Rotary potentiometer with push type bidirectional conduction switch

Abstract

The rotary potentiometer comprises a shaft, a shaft sleeve, a potentiometer assembly and a switch assembly, the switch assembly comprises a switch assembly shell, a switch control assembly, a first switch leading-out piece and a second switch leading-out piece, and the switch control assembly, the first switch leading-out piece and the second switch leading-out piece are arranged in the switch assembly shell. The switch control assembly comprises a moving block, swing blocks, a positioning tension spring, a reset pressure spring and a metal contact piece, a connecting column is arranged at the upper end of the moving block, the upper end of the connecting column is connected with the lower end of the shaft, the upper end of the reset pressure spring is connected with a pressure spring mounting column at the lower end of the moving block, and one ends of the two swing blocks are rotationally connected with the two opposite sides of the moving block respectively. Wherein one swing block is provided with a metal contact piece, and the metal contact piece is in close contact with the two second switch lead-out pieces. On-off control of the two circuits is achieved through the bidirectional conduction switch on the premise that the voltage / resistance adjusting function of the potentiometer is not affected, and specific application requirements are met.

Description

Technical Field

[0001] The invention belongs to the technical field of production of rotary potentiometers, and specifically relates to a rotary potentiometer with a switch, and in particular to a rotary potentiometer with a push-type bidirectional conduction switch. Background Art

[0002] Potentiometers are used to adjust voltage or resistance. Depending on the operation mode, they mainly include linear sliding potentiometers and rotary potentiometers. Among them, rotary potentiometers are potentiometers that achieve voltage or resistance adjustment functions by rotating the shaft and are widely used.

[0003] A rotary potentiometer with a switch is a rotary potentiometer that has both electrical switching function and voltage or resistance adjustment function. It is mainly used for switching power supply control and voltage / resistance adjustment in circuits or equipment. In order to facilitate operation, a rotary potentiometer with a switch generally adopts a push-type switch. This type of rotary potentiometer is generally called a rotary potentiometer with a push-type switch. Its basic structure includes a shaft, a sleeve, a potentiometer assembly and a switch assembly. The sleeve, the potentiometer assembly and the switch assembly are connected to each other. The shaft passes through the sleeve and the potentiometer assembly and is connected to the switch assembly to realize the voltage / resistance adjustment function and the switch function.

[0004] The traditional rotary potentiometer with a push switch has two working modes: working when the switch is off and working when the switch is on. In these two working modes, the potentiometer function, that is, the voltage or resistance adjustment function, is not affected. However, in some specific applications, this traditional rotary potentiometer with a push switch cannot meet the application requirements because it can only control the on and off of one switch circuit. For example, in the application, on the one hand, it is necessary to realize the normal voltage / resistance adjustment function when the second switch circuit is connected and the first switch circuit is disconnected, and on the other hand, it is necessary to be able to disconnect the second switch circuit when the first switch circuit is briefly connected. This situation can be used in the ignition operation of a fighter jet launching a weapon. The traditional method requires a separate control button, which will increase the space occupied by the electrical equipment, which is not conducive to meeting the miniaturization, lightweight and centralized requirements of the electrical equipment in the fighter jet.

[0005] In addition, the traditional rotary potentiometer with a push switch has a relatively fixed connection between the shaft, potentiometer assembly and switch assembly, which are prone to mutual interference and failure. The electrical and mechanical properties of the potentiometer assembly and switch assembly can only be tested after the entire product is assembled. The process quality control is difficult, the product qualification rate is low, the product reliability is low, and it is not suitable for equipment with high reliability requirements.

[0006] In addition, the traditional rotary potentiometer with a push switch has a small rotational torque and is not adjustable, and it is difficult to adapt to different mechanical vibration environments and the feel requirements of different users. Summary of the invention

[0007] The object of the present invention is to provide a rotary potentiometer with a push-type bidirectional conduction switch having two switch circuit control functions in order to solve the above problems.

