Travel switch and power supply plug-in connector

Abstract

The utility model discloses a travel switch and a power supply plug-in connector, which comprise a shell and a brake mechanism arranged in the shell, and are characterized in that the brake mechanism comprises an ejector rod, a common contact piece, a normally closed contact piece, a normally open contact piece and a conductive connecting piece, the conductive connecting piece is mounted on the outer surface of the middle part of the ejector rod; the upper parts of the common contact piece, the normally-closed contact piece and the normally-open contact piece are arranged in the shell on the outer side of the ejector rod; the outer surface of the conductive connecting piece is always in contact with the upper side wall of the common contact piece; a spring for applying upward thrust to the ejector rod is also arranged; when the spring extends out, the outer wall of the conductive connecting piece is in contact with the side walls of the normally-closed contact piece and the common contact piece respectively; and when the ejector rod moves downwards and compresses the spring, the outer wall of the conductive connecting piece is in contact with the side walls of the normally open contact piece and the common contact piece respectively. The use stability and the service life of the travel switch are improved.

Description

Technical Field

[0001] The utility model relates to a travel switch, in particular to a travel switch and a power connector. Background Art

[0002] A travel switch uses the collision of mechanical moving parts to make its contact actuate, so as to achieve the connection or disconnection of a control circuit, realize the closing and opening of the control circuit, and is used for limiting and protecting the circuit.

[0003] In the prior art, travel switches are used in multiple industries. In the automotive field, in order to ensure the safety of electric vehicle charging, a travel switch is provided in the electric vehicle socket. Before the electric vehicle is charged, the travel switch is in a normally closed state. At this time, the electric vehicle can be used normally or for other test uses. For example, the patent number is: CN201520103974.2, and the patent name is: A power connector with a travel switch. It adopts a double-contact structure. The moving contact bridge needs to contact two normally closed static contacts or two normally open static contacts simultaneously to achieve the conduction of the corresponding two normally closed static contacts or the conduction of two normally open static contacts. However, in actual use, especially after using for a period of time, due to reasons such as material deformation, there may be a situation of poor contact. For example, only one end of the moving contact bridge contacts a normally closed static contact or a normally open static contact, and the other normally closed static contact or normally open static contact fails to contact or fails to contact stably, resulting in poor contact and affecting its application stability. Summary of the Invention

[0004] The purpose of the utility model is to provide a travel switch and a power connector. By using this structure, the use stability of the travel switch can be improved and its application performance can be ensured.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: A travel switch includes a housing and a braking mechanism arranged in the housing. The braking mechanism includes a push rod, a common contact piece, a normally closed contact piece, a normally open contact piece and a conductive connecting piece.

[0006] The push rod is movably connected with the housing, and the conductive connecting piece is installed on the outer surface of the middle part of the push rod.

[0007] Above the common contact piece, the normally closed contact piece and the normally open contact piece are arranged in the housing outside the push rod. The outer surface of the conductive connecting piece is always in contact with the upper side wall of the common contact piece. The conductive connecting piece is used to electrically conduct the common contact piece and the normally open contact piece or to electrically conduct the common contact piece and the normally closed contact piece.

[0008] A spring is also provided to give an upward thrust to the push rod.

[0009] When the spring is in the extended state, the ejector rod moves upward, the outer wall of the conductive connector contacts the side walls of the normally closed contact piece and the common contact piece respectively, the conductive connector does not contact the normally open contact piece, and the conductive connector electrically conducts the normally closed contact piece and the common contact piece;

[0010] When the ejector rod moves downward and compresses the spring, the conductive connector does not contact the normally closed contact piece, the outer wall of the conductive connector contacts the side walls of the normally open contact piece and the common contact piece respectively, and the conductive connector electrically conducts the normally open contact piece and the common contact piece.

[0011] In the above technical solution, when the conductive connector contacts the normally open contact piece, the conductive connector does not contact the normally closed contact piece;

[0012] When the conductive connector contacts the normally open contact piece, the conductive connector does not contact the normally closed contact piece.

[0013] In the above technical solution, the top of the ejector rod is exposed outside the top of the housing.

