Travel switch and travel switch assembly

Abstract

The invention relates to a button switch of which a contact recovers to an initial state after an operating force is eliminated, in particular to a travel switch and a travel switch assembly. According to the novel travel switch provided by the invention, the short circuit piece is pushed by the elastic piece in a natural state and is kept in a state that the two wiring terminals jointly abut against each other, the two wiring terminals are conducted, and the short circuit piece is pushed back to move in a travel in which the trigger piece moves backwards under the action of external force, so that the short circuit piece is separated from the two wiring terminals; in this way, the state change of the loop connected with the two wiring terminals from the on state to the off state is achieved, and therefore position signal detection is achieved. According to the travel switch, the short-circuit piece is in abutting contact with the wiring terminal, so that the short-circuit piece can be separated from the wiring terminal by moving for a small stroke, signal switching can be realized without a large distance, and the size of the travel switch is small. When the connector is used for plugging a self-detection connector, the axial length of the connector can be reduced.

Description

Technical Field

[0001] The invention relates to a button switch whose contacts restore to an initial state when the operating force is eliminated, and in particular to a travel switch and a travel switch assembly. Background Art

[0002] At present, many occasions require connectors that can self-detect the plug-in and unplug status. When realizing the plug-in and unplugging self-detection function of the connector, the existing method is often to integrate a travel switch component inside the socket, such as a socket and an industrial connector disclosed in the Chinese utility model patent with the authorization announcement number CN214280355U, in which a guide rod is movably installed in the plug-in direction in the internal body of the socket (i.e., the insulator installed inside the shell and the plug-in component installed in the insulator), and a travel switch is arranged on the rear side of the internal body in the socket shell. The front end of the guide rod is a free end, and the rear end cooperates with the contact of the travel switch. When the plug is inserted into the socket, the guide rod is pushed back by the plug and triggers the travel switch, thereby obtaining the plug-in status information of the plug and socket. In some occasions, the axial size of the connector, that is, the plug-in size, is required to be as small as possible. In this case, in addition to shortening the axial length of the internal body of the connector as much as possible, whether the axial length of the travel switch can be shortened is also very critical.

[0003] Different types of connectors capable of plugging and unplugging self-detection adopt different travel switch structures in combination with the internal structure of the connector, the direction of the lead wire of the travel switch, etc. When a travel control switch disclosed in a Chinese invention patent application with application publication number CN103594272A is used in a plugging and unplugging self-detection connector, when the pin shorting plate moves, the signal circuit is turned on and off by plugging and disengaging the pins connected to the pin shorting plate and the fixed sockets in the housing. Therefore, it is necessary to reserve a distance in the housing for the pins and the sockets to be completely disengaged, resulting in a large space occupied in the axial direction, which in turn leads to the axial size of the connector not being well controlled. Summary of the invention

[0004] The purpose of the present invention is to provide a travel switch to solve the problem that the existing travel switch has a large axial size. At the same time, the purpose of the present invention is also to provide a travel switch assembly including the above travel switch to solve the problem that the existing travel switch has a large axial size.

[0005] A travel switch of the present invention comprises a switch housing, a triggering member is movably installed in a guide in the switch housing, a floating short-circuit structure is movably installed in a guide in the switch housing, the floating short-circuit structure is located at the rear side of the triggering member, the floating short-circuit structure comprises a short-circuit member and a retaining spring that provides elastic force to the short-circuit member toward one side of the triggering member, a pair of wiring terminals are also fixedly installed in the housing, the wiring terminals have a contact portion located at the front side of the short-circuit member, in a natural state, the retaining spring pushes the short-circuit member and keeps the contact portions of the short-circuit member and the two wiring terminals in contact with each other to conduct the two wiring terminals, and in the process of the triggering member being forced to move backward, the triggering member pushes back the short-circuit member to separate it from the two wiring terminals, and the two wiring terminals are disconnected.

[0006] Furthermore, the contact portion is an elastic terminal that can be elastically deformed in the front-rear direction, and the elastic terminal is installed in the switch housing, and its rear end is elastically abutted against the short-circuit piece.

[0007] Furthermore, the elastic terminal is a wool button contact or a spring pin.

[0008] Furthermore, the paired wiring terminals are symmetrically arranged about the trigger member.

[0009] Furthermore, the wiring terminal also includes a wiring member extending backwards from the trigger member, the rear end of the wiring member is a wiring terminal, and the front end of the wiring member is electrically connected to the front end of the contact portion.

[0010] Furthermore, the wiring member is an L-shaped contact member, a straight line side of the L-shaped contact member extends front and back, and the rear end is the wiring terminal, and the other straight line side extends toward the contact part and is connected to the front end of the contact part.

