CN219321211U

CN219321211U - High-temperature-resistant oblique-pulling unlocking separation travel switch

Info

Publication number: CN219321211U
Application number: CN202320249852.9U
Authority: CN
Inventors: 黄春逢; 郑郑; 杨勇; 蔡昭文; 程贤科
Original assignee: G & A Technologies Co ltd
Current assignee: G & A Technologies Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-07-07
Anticipated expiration: 2033-02-20

Abstract

The utility model discloses a high-temperature-resistant oblique-pulling unlocking separation travel switch, which comprises an unlocking mechanism, a lock control component, a switch component and a socket, wherein the high-temperature-resistant Wen Chuhuang system, a high-temperature-resistant contact, a reed and a limit high-temperature-resistant connector are adopted by utilizing the structural principle of a sliding contact travel switch, and a high-temperature-resistant ceramic material is adopted as an insulating structure to realize reliable contact between the contact and a conductor and meet the capability of the switch for resisting the high temperature of 700 ℃ for 60 minutes; the unique layout of the lock control components can ensure the stability of the lock control; the umbrella-shaped lock cover enables the acting direction of the working acting force to realize 0-90-degree inclined-pulling unlocking, so that normal axial unlocking, locking and locking control of the switch can be realized; the contact and the conductor sliding line contact is realized by adopting the combination of the contact and the reed, the contact performance is reliable, and the stroke control is accurate; the spring guide post is arranged at the bottom of the lower end of the combined button, so that the switch is prevented from being over-pressed.

Description

High-temperature-resistant oblique-pulling unlocking separation travel switch

Technical Field

The utility model relates to the field of travel switches, in particular to a cable-stayed unlocking separation travel switch resistant to 700 ℃.

Background

At present, under a severe environment, the high temperature resistance of the high temperature mechanical travel switch is only below 600 ℃ for 30 minutes, the output form is basically a wiring terminal, the operation inconvenience can be brought to the application and test of motor equipment, and once the motor equipment fails, the troubleshooting difficulty is high. Meanwhile, as the oblique action axial angle of the axial action switch is generally within a range of +/-1.5 degrees, once the oblique action axial angle exceeds the range, the switch action mechanism is possibly deformed, the action mechanism is possibly blocked due to continuous pressure, and the installation and debugging requirements on the switch are high.

Disclosure of Invention

In order to overcome the defects pointed out in the prior art, the utility model breaks through the high-temperature resistance limit of the travel switch, and provides the high-temperature-resistant inclined pulling unlocking separation travel switch with axial and maximum 90-degree inclined separation unlocking capacity.

The technical scheme for realizing the aim of the utility model is as follows: by utilizing the structural principle of the sliding contact type travel switch, a high-temperature-resistant Wen Chuhuang system, a high-temperature-resistant contact, a reed and a limit high-temperature-resistant connector are adopted, and a high-temperature-resistant ceramic material is adopted as an insulating structure, so that the contact and a conductor can be reliably contacted, and the capability of the switch for resisting the high temperature of 700 ℃ for 60 minutes is met.

The utility model provides a high temperature resistant draws unblock separation travel switch to one side, includes release mechanism, accuse lock part, switch module and socket, wherein:

the release mechanism includes locking closure, hasp and guide post, locking closure and hasp fixed connection, and the hasp central line is two truncated cones of a straight line, wherein: the cone angle of the first cone frustum is smaller than the cone angle of the cone frustum close to the locking cover, and the two cone surfaces are smoothly transited through a curved surface; the center of the first cone frustum is matched with the combined button through a guide post, and the top surface of the first cone frustum is fixedly connected with the locking cover; the lock cover is an umbrella-shaped lock cover with a cone angle of 80-100 degrees;

the control lock component is arranged at the upper end of a bracket of the switch component and is formed by connecting an elastic mechanism and a base, the base is fixedly connected with the bracket, the spring mechanisms are arranged in the base, each elastic mechanism is perpendicular to the same plane of the longitudinal axis of the combination button and is radially arranged by taking the longitudinal axis of the combination button as the center, the front end of each elastic mechanism facing the center is contacted with the side surface of a lock hole at the upper end of the combination button, the center of the base is provided with an unlocking hole matched with a lock catch of the unlocking mechanism, and the unlocking hole is opposite to the lock catch at the upper end of the combination button;

