CN220085941U - Moving contact assembly, safety switch sensor and safety switch - Google Patents

Abstract

The utility model relates to a safety switch sensor, a movable contact assembly thereof and a safety switch comprising the safety switch sensor. The movable contact assembly comprises a base, a top cap, a spring and a conducting strip, wherein the base and the top cap are movably inserted and matched to form a limiting channel, one end of the spring is abutted against the base, the other end of the spring and the top cap clamp and fix the conducting strip, the conducting strip penetrates through the limiting channel, and when the top cap moves relative to the base under the action of external force, the conducting strip moves along with the top cap. The movable contact assembly is convenient to install and detach, and meanwhile, the reliability of the safety switch and the safety switch sensor containing the movable contact assembly can be improved.

Description

Moving contact assembly, safety switch sensor and safety switch

Technical Field

The utility model relates to the technical field of safety operation of industrial electrical equipment, in particular to a movable contact assembly, a safety detection sensor and a safety switch.

Background

Automated production lines, large or hazardous equipment operating sites have a wide variety of industrial electrical equipment for which safety precautions are often taken to ensure the safety of personnel and production operations. For example, electrical equipment may be enclosed with a fence or safety door as a hazard source to control the ingress or egress of personnel to avoid operator contact or access to the hazard source. The safety door is locked by arranging the safety switch on the safety door, so that the safety door can be opened only when the electric equipment in the safety door stops running under the condition that the safety door meets specific safety conditions, and the safety door can be opened to allow operators to enter, so that the safety of the operators is guaranteed to the greatest extent.

The safety door switch (safety switch) in the prior art can be divided into a contact type safety switch and a non-contact type safety switch according to a detection mode, wherein the contact type safety switch is higher in safety level due to the fact that the opening and closing of the safety door are controlled through a physical locking mode, and is more suitable for various industrial production places. The prior art contact type safety switch generally utilizes a sensor to detect a moving part controlled by an electromagnetic valve, controls the coupling separation between a movable contact and a fixed contact in the sensor through the contact or physical coupling condition of the moving part and the related part in the sensor so as to inform the state of the current safety door of a center console, and the sensor generally comprises more parts with small size, such as a spring, a top cap, a conducting plate and other scattered parts, and when the moving contact is assembled on a base, the spring also easily bounces off the base when the moving contact assembly is required to be disassembled for maintenance or detection, and is unfavorable for the safety of operators, and when the safety switch is reinstalled, the prior art safety switch is not easy to maintain.

Disclosure of Invention

The utility model aims to provide a movable contact assembly to solve the technical problem that the movable contact assembly is not easy to mount and dismount in a safety switch in the prior art.

The utility model provides a movable contact assembly, includes base, hood, spring and conducting strip, the base with the hood clearance fit forms spacing passageway, the one end butt of spring in the base, the other end of spring with the hood centre gripping is fixed the conducting strip, the conducting strip passes spacing passageway is worked as the hood receives the exogenic action and relatively the base removes, the conducting strip moves thereupon.

In some embodiments, the base includes a seat plate and two side plates extending upward from opposite sides of the seat plate and forming a first limiting channel therebetween; the top cap comprises a head and two tail plates, the two tail plates extend downwards from the lower surface of the head, a second limiting channel is formed between the two tail plates, and the first limiting channel and the second limiting channel are matched to form the limiting channel.

In some embodiments, the conductive sheet includes a conductive sheet base, a positioning hole in a center of the conductive sheet base, and conductive contacts at both ends of the conductive sheet base.

In some embodiments, the lower surface of the head is provided with a locating post that passes through the locating hole.

In some embodiments, the head includes a push surface that is an arcuate surface.

In some embodiments, the base further comprises a spring groove, the spring groove is arranged on the seat plate and faces the top cap, one end of the spring is positioned in the spring groove, and the limiting lug extends from the side plate to the center of the base along the horizontal direction and can limit the top cap in the vertical direction.