[0011] Furthermore, the switch housing includes a cylindrical outer shell, in which the trigger member is movably installed in a guiding manner in the cylindrical outer shell, and an assembled inner shell is fixedly installed in the inner cavity of the cylindrical outer shell on the rear side of the trigger member. The assembled inner shell includes a cylindrical inner shell with an open front end and a front inner shell sealed at the front end of the cylindrical inner shell. The floating short-circuit structure is installed in the inner shell mounting cavity surrounded by the cylindrical inner shell and the front inner shell, the contact part is fixedly installed in the front inner shell, and the rear end is exposed from the inner shell mounting cavity, and a transmission channel is provided on the front inner shell for transmitting the action of the trigger member backward to the short-circuit member.

[0012] Furthermore, the front inner shell is provided with a wiring assembly mounting hole for the front and rear extending straight edges of the L-shaped contact to be installed, and the front side surface of the front inner shell is also provided with a mounting groove, and the other straight edge of the L-shaped contact is located in the mounting groove. The assembled inner shell also includes a front blocking plate located at the front end of the front inner shell for pressing and fixing the L-shaped contact in the front inner shell.

[0013] Furthermore, the inner cavity of the cylindrical outer shell has an inner step surface facing backwards, the assembled inner shell is installed in the inner cavity of the cylindrical outer shell and the front blocking plate is in contact with the inner step, and a retaining ring is also installed in the inner cavity of the cylindrical outer shell to stop the assembled inner cavity from the rear side.

[0014] Furthermore, the short-circuit component is connected to an insulating transmission component, which is located at the rear side of the trigger component and is isolated from the trigger component in a natural state.

[0015] The present invention provides a new travel switch, in which a short-circuit is pushed by an elastic member in a natural state and maintained in a state of abutting two terminals, so that the two terminals are turned on. When the trigger member is subjected to an external force and moves backward, the short-circuit is pushed back and moves, thereby separating from the two terminals. In this way, the circuit connected to the two terminals changes from being turned on to being cut off, thereby realizing position signal detection. In this travel switch, the short-circuit and the terminals are in abutting contact relationship, so the short-circuit can be separated from the terminals by moving a small stroke, and signal switching can be achieved without a large distance, and the size of the travel switch is small. When used for plugging and unplugging a self-detecting connector, the axial length of the connector can be reduced.

[0016] The travel switch assembly of the present invention includes a driving component and a travel switch located at the rear side of the driving component. The travel switch includes a switch housing, a triggering member is movably installed in the switch housing, the triggering member has a driven end located at the front side of the switch housing, the driving component is connected to the triggering member, a floating short-circuit structure is movably installed in the switch housing, the floating short-circuit structure is located at the rear side of the triggering member, the floating short-circuit structure includes a short-circuit member and a retaining spring that provides elastic force to the short-circuit member toward one side of the triggering member, and a pair of wiring terminals are also fixedly installed in the housing, the wiring terminals have a contact portion located at the front side of the short-circuit member, and in a natural state, the spring is kept pushing the short-circuit member and the contact portions of the short-circuit member and the two wiring terminals are kept in contact with each other to conduct the two wiring terminals. In the process of the triggering member being forced to move backward, the triggering member pushes back the short-circuit member to separate it from the two wiring terminals, and the two wiring terminals are disconnected.

[0017] Furthermore, the contact portion is an elastic terminal that can be elastically deformed in the front-rear direction, and the elastic terminal is installed in the switch housing, and its rear end is elastically abutted against the short-circuit piece.

[0018] Furthermore, the elastic terminal is a wool button contact or a spring pin.

[0019] Furthermore, the paired wiring terminals are symmetrically arranged about the trigger member.

[0020] Furthermore, the wiring terminal also includes a wiring member extending backwards from the trigger member, the rear end of the wiring member is a wiring terminal, and the front end of the wiring member is electrically connected to the front end of the contact portion.

[0021] Furthermore, the wiring member is an L-shaped contact member, a straight line side of the L-shaped contact member extends front and back, and the rear end is the wiring terminal, and the other straight line side extends toward the contact part and is connected to the front end of the contact part.

[0022] Furthermore, the switch housing includes a cylindrical outer shell, in which the trigger member is movably installed in a guiding manner in the cylindrical outer shell, and an assembled inner shell is fixedly installed in the inner cavity of the cylindrical outer shell on the rear side of the trigger member. The assembled inner shell includes a cylindrical inner shell with an open front end and a front inner shell sealed at the front end of the cylindrical inner shell. The floating short-circuit structure is installed in the inner shell mounting cavity surrounded by the cylindrical inner shell and the front inner shell, the contact part is fixedly installed in the front inner shell, and the rear end is exposed from the inner shell mounting cavity, and a transmission channel is provided on the front inner shell for transmitting the action of the trigger member backward to the short-circuit member.