the switch component comprises a bracket, a combined button and a reed group with a contact point, wherein the combined button is fixed on the bracket, the combined button is a middle-concave high-temperature-resistant ceramic insulator formed by brazing ceramics and metals into a whole, the upper end of the combined button is in sliding fit with the bracket, a spring and a spring guide post are arranged in a blind hole at the lower end of the combined button, a spring guide post bottom plate is fixed at the tail end of the bracket, a convex spring guide post is spliced with the spring, the other end of the spring is contacted with the bottom surface of the blind hole, conductive sheets are brazed in a groove of the ceramic insulator, and the conductive sheets are parallel to each other, and are parallel to each other;

the spring plate group with contact is formed by combining spring plates with contact points and wiring lugs, is directly connected with a high-temperature-resistant cable, is internally connected with each spring plate with contact points, is respectively connected with conductive plates, enables the conductive plates in the combined buttons to be contacted with and separated from contacts by pressing the combined buttons to realize circuit conversion, and is connected with the spring plates in a spot welding way, so that the contact of the spring plates and the conductive plates forms line contact, is arranged in a ceramic spring seat and is connected in a combined way through a ceramic insulation structure to form contact spring systems which are symmetrically distributed on the left side and the right side of a bracket and are connected with lead-out ends on the spring plate group with contact points in a crimping way through high-temperature cables;

the ceramic spring seat and the spring seat cover are symmetrically arranged on two sides of the support and are fixed with the reed group with the contact point in an insulating manner, the contacts of the reed group with the contact point are contacted with the surface of the conducting strip through the combined button, the upper part and the lower part of the symmetrically arranged contact spring system are connected through high-temperature-resistant cables to form conversion contacts of two groups of conversion circuits, the connecting line of two contacts of each reed group with the contact point is perpendicular to the longitudinal axis of the combined button, and the distance between the two contacts is smaller than the length of the conducting strip on the combined button.

Further, a cylindrical shell is further arranged, an output socket which is connected with the shell in a sealing way and is high in height resistance is arranged on the shell, a base of the lock control component is fixedly packaged with the upper end of the shell, the switch component, the spring seat and the electric temperature resistant cable thereof are all arranged in the cylindrical shell, a connecting wire with a contact point reed group is connected with a corresponding identification point of the output socket, a sealing bottom cover is arranged at the lower end of the shell and is fixedly connected with the sealing bottom cover, and the output socket is a high temperature resistant aviation socket which is connected with a 6-contact locking mechanism.

Furthermore, the combined button, the reed group with the contact point, the connecting cable and the socket are all made of insulating materials with the working temperature of 600-700 ℃ and can maintain normal working for at least 60 minutes, wherein the reed with the contact point and the spring can all work normally at the temperature of 700 ℃.

The upper end of the combined button is inserted into the circular hole of the bracket and is in sliding fit with the bracket hole, the upper end of the combined button is provided with a lock hole, and the lower end of the combined button is provided with a blind hole.

8 pairs of reed with contact point are arranged in the reed group with contact point, and all reeds are connected with each other; the contact in the reed is an arch structure and is fastened on the reed by utilizing a cold heading extrusion technology.

The contact end face of the reed group with the contact point is a contact, the Vickers hardness of the reed after heat treatment reaches 780, and the reed is ensured not to deform under the condition of 700 ℃. The contact pressure of the single reed and the conductive sheet is at least 2 newtons. The contact group is made of alloy material, and the surface is plated with gold.

When the unlocking mechanism is not inserted into the contact spring system, one or a plurality of pairs of contacts are in pressure connection with the conducting strips of the combination button to form a normally closed contact group, and the other contacts are in contact with the insulating part on the surface of the combination button or are positioned outside the lower end of the combination button to form a normally open contact group; the number of normally-closed contact groups on the contact spring system is consistent with that of the conductive sheets on the surface of the combined button, and the same normally-open contact group is positioned at the lower end of the normally-closed contact group; the distance between the normally open contact group and the lower end of the corresponding conductive sheet and the distance between the normally closed contact group and the upper end of the conductive sheet are smaller than the distance between the lower end of the combined button and the bottom plate of the spring guide post, and the distance between the nearest contacts of the two contact groups is equal to the distance between the adjacent conductive sheets.

The ceramic spring seat is provided with square grooves for placing the reed group with the contact, and each square groove is respectively provided with four rectangular windows with the thickness of 3.4mm multiplied by 4mm for extending the contact, so that the sufficient deflection and contact pressure of the reed are ensured; the ceramic spring seat cover is of a hollow structure with a window, and the left side and the right side of the spring seat cover are respectively provided with a protruding rectangular column, and the rectangular columns are sunk in the spring seat grooves during assembly and are used for compressing the spring leaves.