[0014] In the above technical solution, the bottoms of the common contact piece, the normally closed contact piece and the normally open contact piece are exposed outside the bottom of the housing.

[0015] In the above technical solution, the housing includes an upper housing and a lower housing. At least two buckles are provided on the outer side wall of the lower housing, and clamping grooves matching with the buckles are provided on the outer side wall of the upper housing. The upper housing and the lower housing are clamped and matched through the buckles and the clamping grooves.

[0016] In the above technical solution, the conductive connector includes a drum spring. The drum spring is sleeved on the outer surface of the middle part of the ejector rod, and the outer surface of the middle part of the drum spring is always in contact with the side wall of the common contact piece;

[0017] When the ejector rod moves upward, the outer surface of the middle part of the drum spring contacts the upper side wall of the normally closed contact piece;

[0018] When the ejector rod moves downward, the outer surface of the middle part of the drum spring contacts the upper side wall of the normally open contact piece.

[0019] In the above technical solution, the distance between the outer surface of the middle part of the drum spring in the natural state and the outer surface of the ejector rod is greater than the distance between the side walls of the common contact piece, the normally open contact piece, the normally closed contact piece and the outer wall of the ejector rod.

[0020] In the above technical solution, two spaced convex rings are provided on the outer surface of the middle part of the ejector rod. The conductive connector is sleeved on the ejector rod outside the two convex rings, and the outer diameter of the outer surface of the middle part of the conductive connector is greater than the outer diameter of the convex rings.

[0021] In the above technical solution, the bottom of the spring abuts against the inner wall of the bottom of the housing, and the top of the spring abuts against the ejector rod.

[0022] In the above technical solution, a chamber is provided in the housing, and the middle and lower parts of the ejector rod are movably arranged in the chamber;

[0023] The common contact piece, normally closed contact piece, normally open contact piece, conductive connecting piece and spring are arranged in the chamber;

[0024] The top of the ejector rod passes through the chamber and is arranged above the top surface of the housing.

[0025] The present utility model further provides a power plug connector, including a socket, and the above-mentioned travel switch is arranged on the socket;

[0026] And / or, it further includes a plug inserted and matched with the socket, and a thimble matched with the travel switch is arranged on the plug.

[0027] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0028] 1. In the present utility model, by arranging an ejector rod, a common contact piece, a normally closed contact piece, a normally open contact piece and a conductive connecting piece, and the conductive connecting piece is always in contact with the common contact piece. Through the movement of the ejector rod, the conductive connecting piece is respectively in contact with the normally closed contact piece and the normally open contact piece, so as to realize the electrical conduction between the common contact piece and the normally closed contact piece or the normally open contact piece. Since the circuits connected by the normally closed contact piece and the normally open contact piece are different, therefore, different functions can be realized when the common contact point is conducted with the normally closed contact piece or the normally open contact piece. Compared with the structural form of the previous double contact points, it can prevent the situation of poor contact, has better stability, longer service life, and ensures the application range of the travel switch, making the function of the electric vehicle power plug connector more abundant;

[0029] 2. In the present utility model, the conductive connecting piece adopts a drum spring, which has elasticity itself, can make it always in contact with the common contact piece, and when the ejector rod drives the drum spring to move, it can ensure that the drum spring can stably contact with the normally open contact piece or the normally closed contact piece, ensuring the stability of conduction. Description of the Drawings

[0030] Figure 1 is the structural schematic diagram of the first embodiment of the present utility model;

[0031] Figure 2 is the cross-sectional structural schematic diagram of the first embodiment of the present utility model;

[0032] Figure 3 is the exploded view of the first embodiment of the present utility model;

[0033] Figure 4 It is a schematic structural diagram of the ejector rod moving upward and the spring extending in the first embodiment of the present utility model (the lower housing is not shown);

[0034] Figure 5 It is a schematic structural diagram of the ejector rod moving downward and the spring being compressed in the first embodiment of the present utility model (the lower housing is not shown);

[0035] Figure 6 is Figure 4 a three-dimensional structural diagram of;

[0036] Figure 7 It is a schematic structural diagram of the first embodiment of the present utility model (the housing and the spring are not shown);

[0037] Figure 8 It is a schematic structural diagram of the conductive connecting member in the first embodiment of the present utility model;

[0038] Figure 9 It is a schematic structural diagram of the ejector rod in the first embodiment of the present utility model;

[0039] Figure 10 It is a schematic structural diagram of the lower housing in the first embodiment of the present utility model.