Another aspect of the present utility model provides a safety switch sensor, comprising: the device comprises a base, a stationary contact assembly, at least two movable contact assemblies, a sliding block, a spring and a storage box; the stationary contact assembly is mounted on the base and maintains a fixed position; the movable contact assembly is arranged on the base and corresponds to the stationary contact assembly; the sliding block is arranged between the at least two movable contact point assemblies, one end of the spring is propped against the base, the other end of the spring is propped against the sliding block, and the sliding block pushes the movable contact point assemblies to generate relative movement so that the connection state of the movable contact point assemblies and the static contact point assemblies is changed, and thus a contact conduction signal is generated; the storage box contains the base, the movable contact assembly, the stationary contact assembly and at least a part of the sliding block; the movable contact assembly comprises a base, a top cap, a spring and a conducting strip, wherein the base and the top cap are movably inserted and matched to form a limiting channel, one end of the spring is abutted to the base, the other end of the spring and the top cap are clamped and fixed on the conducting strip, the conducting strip penetrates through the limiting channel, and when the top cap is acted by external force to move relative to the base, the conducting strip moves.

In some embodiments, the slider includes a slider body, a first boss and a second boss, the first boss and the second boss are located at two sides of the slider body and respectively face the two movable contact assemblies, the first boss and the second boss respectively include a first inclined plane and a second inclined plane, and the first boss and the second boss are symmetrically arranged or the first inclined plane and the second inclined plane are reversely arranged.

In some embodiments, the sliding block further comprises an assembly groove, a first sliding rail and a second sliding rail, a sliding groove is formed in the bottom of the storage box, the first sliding rail and the second sliding rail are limited in the sliding groove, the assembly groove is formed in one end of the sliding block, and the opening direction of the assembly groove is consistent with the opening direction formed by the first sliding rail and the second sliding rail.

A further aspect of the present utility model is to provide a safety switch comprising an electromagnet, a controlled lever, and a safety switch sensor comprising a base, a stationary contact assembly, at least two moving contact assemblies, a slider, and a receiver; the stationary contact assembly is mounted on the base and maintains a fixed position; the movable contact assembly is arranged on the base and corresponds to the stationary contact assembly; the sliding block is arranged between the at least two movable contact point assemblies, the controlled rod is driven by the electromagnet to push the sliding block to move along the direction of the controlled rod so as to push the movable contact point assemblies to move relatively, and the connection state of the movable contact point assemblies and the fixed contact point assemblies is changed; the storage box contains the base, the movable contact assembly, the stationary contact assembly and at least a part of the sliding block; the movable contact assembly comprises a base, a top cap, a spring and a conducting strip, wherein the base and the top cap are movably inserted and matched to form a limiting channel, one end of the spring is abutted to the base, the other end of the spring and the top cap are clamped and fixed on the conducting strip, the conducting strip penetrates through the limiting channel, and when the top cap is pushed by the sliding block to move relative to the base, the conducting strip moves along with the conducting strip to move relative to the stationary contact assembly.

According to the movable contact assembly, the safety switch sensor and the safety switch, through the integrated structure formed by the base, the top cap, the spring and the conducting strip, the movable contact assembly can be conveniently installed on the base and can be conveniently detached from the base, namely, the movable contact assembly is more convenient to install and detach, the time required for installation can be reduced, the elements are not easy to flick off, and the reliability of the safety switch sensor and the safety switch is improved.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

The various features and embodiments of the utility model mentioned in the above aspects can be applied to other aspects as appropriate, where appropriate. Thus, a particular feature in one aspect may be combined with a particular feature in another aspect as appropriate.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a safety switch sensor according to an embodiment of the present utility model;

FIG. 2 is a schematic perspective view of the safety switch sensor of FIG. 1 from another perspective;

FIG. 3 is a schematic perspective view of the safety switch sensor of FIG. 1 from another perspective;

fig. 4 is an exploded schematic view of the safety switch sensor shown in fig. 1.