[0023] Furthermore, the front inner shell is provided with a wiring assembly mounting hole for the front and rear extending straight edges of the L-shaped contact to be installed, and the front side surface of the front inner shell is also provided with a mounting groove, and the other straight edge of the L-shaped contact is located in the mounting groove. The assembled inner shell also includes a front blocking plate located at the front end of the front inner shell for pressing and fixing the L-shaped contact in the front inner shell.

[0024] Furthermore, the inner cavity of the cylindrical outer shell has an inner step surface facing backwards, the assembled inner shell is installed in the inner cavity of the cylindrical outer shell and the front blocking plate is in contact with the inner step, and a retaining ring is also installed in the inner cavity of the cylindrical outer shell to stop the assembled inner cavity from the rear side.

[0025] Furthermore, the short-circuit component is connected to an insulating transmission component, which is located at the rear side of the trigger component and is isolated from the trigger component in a natural state.

[0026] Furthermore, the driving component is a driven ring body, the triggering component is a triggering rod, and the front end of the triggering rod is connected to a certain point in the circumference of the driven ring body.

[0027] Furthermore, there are more than two travel switches connected to the rear side of the driven ring body.

[0028] Furthermore, the driven ring body includes a connecting ring body and a rotating ring body. The rotating ring body is arranged on the front side of the connecting ring body and rotates around its own axis. The connecting ring body is connected to the mounting rod.

[0029] Furthermore, the driven ring body includes a thrust bearing, of which the two thrust washers on the front side constitute the rotating ring body, and the two thrust washers on the rear side constitute the connecting ring body, and the driven ring body also includes a retaining member for maintaining a certain front-to-rear distance between the two thrust washers.

[0030] Furthermore, the connecting ring body is provided with a radially penetrating screw hole and a connecting hole extending backward from the screw hole to the rear end surface of the connecting ring body. The front end of the mounting rod extends into the screw hole from the connecting hole, and a locking nut is connected to the end extending into the screw hole.

[0031] The present invention provides a new travel switch assembly, in which the short-circuit of the travel switch is pushed by an elastic member in a natural state and maintained in a state of abutment between two wiring terminals, so that the two wiring terminals are turned on. In the stroke in which the driving component drives the trigger member to move backward, the short-circuit is pushed back and moved, thereby separating from the two wiring terminals, so that the state of the circuit connected by the two wiring terminals changes from being turned on to being turned off, thereby realizing position signal detection. In this travel switch, the short-circuit and the wiring terminals are in abutment contact relationship, so the short-circuit can be separated from the wiring terminals by moving a small stroke, and signal switching can be realized without a large distance, and the size of the travel switch is small. When used for plugging and unplugging a self-detecting connector, the axial length of the connector can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a plug-in self-detecting connector including a travel switch assembly of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the connector from the rear side; Figure 3 A schematic structural diagram showing how the travel switch assembly of the present invention is installed in the main housing of the connector after the connecting flange and the tail housing component of the connector are hidden; Figure 4 A structural schematic diagram showing the assembly relationship between the travel switch assembly and the tail housing component of the present invention after the main housing and the connecting flange of the connector are hidden; Figure 5 It is a structural schematic diagram of the travel switch assembly of the present invention; Figure 6 for Figure 5 A cross-sectional view of the main part of the mid-travel switch; Figure 7 for Figure 5 A cross-sectional view of the middle drive component; Figure 8 The figure is a schematic structural diagram of a travel switch of the present invention.

[0033] In the figure: 1, internal body; 2, connector shell; 20, main shell; 3, driving component; 30, driven ring body; 31, mounting rod; 32, reset spring; 301, connecting ring body; 302, rotating ring body; 303, retaining member; 310, outer flange; 311, trigger end; 4, travel switch; 40, switch body; 90, tail shell component; 41, wiring member; 43, short-circuit member; 44, gap; 45, cylindrical shell; 46, retaining ring; 47, front end plate; 48, universal plug ring; 49, sealing ring; 401, cylindrical inner shell; 402, front inner shell; 403, front blocking plate; 410, L-shaped contact; 411, elastic terminal; 430, retaining spring; 431, insulating transmission member; 4101, another straight edge. DETAILED DESCRIPTION

[0034] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0035] The travel switch of the present invention aims to solve the problem that in the existing travel switch, the short-circuit piece and the paired wiring terminals are connected by plugging in and disconnected by plugging in a pin and a socket, which results in the short-circuit piece of the travel switch needing to move a large distance to realize signal switching, and the travel switch occupies a large space. By improving the matching mode between the short-circuit piece and the paired wiring terminals into an abutment matching mode, the short-circuit piece can be in contact with and disengaged from the paired wiring terminals when it moves a very small distance, thereby realizing the on-off signal switching of the travel switch and reducing the size of the travel switch.