[0040] Wherein: 1. Housing; 2. Ejector rod; 3. Common contact piece; 4. Normally closed contact piece; 5. Normally open contact piece; 6. Conductive connecting member; 7. Spring; 8. Chamber; 9. Upper housing; 10. Lower housing; 11. Buckle; 12. Card slot; 13. Connecting ring; 14. Elastic piece; 15. Notch; 16. Convex ring; 17. Through hole; 18. Card slot. Specific embodiments

[0041] The present utility model will be further described below with reference to the accompanying drawings and embodiments:

[0042] Embodiment 1: Refer to Figures 1 to 10 As shown, a travel switch includes a housing 1 and a braking mechanism disposed within the housing 1. The braking mechanism includes an ejector rod 2, a common contact piece 3, a normally closed contact piece 4, a normally open contact piece 5, and a conductive connecting member 6.

[0043] The ejector rod 2 is movably connected to the housing 1, and the conductive connecting member 6 is installed on the outer surface of the middle part of the ejector rod 2;

[0044] Above the common contact piece 3, the normally closed contact piece 4, and the normally open contact piece 5 are disposed within the housing 1 outside the ejector rod 2. The outer surface of the conductive connecting member 6 is always in contact with the upper side wall of the common contact piece 3. The conductive connecting member 6 is used to electrically conduct the common contact piece 3 and the normally open contact piece 5 or to electrically conduct the common contact piece 3 and the normally closed contact piece 4;

[0045] A spring 7 is also provided to give an upward thrust to the ejector rod 2;

[0046] When the spring 7 is in the extended state, the ejector rod 2 moves upward, the outer walls of the conductive connecting member 6 are respectively in contact with the side walls of the normally closed contact piece 4 and the common contact piece 3, the conductive connecting member 6 is not in contact with the normally open contact piece 5, and the conductive connecting member 6 electrically conducts the normally closed contact piece 4 and the common contact piece 3;

[0047] When the ejector rod 2 moves downward and compresses the spring 7, the conductive connecting member 6 is not in contact with the normally closed contact piece 4, the outer walls of the conductive connecting member 6 are respectively in contact with the side walls of the normally open contact piece 5 and the common contact piece 3, and the conductive connecting member 6 electrically conducts the normally open contact piece 5 and the common contact piece 3.

[0048] In this embodiment, the common contact piece, the normally closed contact piece, the normally open contact piece, and the conductive connecting member are all made of conductive materials, such as copper and aluminum, and the housing and the ejector rod are made of non-conductive materials, such as plastic. The common contact piece, the normally closed contact piece, and the normally open contact piece are respectively connected to different circuits. When the common contact piece and the normally closed contact piece are electrically conducted, the travel switch is in the closed state. When the common contact piece and the normally open contact piece are electrically conducted, the travel switch is in the open state. The present invention also provides a power plug connector, including a socket, and the above travel switch is arranged on the socket. Different functions are realized by switching the state of the travel switch. Among them, the common contact piece, the normally open contact piece, and the normally closed contact piece are all connected to the control core of the electric vehicle. When the conductive connecting member electrically conducts the common contact piece and the normally closed contact piece, the control core connects all the circuits in the electric vehicle. At this time, the common contact piece and the normally open contact piece are not electrically conducted, and the electric vehicle can run normally. When the conductive connecting member electrically conducts the common contact piece and the normally open contact piece, at this time, the common contact piece and the normally closed contact piece are not electrically conducted, and the control core closes some circuits in the electric vehicle, such as the connection circuit between the battery and the motor, so that the electric vehicle cannot run, but the electrical appliances in the vehicle can be used normally. Of course, there is another connection method. When the common contact piece and the normally closed contact piece are electrically conducted, the control core connects some circuits of the electric vehicle, such as the connection circuit between the battery and the motor, so that the electric vehicle cannot run, but the electrical appliances in the vehicle can be used normally; when the common contact piece and the normally open contact piece are electrically conducted, the control core connects all the circuits in the electric vehicle, and the electric vehicle can run normally. This method can be used to test the performance of the electric vehicle. In this embodiment, the electrical conduction between the common contact piece and the normally open contact piece and the normally closed contact piece respectively can realize different functions, expand the use range of the travel switch, and make the functions of the power plug connector more abundant.