Fig. 5 is a schematic perspective view of a storage case of a safety switch sensor according to an embodiment of the present utility model;

FIG. 6 is a schematic perspective view of the safety switch sensor of FIG. 1 with the receiver removed;

FIG. 7 is a schematic perspective view of the safety switch sensor of FIG. 5 from another perspective;

FIG. 8 is a schematic perspective view of a base of a safety switch sensor according to an embodiment of the present utility model;

FIG. 9 is a schematic perspective view of the base of FIG. 8 from another perspective;

FIG. 10 is a schematic perspective view of a stationary contact assembly of a safety switch sensor according to one embodiment of the present utility model;

FIG. 11 is a schematic perspective view of a slider of a safety switch sensor according to an embodiment of the present utility model;

FIG. 12 is a schematic perspective view of the slider of FIG. 11 from another perspective;

FIG. 13a is a schematic top view of the slider of FIG. 4;

FIG. 13b is a schematic view of a slider according to another embodiment of the present utility model;

FIG. 13c is a schematic view of a slider according to yet another embodiment of the present utility model;

FIG. 13d is a schematic view of a slider according to yet another embodiment of the present utility model;

FIG. 14 is a schematic perspective view of a movable contact assembly according to an embodiment of the present utility model;

FIG. 15 is a schematic view of a split of a movable contact assembly according to one embodiment of the present utility model;

FIG. 16 is a schematic perspective view of a base of a movable contact assembly according to one embodiment of the present utility model;

FIG. 17 is a schematic perspective view of a top cap of a movable contact assembly according to an embodiment of the present utility model;

FIG. 18 is a schematic perspective view of the overcap of FIG. 17 from another perspective;

fig. 19 is a schematic structural view of a safety switch according to an embodiment of the present utility model.

Reference numerals illustrate:

1: a safety switch sensor; 11: a storage box; 110: a storage box base; 111: mounting the protruding blocks; 112: an adaptation groove; 113: a notch; 1100: a bottom plate; 1101a: a left side wall; 1101b: a right side wall; 1101c: a front wall; 1101d: a rear wall; 114: a chute; 12: a base; 120 a base body; 12A: a first mounting portion; 12A'; 12B: a third mounting portion; 12B'; 122: a scale groove; 124: a window; 125A: a first clamping seat; 125B: a second clamping seat; 126: a first positioning column; 13: a stationary contact member; 13A: a first stationary contact assembly; 13A'; 13B: a third stationary contact assembly; 13B'; 130: a wire pressing screw; 132: a first conductive sheet; 1325: a first conductive contact; 14. 24, 34, 44: a slide block; 140: a slider base; 141: an assembly groove; 14A, 24A, 34A, 44A: a first boss; 14B, 24B, 34B, 44B: a second boss; 142A: a first slide rail; 142B: a second slide rail; 146: a guide groove; 145A: a first plane; 145B: a second plane; 146A: a first inclined surface; 146B: a second inclined surface; 15: a movable contact member; 15A: a first movable contact assembly; 15B: a second movable contact assembly; 150: a base; 1500: a seat plate; 1501: a side plate; 1502: a guide post; 1503: a spring groove; 1504: a limit lug; 1505: a first limiting channel; 152: a second spring; 154: a second conductive sheet; 1540: a conductive sheet base; 1542: positioning holes; 1545: a second conductive contact; 155: a top cap; 1550: a head; 1551: a tail plate; 1552: a second positioning column; 1553: the second limiting channel; s1: pushing the surface; 16: a first spring; 2: an operation head; 21: a locking member; 3: an electromagnet; 4: a controlled lever; 5: a housing; 8: an actuator; 9: an interface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "first" and "second" and the like in the description of embodiments of the present utility model are used for distinguishing between different objects and not for describing a particular sequential order of objects. For example, the first receiving chamber and the second receiving chamber are used to distinguish between different receiving chambers, and are not used to describe a particular sequence of receiving chambers. The terms "inner," "middle," "bottom," "upper," and the like refer to an orientation or positional relationship based on that shown in the drawings, for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus are not to be construed as limiting the utility model.

In embodiments of the utility model, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

The following describes the embodiments of the present utility model further with reference to the drawings.

Referring to fig. 1 to 13a, a safety switch sensor 1 of one embodiment includes a housing 11, a base 12, a stationary contact member 13, a slider 14, a movable contact member 15, and a first spring 16. The stationary contact members 13 and the movable contact members 15 are mounted on the base 12 in a one-to-one correspondence, one end of the first spring 16 abuts against the base, the other end abuts against the slider 14, the slider 14 is located between a pair of movable contact assemblies 15A and 15B included in the movable contact members 15, the slider 14 is pressed by an external force to move the first spring 16, or is moved by the resilience force of the first spring 16, and the movable contact members 15 are pushed and retracted by the forward and backward movement of the slider 14, so that the electrical connection state between the movable contact members 15 and the stationary contact members 13 is switched.