The sum of the locking length of the unlocking mechanism and the heights of the two conical tables is equal to the distance between the right end of the combined button and the spring guide post.

The utility model has the advantages that:

1. the unique layout of the lock control components can ensure the stability of the lock control; 2. the capability of resisting the high temperature of the environment reaches 700 ℃ for 60 minutes; 3. the umbrella-shaped lock cover enables the acting direction of the working acting force to realize 0-90-degree inclined-pulling unlocking, so that normal axial unlocking, locking and locking control of the switch can be realized; 4. the ceramic component adopts an integrated structural design and is welded into a whole through brazing; 5. the contact and the conductor sliding line contact is realized by adopting the combination of the contact and the reed, the contact performance is reliable, and the stroke control is accurate; 6. the spring guide post is arranged at the bottom of the lower end of the combined button, so that the switch is prevented from being over-pressed.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the cable-stayed unlocking switch with high temperature resistance at 700 ℃ for 60 minutes;

FIG. 2 is a schematic diagram of an embodiment of the cable-stayed unlocking switch with high temperature resistance at 700 ℃ for 60 minutes;

FIG. 3 is a schematic diagram showing the structure of an unlocking mechanism of an embodiment of the cable-stayed unlocking switch with the high temperature resistance of 700 ℃ for 60 minutes

Fig. 4 is a schematic diagram of a lock control component of an embodiment of the cable-stayed unlocking switch with high temperature resistance at 700 ℃ for 60 minutes;

fig. 5 and 6 are schematic diagrams of switch components of the embodiment of the cable-stayed unlocking switch with high temperature resistance at 700 ℃ for 60 minutes;

FIG. 7 is a schematic diagram of the structure of a housing part of an embodiment of the cable-stayed unlocking switch with high temperature resistance at 700 ℃ for 60 minutes;

FIG. 8 is a schematic view of the combination button of FIG. 5;

fig. 9 is a schematic diagram of the reed set with the contact point in fig. 5;

FIG. 10 is a schematic view of the spring seat of FIG. 5;

FIG. 11 is a schematic view of the spring seat cover of FIG. 5;

fig. 12 is a schematic view of the reed structure with a contact point in fig. 9.

In the figure: 1. the unlocking mechanism 1-1, the lock cover 1-2, the pin 1-3, the sealing cover 1-4, the connecting ring 1-5, the lock catch 2, the lock control component 2-1, the base 2-2, the elastic mechanism 3, the switch component 3-1, the combination button (3-1-1 button 3-1-3 ceramic insulator 3-1-3 conductor) 3-2 support 3-3 spring seat cover 3-4 spring seat 3-5 strip contact spring group (3-5-1, the wiring piece 3-5-2 strip contact spring group 3-5-2-1, the spring 3-5-2-2 contact) 3-6 spring guide post 3-8 cable 4, and the shell component (4-1 shell 4-2 socket base) 5 socket.

Detailed Description

The cable-stayed unlocking and separating travel switch of the utility model is further described below with reference to the drawings and the embodiments, but the utility model is not limited by the description.

Examples

As shown in figures 1 and 2, the high-temperature resistant 700 ℃ 60-minute diagonal unlocking and separating travel switch is formed by an unlocking mechanism 1, a lock control part 2, a switch assembly 3, a shell part 4, a combination button 3-1, a reed group with a contact point 3-5 and a bracket 3-2, wherein the reed group with the contact point 3-5 is connected with a socket 5 through a wire.