[0036] In view of the fact that the present invention originates from how to reduce the axial size of the travel switch when the travel switch is used in a plug-in self-detecting connector, in order to facilitate and clearly describe the travel switch and the travel switch assembly of the present invention, the state of the travel switch assembly applied in a plug-in self-detecting connector is used as an example for explanation below.

[0037] An embodiment of a travel switch assembly is used when plugging and unplugging a self-detecting connector, such as Figure 1-4 As shown, the plug-in self-detecting connector includes a connector shell 2 and an internal body 1, the connector shell 2 includes an outer shell and a tail shell component 90 connected to the rear side of the outer shell, the outer shell includes an annular main shell 20 arranged around the outside of the internal body 1, the internal ring hole of the annular main shell constitutes a main body assembly hole for installing the internal body, the main shell 20 has a locking sleeve extending forward on the periphery of the main body assembly hole for threadedly cooperating with the connecting nut of the adapter connector to achieve a locking connection, the tail shell component 90 is connected to the rear side of the main shell 20 to cover the internal body 1 inside, and the travel switch assembly is installed on the main shell 20.

[0038] Specifically, the travel switch assembly includes a travel switch 4 and a driving component 3. The driving component 3 is located radially outside the locking sleeve and has a driven end located on the front side of the housing and radially outside the locking sleeve. A trigger member for cooperating with the travel switch 4 is connected to the rear side of the driving component. The rear end of the trigger member has a trigger end 311. The travel switch 4 is located on the rear side of the trigger end. The trigger end is used to trigger the travel switch to switch its state during the backward movement of the trigger member. The driving component 3 is provided with a return spring 32 which provides an elastic force toward the front side thereof, and the outer shell has an anti-detachment stop structure for stopping the driving component 3, which can stop the driving component 3 at the front limit position when the return spring 32 provides an elastic force to push the driving component 3 forward. The driven end of the driving component 3 is used to be pushed back when the adapter connector is inserted, and the trigger end 311 retreats with the driven end and changes the on-off state of the travel switch 4, that is, changes from the circuit-on state to the circuit-off state. When the adapter connector is pulled out, the return spring 32 pushes the driving component 3 forward to the front limit position and changes the on-off state of the travel switch 4 again.

[0039] like Figure 1-4 In the embodiment shown, the driving component 3 includes a driven ring body 30, and a mounting rod 31 is connected to the rear side of the driven ring body 30. As the name implies, the driven ring body 30 is an annular structure driven by the adapter connector. The driven ring body 30 is arranged around the internal main body 1 and its front end constitutes the driven end. That is to say, when the adapter connector is plugged in, the adapter connector can push the front end annular surface of the driven ring body 30 and push it to move backward. The housing is provided with a mounting rod through hole for the mounting rod 31 to pass from front to back. The travel switch assembly is installed on the housing by means of the mounting rod 31. Specifically, the mounting rod through hole 200 is a stepped hole with a small front and a large rear. The front end of the mounting rod 31 is in the small diameter section of the mounting rod through hole. The rear position of the mounting rod 31 has an outer flange 310. The step surface of the stepped hole is used to cooperate with the outer flange 310 for blocking. The rear end large diameter section of the mounting rod through hole accommodates the reset spring 32. The step surface of the stepped hole is used to achieve anti-slip blocking in the forward direction. Of course, the driving component in one embodiment can be a linear rod-shaped structure, i.e., a driving rod, like the guide rod in a socket and an industrial connector disclosed in the Chinese utility model patent with authorization announcement number CN214280355U cited in the background technology. The driving rod is installed in the shell in a guiding manner in the front and rear directions. The front end of the guide rod extends to the front side of the shell and the side of the plug-in section, which is the driven end. The rear end of the guide rod extends into the shell, and the part extending into the shell is the trigger member. The rear end of the trigger member is provided with a trigger end 311, which corresponds to the contact of the travel switch 4 arranged in the shell. The guide rod is provided with an outer convex ring, and a reset spring 32 is installed in the shell and is sleeved on the outside of the guide rod. The front end of the reset spring 32 presses against the outer convex ring, and the rear end presses against the shell.

[0040] The number of travel switches included in the travel switch assembly can be one, and the travel switch corresponds to the front and rear of the driven ring body, and is connected to a mounting rod corresponding to the rear side of the driven ring body, and the mounting rod constitutes a triggering member of the travel switch, or Figure 1-5 In the embodiment shown, there are two travel switches, which are spaced apart in the circumferential direction of the driven ring body, and each travel switch corresponds to a mounting rod, and the mounting rod corresponding to each travel switch constitutes a triggering member of the travel switch. When the same driven ring body moves forward and backward, the two travel switches are triggered to switch states at the same time.