[0008] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0009] A rotary potentiometer with a push-type two-way conduction switch, comprising a shaft, a bushing, a potentiometer assembly and a switch assembly, with the axial direction of the shaft being the vertical direction, the bushing, the potentiometer assembly and the switch assembly being connected to each other in sequence from top to bottom, the lower end of the shaft passing through the bushing and the potentiometer assembly in sequence and then being connected to the switch assembly, the switch assembly comprising a switch assembly housing and a switch control assembly, a first switch lead-out sheet, and a second switch lead-out sheet arranged in the switch assembly housing, the switch control assembly comprising a moving block, a swing block, a positioning tension spring, a reset compression spring and a metal contact sheet, an upwardly protruding connecting column is provided at the middle part of the upper end of the moving block, the upper end of the connecting column passes through the corresponding through hole of the switch assembly housing from bottom to top and then is connected to the lower end of the shaft, the shaft can rotate freely relative to the connecting column and cannot move vertically relative to the connecting column, the lower end of the moving block is provided with a compression spring mounting column, vertically The lower end of the return compression spring is placed in the compression spring groove at the bottom of the switch assembly housing, the upper end of the return compression spring is connected to the compression spring mounting column, one end of the two swing blocks is respectively rotatably connected to the laterally opposite sides of the moving block, the other end of one of the swing blocks is installed with the metal contact piece, the two ends of the horizontal positioning tension spring are respectively connected to the two swing blocks, the two first switch lead-out pieces and the two second switch lead-out pieces are respectively fixedly installed in the switch assembly housing, the two first switch lead-out pieces are located above the two second switch lead-out pieces and the metal contact piece is located between the first switch lead-out piece and the second switch lead-out piece, the metal contact piece is in close contact with the two second switch lead-out pieces and can be separated from the two second switch lead-out pieces and in close contact with the two first switch lead-out pieces after the moving block moves downward to drive the swing block to rotate.

[0010] Preferably, in order to facilitate the rotation and swinging function of the swing block, a spherical convex connecting portion is provided at one end of the swing block, and hemispherical rotation grooves are respectively provided on the two opposite lateral sides of the moving block, and the convex connecting portions of the two swing blocks are respectively placed in the two rotation grooves of the moving block.

[0011] Preferably, in order to keep the swing block in a more stable state after rotation, the two ends of the two transverse and mutually parallel positioning springs are respectively connected to the opposite sides of the two swing blocks, and the moving block is located between the two positioning springs.

[0012] Preferably, in order to facilitate connection with an external circuit, the outer ends of the two first switch lead-out pieces and the outer ends of the two second switch lead-out pieces respectively pass through corresponding through holes of the switch assembly housing and are placed outside the switch assembly housing.

[0013] Preferably, in order to facilitate the installation of metal contacts and realize a more stable and reliable on-off control conversion function between the two switch circuits, the metal contact piece is in the shape of a cylinder and its side wall is provided with an opening and is clamped on the corresponding swing block through the opening. A cylindrical metal matching piece is installed at the other end of the other swing block. The metal matching piece has the same material and thickness as the metal contact piece and has the same vertical height. A first matching metal piece corresponding to the two first switch lead-out pieces and a second matching metal piece corresponding to the two second switch lead-out pieces are provided in the switch assembly housing. The first matching metal piece and the two first switch lead-out pieces are respectively located on the opposite sides of the moving block in the horizontal direction and are at the same vertical height. The second matching metal piece and the two second switch lead-out pieces are respectively located on the opposite sides of the moving block in the horizontal direction and are at the same vertical height.

[0014] Preferably, in order to realize the function that the shaft and the connecting column can rotate relative to each other but cannot move axially relative to each other and facilitate quick connection, a section of the outer diameter of the shaft near the lower end is reduced to form a small diameter section, the middle circumferential outer wall of the small diameter section is provided with an annular groove, the upper section of the connecting column is provided with a vertical connecting column hole with an open upper end, the middle circumferential inner wall of the connecting column hole protrudes toward the center line direction of the connecting column hole to form an annular boss, the small diameter section is placed in the connecting column hole, the annular boss is placed in the annular groove, the part of the small diameter section located below the annular groove is placed in the positioning hole, the part of the small diameter section located below the annular groove is placed in the part of the connecting column hole located below the annular boss, and one side hole wall of the connecting column hole is provided with an opening groove for placing the small diameter section in the connecting column hole.