As shown in fig. 2, 5 and 6, a combined button hole is formed in the center of a bracket 3-2 with a door-shaped section, a combined button 3-1 is positioned in a door-shaped frame of the bracket 3-2, the upper end of the combined button is inserted into the combined button hole of the bracket 3-2, the combined button 3-1 is in clearance fit with the bracket 3-2, and the upper end of the combined button 3-1 is in movable fit with the combined button hole of the bracket 3-2. As shown in FIG. 8, the main button of the combined button 3-1 is a cylinder, a round hole at the upper end of the button 3-1 is a lock hole, a spring 3-6 is arranged in a blind hole at the lower end of the button 3-1, the lower end of the spring 3-6 is sleeved on a spring guide post 3-7, and the other end of the spring 3-6 is propped against the bottom of the blind hole at the lower end of the button 3-1. The diameter of the spring guide post 3-7 is smaller than the inner diameter of the spring 3-6, the bottom plate of the spring guide post 3-7 is fixed at the bottom end of the door-shaped frame of the bracket 3-2, and the protruding spring guide post 3-7 is inserted into the spring 3-6. The button 3-1 is fixedly provided with a ceramic insulator 3-1-2 in a sintering and welding mode, and the length of the button 3-1 extending out of the insulating sleeve is smaller than the distance between the upper side surface of the base 2-1 of the lock control part 2 and the abutted elastic mechanism 2-2. An insulator 3-1-2 on the combined button 3-1 is embedded with a conductor 3-1-3 insulated from the button 3-1, the insulator 3-1-1 and the conductor 3-1-3 are symmetrically distributed on the combined button 3-1, and the conductor 3-1-3 and the ceramic insulator 3-1-2 are formed into a whole in a welding mode. The conductor 3-1-3 is flush with the surface of the insulator 3-1-2 where it is located, and the conductor 3-1-3 is perpendicular to the longitudinal axis of the combination button 3-1.

As shown in FIG. 5, four reed groups 3-5 with contact points are installed in four square holes on one side of each spring seat 3-4 of the bracket 3-2, and the reed groups 3-5 with contact points are pressed and fixed through the spring seat cover 3-3. The contact springs are V-shaped spring pieces, the contact ends of the V-shaped contact springs are riveted with the contacts 3-5-2-2, and the contacts 3-5-2-2 change the conventional V-shaped point contact into line contact, so that the contact reliability is improved. The contact 3-5-2-2 is in contact with the electrical conductor 3-1-3 to facilitate sliding up and down on the ceramic insulator 3-1-2 or electrical conductor 3-1-3 of the combination button 3-1. The reed material adopts a high-temperature resistant alloy strip and is subjected to heat treatment, the Vickers hardness of the reed material reaches 420-700, and the reed material is ensured not to deform under the condition of 700 ℃. The contact pressure of the single reed 3-5-2-1 and the electric conductor 3-1-3 reaches 2.5 newtons.

2 identical contact spring systems, including spring seat 3-4, spring group 3-5 with contact point, spring seat cover 3-3, fixed on the side of support 3-2, one side equipped with spring 3-5-2-1 is pressed on the surface of combined button 3-1 ceramic insulator 3-1-2 in support 3-2, the connection line of 2 contacts 3-5-2-2 of every pair of contact spring systems is perpendicular to longitudinal axis of combined button 3-1, the distance between two contacts 3-5-2-2 is less than the length of conductor 3-1-3 on combined button 3-1. A pair of reeds 3-5-2-1 at the upper part of the spring seat 3-4 are in pressure connection with a conductor 3-1-3 on the combined button 3-1 to form a normally closed contact pair, and a pair of contact springs at the lower side are arranged outside the ceramic insulator 3-1-2 of the combined button 3-1 to form a normally open contact group. In this example, the left and right spring seats 3-4 are respectively provided with a pair of normally closed contact groups, and the left and right surfaces of the ceramic insulator 3-1-2 of the combination button 3-1 are respectively provided with a conductor 3-1-3. The distance between the normally open contact group and the upper end of the electric conductor 3-1-3 and the distance between the normally closed contact group and the lower end of the electric conductor 3-1-3 are smaller than the distance between the lower end of the combination button 3-1 and the bottom plate of the spring guide post 3-7.

The structure of the lock control component 2 is shown in fig. 4, and comprises 4 elastic mechanisms 2-2 and a base 2-1, wherein the elastic mechanisms 2-2 are arranged in the base 2-1, and the bracket 3-2 is fixedly connected to the bottom of the base 2-1. The elastic mechanisms 2-2 are positioned on the same plane perpendicular to the longitudinal axis of the combination button 3-1 and are radially arranged with the longitudinal axis of the combination button 3-1 as the center, and the front end of each elastic mechanism 2-2 facing the center is propped against the front of the lock hole at the upper end of the combination button 3-1. The center of the upper part of the base 2-1 is provided with an unlocking hole matched with the lock catch 1-5 of the unlocking mechanism 1, and the unlocking hole is opposite to the locking hole of the upper part of the combined button 3-1. In order to facilitate the insertion of the unlocking mechanism 1, the unlocking hole of the lock control part 2 is a conical hole with large outside and small inside. In addition, the front end of each elastic mechanism 2-2 is provided with a rigid ball which is convenient for sliding on the conical surface of the lock catch 1-5.