[0041] The travel switch 4 includes a switch housing, in which a trigger is installed in a guide motion. Figure 1-5 What is shown is a schematic diagram of the structure of the travel switch assembly applied in a connector, so the switch housing is realized with the help of the connector shell. Figure 6 The structure behind the shell of the hidden connector (which can be understood as the structure of the travel switch behind the hidden switch housing) is shown. The switch housing contains a switch body 40, which has an inner shell mounting cavity. A floating short-circuit structure is installed in the inner shell mounting cavity to be guided and movably installed in the front-to-back direction. The floating short-circuit structure is located on the rear side of the trigger member. The floating short-circuit structure includes a short-circuit member 43 and a retaining spring 430 that provides elastic force to the short-circuit member 43 toward one side of the trigger member. A pair of wiring terminals are also fixedly installed in the switch body 40. The wiring terminals have a contact portion located on the front side of the short-circuit member 43. In a natural state, the spring is kept pushing the short-circuit member 43 and keeping the contact portions of the short-circuit member 43 and the two wiring terminals in contact with each other to conduct the two wiring terminals. In the process of the trigger member being forced to move backward, the trigger member pushes back the short-circuit member 43 to separate it from the two wiring terminals, and the two wiring terminals are disconnected to realize the switching of the travel switch signal.

[0042] Based on this structure, it can be known that the short-circuit and the two terminals are in contact and remain conductive, so the short-circuit can be separated from the terminals by moving a small stroke, and the signal switching can be achieved without a large distance, and the size of the travel switch is small. In this way, the axial length of the travel switch is reduced, and when it is used in the plug-in self-detecting connector, it occupies less space in the axial direction, which can further reduce the axial size of the connector.

[0043] Of course, the short-circuit member can be moved and disconnected by abutting the short-circuit member and the contact part in front and back, but although this can reduce the size of the travel switch to the maximum, when it is used in a vibration environment, the short-circuit member and the contact part will not be in stable contact due to vibration, which is obviously undesirable. Therefore, in order to take into account both size and stability, in one embodiment, the contact part adopts an elastic terminal 411 that can be elastically deformed in the front and back directions, and the elastic terminal is installed in the switch body, and its rear end is exposed from the front side cavity wall of the inner shell mounting cavity. The short-circuit member 43 is pressed against the front side cavity wall of the inner shell mounting cavity by the retaining spring 430 in a natural state, and abuts against the rear end of the elastic terminal 411. In this way, in a vibration environment, the elastic terminal can ensure that the short-circuit member and the contact part maintain a reliable contact state, and the travel switch is not prone to false alarm signals. The elastic terminal 411 can adopt a wool button contact or a spring pin contact, which has a good axial elastic deformation ability and can be made into a smaller size.

[0044] In one embodiment, the paired terminals are installed in the switch body and are located on the same side of the trigger member. Figure 6 In the illustrated embodiment, the paired connection terminals are symmetrically arranged about the trigger member, so that the short-circuit member can be arranged coaxially with the trigger member as much as possible. When the trigger member drives the short-circuit member to move, the positional relationship between the short-circuit member and the two connection terminals is more consistent.

[0045] Based on the above embodiments, this article also provides a better embodiment, such as Figure 6 As shown, the wiring terminal also includes a wiring member 41 extending away from the trigger member, the rear end of the wiring member 41 is a wiring terminal, and the front end of the wiring member 41 is electrically connected to the front end of the contact portion, that is, the entire wiring terminal is a folded structure or a U-shaped structure, so that the wiring terminal shares an axial space with the short-circuit member 43 and the trigger member, further reducing the axial size of the travel switch. Specifically, the entire wiring terminal may include a first parallel section, a second parallel section, and a connecting section connecting the front ends of the two parallel sections, the end of the second parallel section is exposed from the front side cavity wall of the inner shell mounting cavity, and the end of the first parallel section passes from the radially outer side of the inner shell mounting cavity and is exposed from the rear end of the switch body for wiring. Alternatively, in the case of Figure 6 In the illustrated embodiment, the terminal 41 is an L-shaped contact 410, a straight line side of the L-shaped contact 410 extends forward and backward, and the rear end is the terminal, and another straight line side 4101 extends toward the contact portion and is connected to the front end of the contact portion.