[0049] In this embodiment, in the normal state, the spring is in the extended state, and it pushes the ejector rod upward, causing the conductive connector to approach the upper part of the housing. At this time, the conductive connector is in contact with the normally closed contact piece and the common contact piece respectively, and the conductive connector is not in contact with the normally open contact piece, so that the closed state of the travel switch can be achieved. When an external force is applied to the ejector rod, the power plug connector further includes a plug that is inserted and matched with the socket. A thimble that cooperates with the travel switch is provided on the plug. When the plug and the socket are inserted, the thimble of the plug abuts against the top of the ejector rod, that is, the thimble applies a downward pressure to the ejector rod, pushing the ejector rod downward. At this time, the ejector rod will compress the spring. During this process, the downward movement of the ejector rod will synchronously drive the conductive connector to move downward. During the movement of the conductive connector, it will always be in contact with the common contact piece, and the two will not disconnect. During the downward movement of the conductive connector, the conductive connector will first disconnect from the normally closed contact piece, and then continue to move downward, it will be in contact with the normally open contact piece, so as to realize the electrical conduction between the normally open contact piece and the common contact piece, and the travel switch is switched to the open state. When the plug and the socket are separated, the ejector rod loses the external force of the thimble, and the restoring force of the spring will push the ejector rod upward, causing the conductive connector to move upward, disconnect from the normally open contact piece, and then contact the normally closed contact piece, realizing the electrical conduction between the common contact piece and the normally closed contact piece, and the travel switch is switched to the closed state.

[0050] In the present utility model, the stable electrical conduction between the common contact piece and the normally open contact piece or the normally closed contact piece can be effectively ensured, and the stability of the travel switch in use is stronger, and the situation of poor contact will not occur.

[0051] See Figure 2 、 3 As shown in the figure, a chamber 8 is provided in the housing 1, and the middle and lower parts of the ejector rod 2 are movably arranged in the chamber 8; the common contact piece 3, the normally closed contact piece 4, the normally open contact piece 5, the conductive connector 6 and the spring 7 are arranged in the chamber 8; the top of the ejector rod passes through the chamber and is arranged above the top surface of the housing. The top of the ejector rod is exposed outside the top of the housing. The bottoms of the common contact piece, the normally closed contact piece and the normally open contact piece are exposed outside the bottom of the housing.

[0052] In this embodiment, the top plane of the normally closed contact piece is above the top plane of the normally open contact piece, and there is a height difference between the two. More preferably, the normally closed contact piece is of an L-shaped structure, including a horizontal plate and a vertical plate which are of an integral structure. The top of the vertical plate is connected to one side of the bottom of the horizontal plate. The bottom plane of the horizontal plate is above the top surface of the normally open contact piece. The conductive connecting piece is beside the vertical plate and faces the horizontal plate. In the state where the spring body extends out, the conductive connecting piece contacts the side wall of the horizontal plate beside the vertical plate. During the process of the ejector rod driving the conductive connecting piece to move downward, the conductive connecting piece moves downward and disengages from the contact with the horizontal plate. At this time, the contact position between the conductive connecting piece and the horizontal plate will be beside the vertical plate. Therefore, the conductive connecting piece will not contact the vertical plate and the horizontal plate, that is, the conductive connecting piece does not contact the normally closed contact piece. The outer side surface of the conductive connecting piece will face the normally open contact piece. Then the ejector rod continues to move downward, and the conductive connecting piece will contact the side wall of the normally open contact piece, thereby realizing the electrical conduction between the normally open contact piece and the common contact piece.