The base 12, the stationary contact member 13, the movable contact member 15, and the first spring 16 are accommodated in the housing 11, and the slider 14 is also at least partially accommodated in the housing 11, together forming a single integral member, and can be mounted and locked in or into the case of the safety switch by the mounting projection 112 of the housing 11 (refer to fig. 19). The storage box 11 includes a storage box base 110, a mounting protrusion 111, an adapting groove 112, a notch 113 and a sliding groove 114, wherein the storage box base 110 may be a box body with an upper opening, and may include a bottom plate 1100, a left side wall 1101a, a right side wall 1101b, a front wall 1101c and a rear wall 1101d, and the left side wall 1101a, the right side wall 1101b, the front wall 1101c and the rear wall 1101d are respectively formed to extend upward from four sides of the bottom plate 1100. The fitting groove 112 is formed on the lower surface of the bottom plate 1100 and extends in the front-rear direction, and the sliding groove 114 is formed on the upper surface of the bottom plate 1100 and extends in the front-rear direction, and the fitting groove 112 is adapted to the bottom of the case of the safety switch to position the receiving box 11. The slide groove 114 allows the slider 14 to slide in the front-rear direction and keeps the slider 14 on a predetermined track without deviation, thereby improving the reliability of the safety switch. The notch 113 is formed in the front wall 1101c at a position corresponding to the slide groove 114, and the other end of the slider 14 may pass through the notch 113, for example, when the first spring 16 rebounds. The base 12 to which the movable contact member 15 and the stationary contact member 13 are attached is housed in the housing case 11, and is held and fixed by the left side wall 1101a, the right side wall 1101b, the front wall 1101c, and the rear wall 1101 d.

The stationary contact member 13 includes a plurality of stationary contact assemblies, the movable contact member 15 includes a plurality of movable contact assemblies, and in the case of a 2-contact safety switch, the movable contact member 15 includes a first movable contact assembly 15A and a second movable contact assembly 15B, and the stationary contact member 13 includes a first stationary contact assembly 13A, a second stationary contact assembly 13A ', a third stationary contact assembly 13B, and a fourth stationary contact assembly 13B'. A pair of stationary contact assemblies, such as a first stationary contact assembly 13A and a second stationary contact assembly 13A ', on the same side of the slider 14 correspond to two connection points in a control circuit, which is turned on when the first stationary contact assembly 13A and the second stationary contact assembly 13A ' are brought into contact with the corresponding first movable contact assembly 15A, and which is turned off when the first movable contact assembly 15A is moved by the slider 14 to be separated from the first stationary contact assembly 13A and the second stationary contact assembly 13A '.

The base 12 includes a base body 120 and a plurality of mounting portions corresponding to the plurality of stationary contact assemblies, respectively, such as a first mounting portion 12A, a second mounting portion 12A ', a third mounting portion 12B, and a fourth mounting portion 12B' disposed at four corners of the base body 120 for mounting the first stationary contact assembly 13A, the second stationary contact assembly 13A ', the third stationary contact assembly 13B, and the fourth stationary contact assembly 13B', respectively. Each mounting portion may be a recessed mounting seat with a gap between it and the base body 120. The base body 120 is further provided with a window 124 and a scale groove 122 at a position between the two pairs of stationary contact assemblies, the window 124 is a rectangular opening, so that the current positions of the slider 14 and the first spring 16 thereunder can be observed, and the scale groove 122 provided adjacent to the window 124 can indicate the current switch state, that is, a visual physical display as a result of the detection of the safety switch sensor 1. The base 12 further includes a first positioning column 126, which is disposed along the moving direction of the slider 14, and the first spring 16 is sleeved on the first positioning column 126, so as to play a role in positioning and guiding the spring, avoid generating other displacements beyond the preset travel direction, and improve the reliability of the sensor.