[0015] Preferably, in order to achieve a large and adjustable torque function to meet the requirements of different mechanical vibration environments and different user usage feel, the potentiometer assembly includes a potentiometer assembly housing, a rotating disk, a silicone ring, a collector ring, a reed sleeve, a reed, a brush and a resistor. A groove is provided on the end of the sleeve close to the potentiometer assembly and the silicone ring is installed in the groove. The top of the potentiometer assembly housing contacts the bottom of the sleeve. The rotating disk is placed in the potentiometer assembly housing and the top of the rotating disk contacts the bottom of the silicone ring. The middle and lower sections of the shaft pass through the central through hole of the silicone ring and the central through hole of the rotating disk. An axial plane is provided on one side of the surface of the middle and lower section of the shaft, and a plane is provided on one side of the wall surface of the central through hole of the rotating disk and the plane cooperates with the axial plane. The reed sleeve is placed in the potentiometer assembly housing and contacts the The bottom of the rotating disk is connected, the reed is installed on the reed sleeve, the reed includes an upper reed and a lower reed connected to each other, the upper reed contacts the conductive belt on the collector ring installed in the housing of the potentiometer assembly, and the conductive belt is connected to the inner end of the signal lead-out sheet, the outer end of the signal lead-out sheet passes through the corresponding through hole on the housing of the potentiometer assembly and is placed outside the housing of the potentiometer assembly, the brush is installed on the lower reed and contacts the working belt on the resistor installed in the housing of the potentiometer assembly, and the two ends of the working belt are respectively connected to the inner ends of two power lead-out sheets, the outer ends of the two power lead-out sheets pass through the corresponding through holes on the housing of the potentiometer assembly and are placed outside the housing of the potentiometer assembly, the lower section of the shaft passes through the central through hole of the reed sleeve, and the reed sleeve passes through the central through hole of the collector ring and the central through hole of the resistor.

[0016] Preferably, in order to improve the modular assembly function between the shaft, the potentiometer assembly and the switch assembly to reduce the problem of working interference between each other and facilitate the assembly after testing the performance separately, the switch assembly housing includes an upper switch cover plate, a middle switch cylinder and a lower switch base, the connecting column passes through the corresponding through hole on the switch cover plate, the compression spring groove is arranged in the middle of the upper part of the switch base, a cover plate limiting portion protruding downward is provided in the middle of the lower part of the switch cover plate, and the moving block is placed in the groove of the cover plate limiting portion and can move vertically in a limited manner, the first switch lead-out piece is installed on the cover plate limiting portion, the upper middle part of the switch base is provided with a base limiting portion protruding upward and the second switch lead-out piece is installed on the base limiting portion, and a plurality of vertical connecting rivets pass through a plurality of connecting through holes on the sleeve, a plurality of connecting through holes on the potentiometer assembly housing, a plurality of connecting through holes on the switch cover plate, a plurality of connecting through holes on the switch cylinder and a plurality of connecting through holes on the switch base in sequence to realize the connection between the sleeve, the potentiometer assembly and the switch assembly.

[0017] The beneficial effects of the present invention are:

[0018] The present invention designs a switch control component including a moving block, a swing block, a positioning tension spring, a reset compression spring and a metal contact piece, and cooperates with the first switch lead-out piece and the second switch lead-out piece. Under the premise of not affecting the voltage / resistance adjustment function of the potentiometer, the present invention realizes switch control of two circuits through a bidirectional conductive switch, and meets the specific application requirements of "both realizing the normal voltage / resistance adjustment function and disconnecting the first switch circuit when the second switch circuit is connected, and disconnecting the second switch circuit when the first switch circuit is briefly connected". It is particularly suitable for the ignition operation of a fighter jet launching a weapon, and is conducive to meeting the requirements of miniaturization, lightweight and centralization of electrical equipment in the fighter jet. In addition, the modular connection method is adopted between the shaft, potentiometer assembly and switch assembly of the present invention, which can better avoid working interference failure between each other. Each module can be assembled together after undergoing specific electrical and mechanical performance tests, which makes process quality control more convenient, and the product qualification rate and reliability are high, which is suitable for equipment with high reliability requirements. By adding a silicone ring that cooperates with the rotating disk, the rotational torque can be changed by changing the thickness of the silicone ring, so that the rotational torque of the potentiometer of the present invention is large and adjustable, which is conducive to adapting to different mechanical vibration environments and the use feel requirements of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the rotary potentiometer with a push-type bidirectional conduction switch according to the present invention;

[0020] Figure 2 The schematic diagram of the main cross-sectional structure of the rotary potentiometer with a push-type bidirectional conduction switch according to the present invention is shown in FIG. Figure 1 ;

[0021] Figure 3 is a three-dimensional diagram of the shaft and switch assembly of the rotary potentiometer with a push-type bidirectional conduction switch of the present invention before assembly;