[0046] Based on the above two embodiments, during manufacturing, the switch body is integrally injection molded, the terminal is cast in the injection molded insulator, and a transmission channel is provided on the switch body for transmitting the action of the trigger member to the short-circuit member. Figure 6 As shown, the switch body includes an assembled inner shell, and the assembled inner shell includes a cylindrical inner shell 401 with an open front end and a front inner shell 402 sealed at the front end of the cylindrical inner shell 401. The floating short-circuit structure is installed in the inner shell installation cavity surrounded by the cylindrical inner shell 401 and the front inner shell 402. The contact part is fixedly installed in the front inner shell 402, and the rear end is exposed from the inner shell installation cavity. The front inner shell 402 is provided with a transmission channel for transmitting the action of the trigger member backward to the short-circuit member. At this time, the wiring terminal can be integrally injection-molded in the front inner shell 402, and a through hole is provided on the cylindrical inner shell 401 at a position corresponding to the wiring terminal, for the wiring terminal to pass through from front to back and expose the wiring terminal. Or, as Figure 6 In the embodiment shown, the front inner shell 402 is provided with a wiring member installation hole for the front and rear extended straight edges of the L-shaped contact 410 to be installed, and the front side of the front inner shell 402 is also provided with a mounting recessed groove, and the other straight edge 4101 of the L-shaped contact 410 is located in the mounting recessed groove. The assembled inner shell also includes a front blocking plate 403 at the front end of the front inner shell 402 to press and fix the L-shaped contact 410 in the front inner shell 402. The front blocking plate 403 is provided with an avoidance hole in the middle position, and the avoidance hole and the hole at the center position of the front inner shell 402 together constitute a transmission channel. The floating short-circuit structure and the wiring terminal are assembled in the switch body by assembling the cylindrical inner shell 401, the front inner shell 402 and the front blocking plate 403.

[0047] The main housing of the connector is provided with an installation cavity for installing the switch body, the installation cavity has a front cavity wall, the installation rod through-hole extends to the front cavity wall of the installation cavity, so that the installation rod can extend forward into the installation rod through-hole, and a limiting member is connected to the rear end of the installation cavity on the main housing, and the rear end of the switch body is stopped by the limiting member so that it can be fixedly assembled in the installation cavity as a whole.

[0048] On the basis of the above embodiments, the trigger member can be directly connected to the short-circuit member, that is, the trigger member can synchronously drive the short-circuit member to move forward and backward during the process of the trigger member moving forward and backward. Or in one embodiment, the trigger member and the short-circuit member are not directly connected, and there is a certain transmission gap between the trigger member and the short-circuit member, that is, the trigger member does not move synchronously with the short-circuit member during the entire movement process, but moves synchronously with the short-circuit member during a certain section of the movement. This can also avoid accidentally touching the travel switch due to vibration or slight movement of the trigger member. Figure 6 In the illustrated embodiment, an insulating transmission member 431 is connected to the short-circuit member. The insulating transmission member 431 is located at the rear side of the trigger member and is isolated from the trigger member in a natural state. A gap 44 is provided between the insulating transmission member 431 and the trigger end 311 of the trigger member. The mounting rod 31, i.e., the trigger member, drives the short-circuit member 43 to move by pushing the insulating transmission member 431.

[0049] The short-circuit 43 is a stepped shaft structure, with a connection hole on the end face of the large diameter section, the rear end of the insulating transmission member 431 extends into the connection hole and is connected to the short-circuit 43, the retaining spring 430 is sleeved outside the small diameter section and the front end is pressed against the step surface, the rear end is pressed against the rear side wall of the inner shell installation cavity, and the end face of the large diameter section is in contact with the contact portion. In this way, other structures are radially symmetrically arranged with the installation rod 31, the insulating transmission member and the short-circuit 43, which are coaxially arranged structural members, as the center, and the radial occupied space can be reduced as much as possible.

[0050] The driven ring body 30 can be a common integrated ring body structure. In the plug-in self-detecting connector, when the adapter plug and the socket are locked and connected, the locking nut of the adapter plug gradually pushes the driven ring body 30 during the process of being screwed onto the locking sleeve. At this time, since the locking nut is rotating forward, in order to reduce the friction resistance of the locking nut during the rotation process and avoid the driven ring body 30 from being worn, Figure 4-5 In an embodiment shown in FIG. 7 , the driven ring body 30 includes a connecting ring body 301 and a rotating ring body 302. The rotating ring body 302 is arranged on the front side of the connecting ring body 301 and rotates around its own axis. The connecting ring body 301 is connected to the mounting rod 31, and the front end surface of the rotating ring body 302 constitutes the driven end. In this way, when the locking nut presses against the rotating ring body 302 and pushes it to move backward, the rotating ring body 302 itself can rotate, which reduces the friction between the locking nut and the driven ring body 30 to a certain extent.