The base 12 further includes a first card holder 125A and a second card holder 125B, where the first card holder 125A and the second card holder 125B are located on different sides of the base 12, such as the first card holder 125A and the second card holder 125B face the bottom plate 1100 of the storage box 11, and the mounting portion for mounting the stationary contact assembly faces away from the bottom plate 1100. The first clamping seat 125A and the second clamping seat 125B are respectively used for installing the first movable contact assembly 15A and the second movable contact assembly 15B. The first movable contact assembly 15A or the second movable contact assembly 15B is taken as a whole, and can be clamped into the first clamping seat 125A or the second clamping seat 125B at one time, so that the safety switch sensor 1 is simpler and easier to install and more convenient to operate, and the movable contact assembly can be taken out as a part at one time when the safety switch sensor needs to be disassembled.

In one example, each stationary contact assembly includes a pressing screw 130 and a first conductive piece 132, the first conductive piece 132 has a generally U-shaped structure having two sides of which are not uniform in length, the first conductive piece 132 is mounted to the mounting portion 12A (12A ', 12B or 12B') by the pressing screw 130, and a longer side of the first conductive piece 132 is inserted into a gap between the mounting portion and the base body 120 and reaches a side where the first clamping seat 125A and the second clamping seat 125B are located. The first conductive sheet 132 is provided with a protruding first conductive contact 1325 at an end near one side thereof.

The slider 14 includes a slider base 140, an assembly groove 141, a first boss 14A, a second boss 14B, a first slide rail 142A, a second slide rail 142B, and a guide groove 146. The slider body 140 is substantially cylindrical, and a first slide rail 142A and a second slide rail 142B are formed opposite to each other on a side surface of the slider body 14 facing the bottom plate 1100 of the storage box 11, the first slide rail 142A and the second slide rail 142B corresponding to the slide grooves 114, and when the slider 14 slides back and forth, the first slide rail 142A and the second slide rail 142B are restricted by the slide grooves 114 and do not deviate from a predetermined moving direction. A first boss 14A and a second boss 14B are provided on the side of the slider base 14 facing the first movable contact assembly 15A and the side facing the second movable contact assembly 15B, respectively. The first boss 14A and the second boss 14B are respectively used for pushing the movable contact point assemblies on the same side when the sliding block 14 generates displacement, so that the movable contact point assemblies are linked to generate displacement, the connection state between the movable contact point assemblies and the stationary contact point assemblies is changed, and sensing detection of external force applied to the sliding block 14 is realized. One end of the slider 14 is provided with a guide groove 146, and as an example, the guide groove 146 may be a cylindrical blind hole, and a portion of the first spring enters the guide groove 146 and is abutted by the bottom wall of the guide groove 146, and the end of the other end of the slider 14 is provided with a fitting groove 141, and the fitting groove 141 may be used to fit the slider 14 into a member for applying an external force in the safety switch, for example, referring to fig. 19, one end of the controlled lever 4 driven by the electromagnet 3 may enter the fitting groove 141, and when the electromagnet 3 is powered off, one end of the controlled lever 4 abuts against the fitting groove 141 and pushes the slider 14 so that the movable contact assembly and the stationary contact assembly are in the first state, and when the electromagnet is powered on, the second state. Whether the first state is off or on is determined according to design requirements, such as setting according to the specification of normally open or normally closed. The opening direction of the assembly groove 141 is consistent with the opening direction formed by the first sliding rail 142A and the second sliding rail 142B, that is, one opening direction faces the bottom of the storage box 11, and the other opening direction faces the moving direction of the sliding block 14, so that when the assembled safety switch sensor 1 is mounted on the safety switch shell 5, the assembly groove 141 of the sliding block 14 can be aligned with the controlled rod 4 by directly aligning the positions, and the safety switch sensor 1 is mounted, thereby further facilitating the mounting of the safety switch and the sensor. It should be understood that the opening direction of the first slide rail 142A and the second slide rail 142B refers to the gap and the gap formed between the two slide rails

