixed magnetic member.

8. The non-contact proximity switch according to any of claims 1 to 7, wherein the first end of the connection shaft is provided with an enlarged portion, and the enlarged portion is provided with a mounting groove for fixing the movable magnetic member.

9. The non-contact proximity switch of any of claims 1-7, further comprising a compression nut disposed within and threadably coupled to the housing, the compression nut being positioned between the contact base and the open end of the housing.

10. A valve position indicating system comprising a valve, a bracket, an electrical connection, an indicator, and the non-contact proximity switch of any of claims 1-7;

the valve rod of the valve is provided with a target used for attracting a movable magnetic part of the proximity switch, the valve and the proximity switch are installed on the bracket, and the indicator is electrically connected with a contact of the proximity switch through the electric connecting piece.

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