[0053] Wherein, when the conductive connecting piece contacts the normally open contact piece, the conductive connecting piece does not contact the normally closed contact piece;

[0054] When the conductive connecting piece contacts the normally open contact piece, the conductive connecting piece does not contact the normally closed contact piece. This can ensure that the conductive connecting piece only conducts the common contact piece electrically with the normally open contact piece or only with the normally closed contact piece, and the common contact piece will not conduct the normally open contact piece and the normally closed contact piece at the same time, thereby realizing the switching of the travel switch between the off state and the on state.

[0055] See Figures 1 to 3 As shown, the housing 1 includes an upper housing 9 and a lower housing 10. At least two buckles 11 are provided on the outer side wall of the lower housing 10, and clamping grooves 12 matching with the buckles 11 are provided on the outer side wall of the upper housing 9. The upper housing 9 and the lower housing 10 are clamped and matched through the buckles 11 and the clamping grooves 12.

[0056] The bottom of the upper housing and the top of the lower housing form the chamber. Therefore, when assembling the travel switch, after the common contact piece, the spring, the normally open contact piece, the normally closed contact piece, the conductive connecting piece and the upper housing or the lower housing are assembled, when the other lower housing or upper housing and the corresponding upper housing or lower housing are quickly clamped and matched by using the buckles and the clamping grooves, the rapid assembly of the travel switch can be realized. Similarly, when disassembling and repairing, only the upper housing and the lower housing need to be quickly disassembled, which is convenient and fast.

[0057] See Figure 10As shown, three card slots 18 are provided in the lower shell, and the interiors of the three card slots are respectively connected to the chambers, and the tops of the common contacts, normally closed contacts and normally open contacts are respectively installed in a card slot, and the top of the card slot is connected to the top of the lower shell, and the bottom is connected to the bottom of the lower shell, and the top width of the card slot is greater than the bottom width. In this way, when assembling the common contacts, normally closed contacts and normally open contacts, they are directly inserted into the card slots from the top, and the bottom is exposed to the bottom of the lower shell, and then other components are assembled, and finally assembled with the upper shell, and the tops of the common contacts, normally closed contacts and normally open contacts are supported by the upper shell, so as to realize the rapid limiting of the three contacts, which is convenient for the rapid installation and removal of the contacts. At the same time, during the movement of the conductive connector, the corresponding contacts can also be supported by the card slots to prevent the contacts from being deformed, so as to ensure the stable electrical connection after the corresponding contacts and the conductive connector are in contact.

[0058] See also Figures 4 to 8 As shown, the conductive connecting member 6 includes a drum spring, which is sleeved on the middle outer surface of the top rod 2, and the middle outer surface of the drum spring is always in contact with the side wall of the common contact piece 3;

[0059] When the push rod 2 moves upward, the middle outer surface of the drum spring contacts the upper side wall of the normally closed contact piece 4;

[0060] When the push rod 2 moves downward, the middle outer surface of the drum spring contacts the upper side wall of the normally open contact piece 5.

[0061] The distance between the side walls of the common contact, the normally open contact, and the normally closed contact and the outer wall of the push rod is smaller than the distance between the middle outer surface of the drum spring and the outer surface of the push rod.

[0062] The distance between the middle outer surface of the drum spring in the natural state and the outer surface of the push rod is greater than the distance between the side walls of the common contact piece, the normally open contact piece, and the normally closed contact piece and the outer wall of the push rod.