Referring to fig. 13a, the first boss 14A of the slider 14 includes a first plane 145A and a first inclined plane 146A, and the second boss 14B includes a second plane 145B and a second inclined plane 146B, wherein the first inclined plane 146A and the second inclined plane 146B are respectively connected to two side surfaces of the slider body 140, and the first plane 145A is connected to the first inclined plane 146A, and the second plane 145B is connected to the second inclined plane 146B, and the first plane 145A and the second plane 145B are respectively parallel to two side surfaces of the slider body 140, that is, a width formed between the first plane 145A and the second plane 145B is greater than a width formed between two side surfaces of the slider body 140, and when the top cap head of the movable contact assembly is abutted against different portions of the slider 14, such as when it is abutted against the side surfaces of the slider body 140, the first inclined plane 146A (or the second inclined plane 146B) or the first plane 145A (the second plane 145B) respectively, the connection state between the movable contact assembly and the corresponding stationary contact assembly is changed, so that different combinations of states can be output. In this example, the length of the first plane 145A of the first boss 14A is one-half the length of the second plane 145B of the second boss 14B. While the start points of the first and second ramps 146A, 146B are not synchronized, the end points of the two are also not synchronized (i.e., the ramp end points are not synchronized). By the different lengths of the inclined planes and the planes contained in the bosses and/or the alignment/staggering of the end point positions, the bosses on the two sides of the sliding block 14 can push corresponding movable contact point assemblies at the same time or in the same/different detected sensor states, so that more different design requirements can be met, and the safety requirements of the working environment can be met.

13b-13d are schematic views of a slider of several other embodiments showing the different contact types contained by the slider. Specifically, the sliders 24, 34, 44 are substantially identical to the slider 14 in structure, and can be installed in the base 11 and cooperate with the movable contact member 15, except that the sliders 24 include a first boss 24A and a second boss 24B that are symmetrically arranged, that is, the two bosses are identical in shape and size, that is, the lengths and the end points of the plane and the inclined plane are in one-to-one correspondence. The first boss 34A and the second boss 34B included in the slider 34 are also symmetrically disposed, and are different from the slider 24 mainly in that the starting point of the inclined surface is different from the distance from the end face of the slider base, which makes the reaction time of the state change different. The first boss 44A and the second boss 44B included in the slider 44 have opposite inclined planes, that is, the first inclined plane and the second inclined plane are disposed in opposite directions, which can realize a combination design of a normally closed type and a normally open type. The joint of the boss inclined plane and the boss plane is subjected to arc treatment, so that the movement of the movable contact point assembly is smoother when the movable contact point assembly is pushed.

In summary, it can be seen that the embodiments of the present utility model provide a safety switch sensor, which includes: the device comprises a base, a stationary contact assembly, at least two movable contact assemblies, a sliding block and a storage box; the stationary contact assembly is mounted on the base and maintains a fixed position; the movable contact assembly is arranged on the base and corresponds to the fixed contact assembly, and the movable contact assembly can move relatively to the fixed contact assembly; the sliding block is arranged between the at least two movable contact point assemblies and can push the movable contact point assemblies to generate relative movement so that the connection state of the movable contact point assemblies and the fixed contact point assemblies is changed, and a contact conduction signal is generated and transmitted to the main control circuit; the housing case houses the base, the movable contact assembly, the stationary contact assembly, and at least a portion of the slider.

Referring further to fig. 14-18 in combination, in the present embodiment, the movable contact member 15 includes a pair of movable contact assemblies, namely: a first movable contact assembly 15A and a second movable contact assembly 15B. Each movable contact assembly has the same structure, is oppositely arranged on the base 2, and is respectively abutted with two sides of the sliding block 14. Taking one of the movable contact assemblies 15A as an example, the first movable contact assembly 15A includes a base 150, a second spring 152, a second conductive sheet 154, and a top cap 155. The base 150 includes a seat plate 1500, side plates 1501 and a first limiting channel 1505, wherein the side plates 1501 extend upward from opposite sides of the seat plate 1500, and the first limiting channel 1505 is formed between two opposite side plates 1501. Top cap 155 is clamped between side plates 1501 for relative securement. Top cap 155 includes a head 1550 and a tail plate 1551, tail plate 1551 extends downward from the lower surface of head 1550, tail plate 1551 corresponds to side plate 1501, i.e., tail plate 1551 is inserted into base 150 and abuts against side plate 1501, so that top cap 155 is fixed in the horizontal direction in the drawing but movable in the vertical direction, wherein the length of tail plate 1551 is smaller than the length of side plate 1501. A second limiting channel 1553 is formed between the two opposite tail plates 1551, and when the top cap 155 is inserted into the base 150, the first limiting channel 1505 and the second limiting channel 1553 cooperate to form a limiting channel which is closed up and down and has openings on two sides. The second spring 152 has one end abutting against the seat plate 1500 of the base 150 and the other end abutting against the second conductive sheet 154 against the lower surface of the head 1550 of the top cap 155, the second conductive sheet 154 crossing the limiting channel, whereby the second conductive sheet 154 can be displaced up and down as the top cap 155 moves up and down in the limiting channel.