[0022] Figure 4 It is a stereoscopic diagram of the shaft and switch assembly of the rotary potentiometer with a push-type bidirectional conduction switch of the present invention after being assembled;

[0023] Figure 5 This is one of the main structural schematic diagrams of the switch control assembly of the rotary potentiometer with a push-type bidirectional conduction switch according to the present invention, in which the reset compression spring is not shown;

[0024] Figure 6 is a left-side structural schematic diagram of a switch control assembly of a rotary potentiometer with a push-type bidirectional conduction switch according to the present invention, and Figure 5 Correspondingly, the return compression spring is not shown in the figure;

[0025] Figure 7 This is the second schematic diagram of the main structure of the switch control assembly of the rotary potentiometer with a push-type bidirectional conduction switch according to the present invention, and the reset spring is not shown in the figure. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings:

[0027] like Figure 1-Figure 7 As shown, the rotary potentiometer with a push-type bidirectional conduction switch of the present invention comprises a shaft 1, a sleeve 5, a potentiometer assembly (the specific structure refers to the following content) and a switch assembly. With the axial direction of the shaft 1 as the vertical direction, the sleeve 5, the potentiometer assembly and the switch assembly are connected to each other from top to bottom in sequence, and the lower end of the shaft 1 passes through the sleeve 5 and the potentiometer assembly in sequence and is connected to the switch assembly. The switch assembly comprises a switch assembly housing (refer to the switch cover 14, the switch cylinder 16 and the switch base 17 in the following content) and a switch control assembly, a first switch lead-out sheet 15 and a second switch lead-out sheet 18 arranged in the switch assembly housing. The switch control assembly comprises a moving block 29, a swing block 30, a positioning tension spring 31, a reset compression spring 33 and a metal contact sheet 32. A connecting column 28 protruding upward is provided in the middle of the upper end of the moving block 29. The upper end of the connecting column 28 passes through the corresponding through hole of the switch assembly housing from bottom to top and is connected to the lower end of the shaft 1. The shaft 1 can rotate freely relative to the connecting column 28 and cannot rotate relative to the connecting column 28. The connecting column 28 moves vertically, and a compression spring mounting column 38 is provided at the lower end of the moving block 29. The lower end of the vertical return compression spring 33 is placed in the compression spring groove at the bottom of the switch assembly housing, and the upper end of the return compression spring 33 is connected to the compression spring mounting column 38. One end of the two swing blocks 30 is respectively rotatably connected to the opposite sides of the moving block 29, and the other end of one of the swing blocks 30 is installed with a metal contact piece 32. The two ends of the horizontal positioning tension spring 31 are respectively connected to the two swing blocks 30. The two first switch lead-out pieces 15 and the two second switch lead-out pieces 18 are respectively fixedly installed in the switch assembly housing, the two first switch lead-out pieces 15 are located above the two second switch lead-out pieces 18 and the metal contact piece 32 is located between the first switch lead-out piece 15 and the second switch lead-out piece 18. The metal contact piece 32 is in close contact with the two second switch lead-out pieces 18 and can be separated from the two second switch lead-out pieces 18 and in close contact with the two first switch lead-out pieces 15 after the moving block 29 moves downward to drive the swing block 30 to rotate.

[0028] like Figure 1-Figure 7 As shown, the present invention also discloses the following more optimized specific structures:

[0029] In order to facilitate the rotation and swinging function of the swing block 30, a spherical convex connecting portion 37 is provided at one end of the swing block 30, and hemispherical rotation grooves are respectively provided on the opposite sides of the moving block 29, and the convex connecting portions 37 of the two swing blocks 30 are respectively placed in the two rotation grooves of the moving block 29.

[0030] In order to keep the swing block 30 in a more stable state after rotation, two ends of two transverse and mutually parallel positioning springs 31 are respectively connected to opposite sides of the two swing blocks 30 , and the moving block 29 is located between the two positioning springs 31 .

[0031] In order to facilitate connection with an external circuit, the outer ends of the two first switch lead-out pieces 15 and the outer ends of the two second switch lead-out pieces 18 respectively pass through corresponding through holes of the switch assembly housing and are placed outside the switch assembly housing.