[0063] In the present invention, the drum spring is a ring structure, see Figure 8As shown, the drum spring includes two connecting rings 13 and a plurality of elastic pieces 14. The top and bottom of the elastic pieces are respectively connected to the top and bottom surfaces of the two connecting rings. The plurality of elastic pieces are annularly arranged outside the axes of the two connecting rings. The elastic pieces are arc-shaped structures with convex middle parts. Therefore, the drum spring is a drum-shaped structure with a large middle diameter and small end diameters. In this way, in the normal state of the drum spring, the distance from the outer surface at the maximum diameter in the middle of the drum spring to the outer surface of the ejector rod is X, and the distances between the common contact piece, the normally closed contact piece, and the normally open contact piece and the outer surface of the ejector rod are all Y. The value of X is greater than the value of Y. Therefore, in the normal state, the drum spring is located between the common contact piece, the normally open contact piece, and the normally closed contact piece, and it will squeeze the middle part of the elastic piece, causing the middle part of the elastic piece to deform towards the ejector rod. Through the elastic restoring force of the elastic piece itself, the elastic piece always contacts the common contact piece, the normally open contact piece, or the normally closed contact piece, ensuring the stability of electrical conduction. Moreover, since the elastic piece is inclined from the middle towards the outer surface of the ejector rod, when the ejector rod drives the drum spring to move up and down, it plays a guiding role when the inclined surface of the elastic piece contacts the normally open contact piece or the normally closed contact piece, ensuring that the middle part of the elastic piece can stably contact the corresponding normally open contact piece or normally closed contact piece.

[0064] Furthermore, for the convenience of processing the drum spring, a notch 15 is provided in the middle of the drum spring. The inner end and the outer end of the notch are respectively connected to the inner surface and the outer surface of the drum spring, and the top and bottom of the notch are connected to the top and bottom surfaces of the drum spring. After being made into a sheet structure in this way, it is then curled into a ring structure, which is convenient for processing. Of course, it can also be directly made into a ring structure without setting a notch.

[0065] See Figure 7 、 9 As shown, two convex rings 16 are provided at intervals on the outer surface of the middle part of the ejector rod 2. The conductive connector 6 is sleeved outside the ejector rod 2 between the two convex rings 16, and the outer diameter of the outer surface of the middle part of the conductive connector 6 is greater than the outer diameter of the convex ring 16.

[0066] In this embodiment, the drum spring is directly sleeved on the outer surface of the ejector rod between the two convex rings. When the drum spring is in its natural state, that is, when the elastic piece is not squeezed and deformed, the length of the drum spring is slightly less than the distance between the two convex rings. When the middle part of the elastic piece of the drum spring is squeezed and deformed by the corresponding common contact piece, normally closed contact piece or normally open contact piece, the connecting rings at both ends will move away from each other, so that the connecting rings at both ends approach the corresponding convex rings respectively or abut against the corresponding convex rings, and the circumferential movement and deformation space of the drum spring are restricted by the convex rings. At the same time, due to the existence of the convex rings, its deformation is restricted, which can prevent the drum spring from deforming excessively, that is, the inward deformation of the middle part of the elastic piece will be limited by the connecting ring and the convex ring, so as to ensure that the outer surface of the drum spring can always and stably contact the common contact piece, normally open contact piece and normally closed contact piece, and ensure the stability of electrical conduction. Moreover, the two convex rings can axially limit the drum spring, so that when the ejector rod moves axially, the drum spring is driven to move axially along with the ejector rod through the convex rings.

[0067] At the same time, due to the existence of the convex ring, when the spring is in the extended state, the upper convex ring abuts against the inner wall of the top of the chamber. There is a through hole 17 communicating with the chamber on the top of the upper shell. The outer diameter of the upper part of the ejector rod is less than or equal to the diameter of the through hole. The top of the top cover passes through the through hole and is located above the top of the shell. The diameter of the convex ring is greater than the diameter of the through hole, so that the upward moving distance of the ejector rod can be limited, and when the spring is in the extended state, the conductive connecting piece always contacts the normally closed contact piece and the common contact piece.

[0068] Wherein, the bottom of the spring abuts against the inner wall of the bottom of the shell, and the top of the spring abuts against the ejector rod. In this embodiment, the top of the spring abuts against the bottom surface of the ejector rod. The bottom of the chamber of the shell is a cylindrical chamber. The spring is located in the cylindrical chamber, and the bottom of the ejector rod is inserted into the cylindrical chamber. In this way, the assembly of the spring is convenient and fast, and it also ensures that the spring always abuts against the bottom surface of the ejector rod and always gives the ejector rod an upward movement. Of course, the upper part of the spring can also be sleeved on the outer surface of the lower part of the ejector rod. At this time, the top of the spring abuts against the upper convex ring above, giving the ejector rod an upward thrust. It can also be in other forms, as long as the spring can give the ejector rod an upward thrust and drive the ejector rod to move upward.