As shown in fig. 3 and 5, when the unlocking mechanism 1 is not inserted, the spring 3-6 presses the combination button 3-1 to the lock control member 2, the upper portion of the button 3-1 abuts against the front end of the elastic mechanism 2-2 abutted against the lock control member 2, and the upper end of the ceramic insulator 3-1 of the combination button 3-1 abuts against the lower end face of the bracket 3-2. The distance between the other end of the button 3-1 and the bottom plate of the spring guide post 3-7 is the stroke of the combined button 3-1 when the lock is locked. The two contacts 3-5-2-2 of the normally closed contact spring pair at the upper part of the contact spring system are pressed on the conductor 3-1-3 on the combined button 3-1, and the two contacts 3-5-2-2 are connected; the two contacts 3-5-2-2 of the normally open contact group are positioned outside the lower end of the ceramic insulator 3-1-2 of the combination button 3-1, and a circuit break is arranged between the two contacts 3-5-2-2.

As shown in fig. 1, 2 and 7, the switch is also provided with a cylindrical shell component 4, the inner diameter of the shell 4-1 is 1-2 times of the diameter of the bracket 3-2 for facilitating heat dissipation, and the shell 4-1 is provided with an output socket in closed connection with the shell, and the output socket is a multi-contact aviation socket with bayonet connection and can bear the high temperature of 700 ℃. The shell 4-1 is sleeved outside the switch assembly 3 and the reed group 3-5 with the contact point, and the connecting wire of the reed group 3-5 with the contact point is pressed and connected with the corresponding contact pin on the output socket. The base 2-1 of the lock control member 2 closes the lower end of the housing group 4 and is fixedly connected therewith, and the bottom cover closes the lower end of the housing group 4 and is fixedly connected therewith.

As shown in fig. 3, the unlocking mechanism 1 includes a lock cover 1-1, a pin 1-2, a seal cover 1-3, a connecting ring 1-4, and a lock catch 1-5. The lock cover 1-1 is connected with the lock catch 1-5 through the pin 1-2, the lock catch 1-5 is connected with the cone bottom, and the center is a guide post. The central line is two truncated cones of a straight line, the cone angle of the former truncated cone is 60 degrees, the cone angle of the truncated cone close to the lock cover 3-1 is 116 degrees, and the two conical surfaces are smoothly transited through a curved surface. The axial length of the lock catch 1-5 is equal to the distance between the lower end of the combination button 3-1 and the bottom plate of the spring guide post 3-7. The center of the top surface of the previous cone frustum is fixedly connected with a guide post matched with a lock hole of the combined button 3-1, the center of the top surface of the cone frustum close to the lock cover 1-1 is fixedly connected with the lock cover 1-1 through a connecting ring 1-4, the diameter of the cylinder is slightly smaller than the diameter of the top surface of the cone frustum connected with the lock catch guide post, and the length of the cylinder is equal to or longer than the distance between the upper end of the combined button 3-1 and the upper side surface of the base 2-1 when the unlocking mechanism 1 is not inserted. The umbrella-shaped lock cover 1-1 is a cone with a cone angle of 90 degrees, the central line of the lock cover 1-1 and the central line of the lock catch 1-5 are in a straight line, and the conical bottom surface of the lock cover 1-1 is fixedly connected with the connecting ring 1-4 connected with the lock catch 1-5.

When the lock is locked, the unlocking mechanism 1 is forced to be pressed into the lock control component 2, the front cone of the lock catch 1-5 pushes away one end of the abutted elastic mechanism 2-2 towards the center, the rigid ball at the front end of the elastic mechanism 2-2 slides along the conical surface of the lock catch 1-5, the elastic mechanism 2-2 is pressed and contracted by the lock catch 1-5, when the rear conical surface of the lock catch 1-5 reaches the front end of the elastic mechanism 2-2, the elastic mechanism 2-2 stretches out again, the rigid ball at the front end of the elastic mechanism is clamped between the lock catch 1-5 and the cylinder, at the moment, the guide column is inserted into the lock hole of the combination button 3-1, the lock catch 1-5 pushes the combination button to slide downwards until the lower end of the combination button 3-1 abuts against the bottom plate of the spring guide column 3-7, and the lock catch 1-5 is positioned between the elastic mechanism 2-2 and the combination button 3-1. The electric conductor 3-1-3 on the combination button 3-1 moves downwards to the normally open contact group, the normally closed contact group is opened, and the normally open contact group is closed, so that the switch is completed. When the lock is unlocked, the lock cover 1-1 is pulled outwards by force, and the rigid ball at the front end of the elastic mechanism 2-2 slides along the conical surface of the lock catch 1-5, so that the unlocking mechanism 1 can be pulled out. The spring 3-6 will press the combination button 3-1 to move upwards to return to the locked state, and the normally closed contact group is closed and the normally open contact group is opened.