[0051] There is no limitation on the relative rotational assembly method between the swivel ring body 302 and the connecting ring body 301. For example, the connecting ring body 301 is a circular ring with a square cross section, and the swivel ring body 302 is a ring structure formed by bending a thin wall, and the cross section is a C-shaped opening facing backwards. The C-shaped opening avoids the connection between the mounting rod 31 and the connecting ring body 301. The swivel ring body 302 is wrapped outside the connecting ring body 301 and can freely rotate relative to the swivel ring body 302. Figure 7In one embodiment shown, the driven ring body 30 includes a thrust bearing, and the two thrust washers of the thrust bearing, the one on the front side, constitutes the rotating ring body 302, and the one on the rear side constitutes the connecting ring body 301. The existing mature thrust bearing is used to form the rotating ring body 302 and the connecting ring body 301, which is convenient to obtain materials and simple to manufacture. In order to prevent the two thrust washers from spreading freely, the driven ring body 30 in this embodiment also includes a retaining member 303 that maintains a certain front-to-back distance between the two thrust washers. It can be seen from the figure that the retaining member 303 used in this embodiment is a retaining sleeve, and the rear end of the retaining sleeve is forcibly connected to the outer peripheral surface of the connecting ring body 301, and the front end forms an inverted edge inwardly and blocks the rotating ring body 302. It can also be seen from the figure that the outer edge of the front end face of the rotating ring body 302 is provided with an annular groove, the inverted edge is in the annular groove, and the front side surface is not higher than the front end face of the rotating ring body 302, so as to avoid interference with the locking nut of the adapter connector.

[0052] There are many ways to connect the connecting ring body 301 and the mounting rod 31, such as welding, or setting a threaded hole on the rear end surface of the connecting ring body 301, setting a threaded section on the front end of the mounting rod 31, and connecting the mounting rod 31 to the connecting ring body 301 through threads. Figure 7 In the embodiment shown, the connecting ring body 301 is provided with a radially penetrating screw hole, and a connecting hole extending backward from the screw hole to the rear end face of the connecting ring body 301 is provided, and the front end of the mounting rod 31 has a small diameter section, which extends from the connecting hole into the screw hole, and a locking nut is connected to the end extending into the screw hole. The stop between the annular end face at the rear end of the small diameter section of the mounting rod 31 and the rear end face of the connecting ring body 301 can achieve positioning in the front-to-back direction, thereby ensuring the position accuracy of each mounting rod 31 when it is installed on the connecting ring body 301.

[0053] Embodiment of the travel switch of the present invention: In some embodiments, the specific structure of the travel switch is the same as the travel switch structure described in the travel switch assembly above, and will not be described in detail. The following focuses on describing another embodiment that is different from the travel switch in the travel switch assembly described above, such as Figure 8 shown.

[0054] In the above embodiment of the travel switch assembly, the switch body 40 is fixedly connected to the main housing of the connector, the mounting rod 31 is installed in the main housing, and the travel switch assembly mainly exists as a part of the connector, and the housing of the connector serves as the housing of the travel switch. Figure 8 As shown. Figure 8 A specific embodiment of a travel switch is shown with a switch housing.

[0055] In this embodiment, the switch housing of the travel switch is a cylindrical housing 45, the inner cavity of the cylindrical housing 45 is a three-level stepped inner cavity that is axially connected and has a small front and a large rear. The switch body 40 is installed in the rear end large diameter section. A retaining ring groove is provided near the rear side of the rear end large diameter section. The retaining ring 46 is installed in the retaining ring groove and limits the switch body 40 from the rear side, pressing the switch body 40 against the front step surface of the rear end large diameter section. The trigger member, i.e., the front section of the mounting rod 31, passes through the front small diameter section and extends into the cylindrical housing 45, so as to be pushed backward by other structures to trigger the switch body. The outer flange 310 provided on the mounting rod 31 is in the middle middle diameter section, and the reset spring 32 mounted on the mounting rod 31 presses the outer flange 310 from the rear side and presses it against the step surface on the front side of the middle middle diameter section.

[0056] In some use environments with sealing requirements, a sealing ring 49 is installed on the inner wall of the front small diameter section of the cylindrical housing 45. If a higher sealing requirement is required, the front end surface of the cylindrical housing 45 is provided with a sealing groove communicating with the inner hole, and a universal seal ring 48 is installed in the sealing groove. A front end plate 47 is fixedly installed on the front end surface of the cylindrical housing 45 by screws to keep the universal seal ring 48 in the sealing groove.

[0057] Although only two specific forms of switch housings are described in detail above, those skilled in the art should know that the structure of the switch housing can be adaptively changed as needed. From a functional point of view, it is only necessary to have a related structure that can fix the switch body and block the trigger from the front.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A travel switch, characterized in that: The switch housing comprises a switch casing, a triggering member is movably mounted in a guide in the switch casing, a floating short-circuit structure is movably mounted in the guide in the switch casing, the floating short-circuit structure is located at the rear side of the triggering member, the floating short-circuit structure comprises a short-circuit member (43) and a retaining spring (430) providing elastic force to the short-circuit member (43) toward one side of the triggering member, a pair of connecting terminals are also fixedly mounted in the casing, the connecting terminals have a contact portion located at the front side of the short-circuit member (43), in a natural state, the retaining spring (430) pushes the short-circuit member (43) and keeps the short-circuit member (43) and the contact portions of the two connecting terminals in contact with each other to conduct the two connecting terminals, and when the triggering member is forced to move backward, the triggering member pushes back the short-circuit member (43) to separate it from the two connecting terminals, thereby disconnecting the two connecting terminals.