Second conductive tab 154 includes a conductive tab base 1540, a locating hole 1542, and a second conductive contact 1545. The conductive sheet base 1540 is a long sheet-shaped conductive body, a positioning hole 1542 is provided at a center position of the conductive sheet base 1540, and second conductive contacts 1545 are provided at both ends of the conductive sheet base 1540. The lower surface of cap 155 head 1550 still is provided with second reference column 1552, through the corresponding cooperation of second reference column 1552 and locating hole 1542, is convenient for fix a position second conducting strip 154, makes things convenient for the installation of second conducting strip 154, is also convenient for establish second spring 152 cover simultaneously second reference column 1552 fixes a position, makes things convenient for the installation of second spring 152, also can avoid the spring to fly out when receiving stronger external force simultaneously. The base 150 may also include a guide post 1502, a spring slot 1503, and a stop tab 1504. Spring groove 1503 is provided in seat plate 1500 and toward top cap 155, and one end of second spring 152 may be positioned within spring groove 1503, which further facilitates the installation of second spring 152 and stabilizes second spring 152 in a vertical orientation. The guide post 1502 is disposed at the center of the spring slot 152, and one end of the second spring 152 can pass through the guide post 1502 to guide the second spring 152 when convenient to install. The stop tab 1504 extends horizontally from the side plate 1501 toward the center of the base 150 and limits the movement of the top cap 155 in a vertical direction to ensure that the top cap 155 is not sprung by the second spring 152 on its back side even if the movable contact assembly 15A or 15B is removed from the base 12.

The head 1550 of the top cap 155 may perform an arc process, as shown in the drawing, the top of the head 1550 includes a pushing surface S1, where the pushing surface S1 is a surface in contact with the slider 14, and as an example, the pushing surface S1 is an arc surface, when the slider 14 moves to push the top cap 155 toward the base 150, the head 1550 and the first boss 14A or the second boss 14B of the slider 14 perform a relative motion, and the arc surface makes the relative motion smoother, so as to improve the sensitivity of the sensor, and the arc surface reduces friction loss generated by the relative motion, so as to improve the reliability of the sensor.

As can be seen from the above, the movable contact assembly according to the embodiment of the utility model comprises a base, a top cap, a spring and a conductive sheet, wherein the base and the top cap are movably inserted and matched to form a limiting channel, one end of the spring is abutted against the base, the other end of the spring and the top cap clamp and fix the conductive sheet, and the conductive sheet passes through the limiting channel, and when the top cap is acted by external force to move relative to the base, the conductive sheet moves along with the limiting channel. Through the integral type structure with base, hood, spring and conducting strip are constituteed, can be convenient install on the base, also be convenient for dismantle movable contact subassembly from the base, the component is difficult for being flown by the bullet moreover, promotes the reliability of product.