Claims

1. The utility model provides a high temperature resistant draws unblock separation travel switch to one side, includes release mechanism, accuse lock part, switch module and socket, its characterized in that:

2. The cable-stayed unlocking separation travel switch according to claim 1, wherein: the high-temperature-resistant aviation socket is characterized by further comprising a cylindrical shell, wherein the shell is provided with an output socket which is connected with the shell in a sealing way and is high-temperature-resistant, a base of the lock control component is fixedly packaged with the upper end of the shell, the switch component, the spring seat and the electric temperature-resistant cable thereof are all arranged in the cylindrical shell, a connecting wire with a contact reed group is connected with a corresponding identification point of the output socket, the lower end of the shell is provided with a sealing bottom cover and is fixedly connected with the sealing bottom cover, and the output socket is a high-temperature-resistant aviation socket which is connected with a locking mechanism and is provided with 6 contacts.

3. The cable-stayed unlocking separation travel switch according to claim 1, wherein: the upper end of the combined button is inserted into the circular hole of the bracket and is in sliding fit with the bracket hole, the upper end of the combined button is provided with a lock hole, and the lower end of the combined button is provided with a blind hole.

4. The cable-stayed unlocking separation travel switch according to claim 1, wherein: 8 pairs of reed with contact point are arranged in the reed group with contact point, and all reeds are connected with each other; the contact in the reed is an arch structure and is fastened on the reed by utilizing a cold heading extrusion technology.

5. The cable-stayed unlocking separation travel switch according to claim 1, wherein: the contact end face of the reed group with the contact point is a contact, the Vickers hardness of the reed after heat treatment reaches 780, and the reed is ensured not to deform under the condition of 700 ℃; the contact pressure of the single reed and the conductive sheet is at least 2 newtons; the contact group is made of alloy material, and the surface is plated with gold.

6. The cable-stayed unlocking separation travel switch according to claim 1, wherein: when the unlocking mechanism is not inserted into the contact spring system, one or a plurality of pairs of contacts are in pressure connection with the conducting strips of the combination button to form a normally closed contact group, and the other contacts are in contact with the insulating part on the surface of the combination button or are positioned outside the lower end of the combination button to form a normally open contact group; the number of normally-closed contact groups on the contact spring system is consistent with that of the conductive sheets on the surface of the combined button, and the same normally-open contact group is positioned at the lower end of the normally-closed contact group; the distance between the normally open contact group and the lower end of the corresponding conductive sheet and the distance between the normally closed contact group and the upper end of the conductive sheet are smaller than the distance between the lower end of the combined button and the bottom plate of the spring guide post, and the distance between the nearest contacts of the two contact groups is equal to the distance between the adjacent conductive sheets.

7. The cable-stayed unlocking separation travel switch according to claim 1, wherein: the ceramic spring seat is provided with square grooves for placing the reed group with the contact, and each square groove is respectively provided with four rectangular windows with the thickness of 3.4mm multiplied by 4mm for extending the contact, so that the sufficient deflection and contact pressure of the reed are ensured; the ceramic spring seat cover is of a hollow structure with a window, and the left side and the right side of the spring seat cover are respectively provided with a protruding rectangular column, and the rectangular columns are sunk in the spring seat grooves during assembly and are used for compressing the spring leaves.

8. The cable-stayed unlocking separation travel switch according to claim 1, wherein: the sum of the locking length of the unlocking mechanism and the heights of the two conical tables is equal to the distance between the right end of the combined button and the spring guide post.

9. The cable-stayed unlocking separation travel switch according to claim 1, wherein: the combined button, the reed group with the contact point, the connecting cable and the socket are all made of insulating materials with the working temperature of 600-700 ℃ and can maintain normal working for at least 60 minutes, wherein the reed with the contact point and the spring can work normally at the temperature of 700 ℃.