2. The travel switch according to claim 1, characterized in that: The contact portion is an elastic terminal (411) that can be elastically deformed in the front-to-back direction. The elastic terminal (411) is installed in the switch housing, and its rear end is elastically abutted against the short-circuit piece (43).

3. The travel switch according to claim 2, characterized in that: The elastic terminal (411) is a wool button contact piece or a spring pin.

4. The travel switch according to any one of claims 1 to 3, characterized in that: The paired wiring terminals are symmetrically arranged about the triggering member.

5. The travel switch according to any one of claims 1 to 3, characterized in that the connection terminal It also includes a wiring member (41) extending backwards from the trigger member, the rear end of the wiring member (41) being a wiring terminal, and the front end of the wiring member (41) being electrically connected to the front end of the contact portion.

6. The travel switch according to claim 5, characterized in that: The wiring member (41) is an L-shaped contact member (410), wherein a straight line side of the L-shaped contact member (410) extends forward and backward, and the rear end is the wiring terminal, and another straight line side (4101) extends toward the contact portion and is abutted and connected with the front end of the contact portion.

7. The travel switch according to claim 6, characterized in that: The switch housing comprises a cylindrical outer shell (45), the triggering member is movably mounted in the cylindrical outer shell (45), an assembled inner shell is fixedly mounted in the inner cavity of the cylindrical outer shell (45) at the rear side of the triggering member, the assembled inner shell comprises a cylindrical inner shell (401) with an open front end and a front inner shell (402) sealed at the front end of the cylindrical inner shell (401), the floating short-circuit structure is mounted in the inner shell mounting cavity surrounded by the cylindrical inner shell (401) and the front inner shell (402), the contact portion is fixedly mounted in the front inner shell (402), and the rear end is exposed from the inner shell mounting cavity, and a transmission channel is provided on the front inner shell (402) for transmitting the action of the triggering member backwards to the short-circuit member (43).

8. The travel switch according to claim 7, characterized in that: The front inner shell (402) is provided with a mounting hole for a terminal piece (41) into which the straight edges extending forward and backward of the L-shaped contact piece (410) are mounted. The front side surface of the front inner shell (402) is also provided with a mounting recessed groove, in which the other straight edge (4101) of the L-shaped contact piece (410) is located. The assembled inner shell also includes a front blocking plate (403) located at the front end of the front inner shell (402) for pressing and fixing the L-shaped contact piece (410) in the front inner shell (402).

9. The travel switch according to claim 8, characterized in that: The inner cavity of the cylindrical outer shell (45) has an inner step surface facing backwards, the assembled inner shell is installed in the inner cavity of the cylindrical outer shell (45) and the front blocking plate (403) is in contact with the inner step, and a retaining ring (46) is also installed in the inner cavity of the cylindrical outer shell (45) to block the assembled inner cavity from the rear side.

10. The travel switch according to claim 7, characterized in that: The short-circuit component (43) is connected to an insulating transmission component (431), and the insulating transmission component (431) is located at the rear side of the trigger component and is isolated from the trigger component in a natural state.

11. A travel switch assembly, characterized in that: The invention comprises a driving component (3) and a travel switch (4) located at the rear side of the driving component (3), wherein the travel switch (4) is the travel switch (4) according to any one of claims 1 to 10, and the driving component (3) is connected to a triggering component.

12. The travel switch assembly according to claim 11, characterized in that: The driving component (3) is a driven ring body (30), the triggering component is a triggering rod, and the front end of the triggering rod is connected to a certain point in the circumferential direction of the driven ring body (30).

13. The travel switch assembly according to claim 12, characterized in that: There are more than two travel switches (4) connected to the rear side of the driven ring body (30).

14. The travel switch assembly according to claim 12, characterized in that: The driven ring body (30) comprises a connecting ring body (301) and a rotating ring body (302); the rotating ring body (302) is arranged to rotate around its own axis on the front side of the connecting ring body (301); and the connecting ring body (301) is connected to the mounting rod (31).

15. The travel switch assembly according to claim 14, characterized in that: The driven ring body (30) comprises a thrust bearing, wherein the two thrust washers of the thrust bearing, the one located at the front side constitutes a rotating ring body (302), and the one located at the rear side constitutes the connecting ring body (301), and the driven ring body (30) further comprises a retaining member (303) for maintaining a certain front-to-rear distance between the two thrust washers.

16. The travel switch assembly according to claim 15, characterized in that: The connecting ring body (301) is provided with a radially penetrating screw hole and a connecting hole extending backwards from the screw hole and penetrating to the rear end surface of the connecting ring body (301); the front end of the mounting rod (31) extends from the connecting hole into the screw hole, and a locking nut is connected to the end extending into the screw hole.

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