Referring to fig. 19, a schematic structural diagram of a safety switch according to an embodiment of the utility model is shown. The safety switch comprises a safety switch sensor 1, an operating head 2, an electromagnet 3, a controlled lever 4, a housing 5 and an interface 9. The interface 9 is used for electrically connecting the equipment or the central console, so as to supply power to the safety switch and transmit the state information monitored by the safety switch sensor 1 to the central console. The safety switch sensor 1, the electromagnet 3 and the controlled rod 4 are arranged in the shell 5, wherein the controlled rod 4 moves forwards or backwards under the drive of the electromagnet 3 and retreats to an initial state under the condition that the electromagnet 3 is powered off, namely the controlled rod 4 pushes the sliding block 14 to move along the direction of the controlled rod 4 under the drive of the electromagnet 3. The operation head 2 includes a locking member 21, when the electromagnet 3 is energized, which indicates that the device in the safety door is in an operating or energized state at this time, the actuator 8 (such as a key or a locking piece, etc. mounted on the safety door corresponding to the safety door switch) is in a state of being inserted into the operation head 2, and one end of the lever 4 near the operation head 2 is strongly locked by the locking member 21, and the actuator 8 cannot be pulled out (i.e., the door cannot be opened manually during the operation of the device). When the device stops running, the electromagnet 3 is powered off, the controlled rod 4 is unlocked, and the executing piece 8 can be pulled out. It should be understood that the safety switch of the present embodiment is an application example of the aforementioned safety switch sensor 1, and is not intended to limit the specific functions of the safety switch sensor 1.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims (10)

1. A movable contact assembly, comprising: the device comprises a base, a top cap, a spring and a conducting strip, wherein the base and the top cap are movably spliced and matched to form a limiting channel, one end of the spring is abutted to the base, the other end of the spring and the top cap are clamped and fixed on the conducting strip, the conducting strip penetrates through the limiting channel, and when the top cap is subjected to external force action and moves relative to the base, the conducting strip moves along with the limiting channel.

2. The movable contact assembly of claim 1, wherein the base includes a seat plate and two side plates extending upwardly from opposite sides of the seat plate and forming a first limiting channel therebetween; the top cap comprises a head and two tail plates, the two tail plates extend downwards from the lower surface of the head, a second limiting channel is formed between the two tail plates, and the first limiting channel and the second limiting channel are matched to form the limiting channel.

3. The movable contact assembly of claim 2, wherein the conductive sheet comprises a conductive sheet body, a positioning hole and conductive contacts, the positioning hole being located in a center of the conductive sheet body, the conductive contacts being located at both ends of the conductive sheet body.

4. The movable contact assembly according to claim 3, wherein a lower surface of the head is provided with a positioning post, the positioning post passing through the positioning hole.

5. The movable contact assembly of claim 2, wherein the head includes a push surface, the push surface being an arcuate surface.

6. The movable contact assembly of claim 2, wherein the base further comprises a spring slot disposed in the seat plate and facing the top cap, one end of the spring being positioned in the spring slot, the limit tab extending horizontally from the side plate toward the center of the base and limiting the top cap in a vertical direction.

7. A safety switch sensor, comprising:

a base;

a stationary contact assembly mounted to the base and held in a fixed position;

at least two movable contact assemblies mounted to the base and disposed in correspondence with the stationary contact assemblies, and the movable contact assemblies are the movable contact assemblies according to any one of claims 1 to 6;

the sliding block is arranged between the at least two movable contact point assemblies, one end of the spring is propped against the base, the other end of the spring is propped against the sliding block, and the sliding block pushes the movable contact point assemblies to generate relative movement so that the connection state of the movable contact point assemblies and the static contact point assemblies is changed, and thus a contact conduction signal is generated;

and a storage box which accommodates the base, the movable contact assembly, the stationary contact assembly and at least a part of the slider.

8. The safety switch sensor of claim 7, wherein the slider comprises a slider body, a first boss and a second boss, the first boss and the second boss are located on two sides of the slider body and face the two movable contact assemblies respectively, the first boss and the second boss comprise a first inclined surface and a second inclined surface respectively, and the first boss and the second boss are symmetrically arranged or the first inclined surface and the second inclined surface are reversely arranged.

9. The safety switch sensor according to claim 8, wherein the slider further comprises an assembly groove, a first slide rail and a second slide rail, a slide groove is formed in the bottom of the storage box, the first slide rail and the second slide rail are limited in the slide groove, the assembly groove is formed in one end of the slider, and the opening direction of the assembly groove is consistent with the opening direction formed by the first slide rail and the second slide rail.

10. A safety switch comprising an electromagnet, a controlled lever, and a safety switch sensor, wherein the safety switch sensor is the safety switch sensor of claim 7, and the controlled lever is driven by the electromagnet to push the slider of the safety switch sensor to move in the direction of the controlled lever.