[0069] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0070] In the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral one; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, for example, the two can form a mechanical abutment or abutment connection through abutment, contact, etc., the two can also be directly hung or hung through an intermediate medium, etc., or it can be the internal connection of the two elements or the interaction relationship between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Claims

1. A travel switch, comprising a housing and a brake mechanism disposed in the housing, characterized in that: The braking mechanism includes a push rod, a common contact, a normally closed contact, a normally open contact and a conductive connector. The push rod is movably connected to the housing, and the conductive connecting member is installed on the middle outer surface of the push rod; The upper parts of the common contact, the normally closed contact and the normally open contact are arranged in a housing outside the top rod, the outer surface of the conductive connector is always in contact with the upper side wall of the common contact, and the conductive connector is used to electrically connect the common contact with the normally open contact or to electrically connect the common contact with the normally closed contact; A spring is also provided to give the push rod an upward thrust; When the spring is in the extended state, the push rod moves upward, the outer wall of the conductive connector contacts the side walls of the normally closed contact and the common contact respectively, the conductive connector does not contact the normally open contact, and the conductive connector electrically conducts the normally closed contact and the common contact; When the push rod moves downward and compresses the spring, the conductive connector is not in contact with the normally closed contact, and the outer wall of the conductive connector is in contact with the side walls of the normally open contact and the common contact respectively, and the conductive connector electrically connects the normally open contact and the common contact.

2. The travel switch according to claim 1, characterized in that: When the conductive connecting member is in contact with the normally open contact piece, the conductive connecting member is not in contact with the normally closed contact piece; When the conductive connecting member is in contact with the normally open contact piece, the conductive connecting member is not in contact with the normally closed contact piece.

3. The travel switch according to claim 1, characterized in that: The top of the push rod is exposed at the top of the shell; And / or, the bottoms of the common contact, the normally closed contact and the normally open contact are exposed at the bottom of the shell.

4. The travel switch according to claim 1, characterized in that: The shell comprises an upper shell and a lower shell, the outer side wall of the lower shell is provided with at least two buckles, the outer side wall of the upper shell is provided with a slot matched with the buckles, and the upper shell and the lower shell are snap-fitted with each other through the buckles and the slots.

5. The travel switch according to claim 1, characterized in that: The conductive connecting member comprises a drum spring, the drum spring sleeve is mounted on the middle outer surface of the top rod, and the middle outer surface of the drum spring is always in contact with the side wall of the common contact piece.

6. The travel switch according to claim 5, characterized in that: When the push rod moves upward, the middle outer surface of the drum spring contacts the upper side wall of the normally closed contact piece; When the push rod moves downward, the middle outer surface of the drum spring contacts the upper side wall of the normally open contact piece.

7. The travel switch according to claim 6, characterized in that: The distance between the middle outer surface of the drum spring in the natural state and the outer surface of the push rod is greater than the distance between the side walls of the common contact piece, the normally open contact piece, and the normally closed contact piece and the outer wall of the push rod.

8. The travel switch according to claim 1, characterized in that: Two spaced convex rings are arranged on the middle outer surface of the push rod, the conductive connector is sleeved on the outside of the push rod between the two convex rings, and the outer diameter of the middle outer surface of the conductive connector is greater than the outer diameter of the convex rings.

9. The travel switch according to claim 1, characterized in that: The bottom of the spring abuts against the inner wall of the bottom of the shell, and the top of the spring abuts against the push rod.

10. A power connector, comprising a socket, characterized in that: The socket is provided with a travel switch as described in any one of claims 1 to 9; And / or, it also includes a plug that is plugged into the socket, and the plug is provided with a pin that cooperates with the travel switch.

Images