[0032] In order to facilitate the installation of the metal contact 32 and realize a more stable and reliable on-off control conversion function between the two switch circuits, the metal contact piece 32 is in the shape of a cylinder and its side wall is provided with an opening and is clamped on the corresponding swing block 30 through the opening. A cylindrical metal matching piece (not marked in the figure) is installed at the other end of the other swing block 30. The metal matching piece and the metal contact piece 32 have the same material and thickness and the same vertical height. A first matching metal piece (not marked in the figure) corresponding to the two first switch lead-out pieces 15 and a second matching metal piece (not marked in the figure) corresponding to the two second switch lead-out pieces 18 are provided in the switch assembly housing. The first matching metal piece and the two first switch lead-out pieces 15 are respectively located on the opposite sides of the moving block 29 in the horizontal direction and are at the same vertical height. The second matching metal piece and the two second switch lead-out pieces 18 are respectively located on the opposite sides of the moving block 29 in the horizontal direction and are at the same vertical height.

[0033] In order to realize the function that the shaft 1 and the connecting column 28 can rotate relative to each other but cannot move axially relative to each other and facilitate quick connection, a section of the outer diameter near the lower end of the shaft 1 is reduced to form a small diameter section 25, and the middle circumferential outer wall of the small diameter section 25 is provided with an annular groove 26, and the upper section of the connecting column 28 is provided with a vertical connecting column hole 34 with an open upper end, and the middle circumferential inner wall of the connecting column hole 34 protrudes toward the center line direction of the connecting column hole 34 to form an annular boss 35, the small diameter section 25 is placed in the connecting column hole 34, and the annular boss 35 is placed in the annular groove 26, the part of the small diameter section 25 located below the annular groove 26 is placed in the part of the connecting column hole 34 located below the annular boss 35, and the part of the small diameter section 25 corresponding to the annular groove 26 is placed in the central through hole 39 of the annular boss 35, and a side hole wall of the connecting column hole 34 is provided with an opening groove 36 for placing the small diameter section 25 in the connecting column hole 34.

[0034] In order to achieve a large and adjustable torque to meet the requirements of different mechanical vibration environments and different user usage feel, the potentiometer assembly includes a potentiometer assembly housing 9, a rotating disk 21, a silicone ring 19, a collector ring 27, a reed sleeve 24, a reed 22, a brush 23 and a resistor 11. A groove is provided on the end of the sleeve 5 close to the potentiometer assembly and the silicone ring 19 is installed in the groove. The top of the potentiometer assembly housing 9 contacts the bottom of the sleeve 5. The rotating disk 21 is placed in the potentiometer assembly housing 9 and the top of the rotating disk 21 contacts the bottom of the silicone ring 19. The middle and lower sections of the shaft 1 pass through the central through hole of the silicone ring 19 and the central through hole of the rotating disk 21. An axial plane 20 is provided on one side of the surface of the middle and lower section of the shaft 1. A plane is provided on one side of the surface of the central through hole of the rotating disk 21 and the plane cooperates with the axial plane 20. The reed sleeve 24 is placed in the potentiometer assembly housing 9 and is in contact with the rotating disk 21. The following is connected, the reed 22 is installed on the reed sleeve 24, the reed 22 includes an upper reed (not marked in the figure) and a lower reed (not marked in the figure) connected to each other, the upper reed contacts the conductive belt on the collector ring 27 installed in the potentiometer assembly housing 9, and the conductive belt is connected to the inner end of the signal lead-out piece 10, the outer end of the signal lead-out piece 10 passes through the corresponding through hole on the potentiometer assembly housing 9 and is placed outside the potentiometer assembly housing 9, the brush 23 is installed on the lower reed and contacts the working belt on the resistor 11 installed in the potentiometer assembly housing 9, and the two ends of the working belt are respectively connected to the inner ends of the two power lead-out pieces 12, the outer ends of the two power lead-out pieces 12 pass through the corresponding through holes on the potentiometer assembly housing 9 and are placed outside the potentiometer assembly housing 9, the lower section of the shaft 1 passes through the central through hole of the reed sleeve 24, the reed sleeve 24 passes through the central through hole of the collector ring 27 and the central through hole of the resistor 11.

[0035] In order to improve the modular assembly function between the shaft 1, the potentiometer assembly and the switch assembly to reduce the problem of working interference between each other and facilitate the assembly after testing the performance separately, the switch assembly housing includes an upper switch cover plate 14, a middle switch cylinder 16 and a lower switch base 17, the connecting column 28 passes through the corresponding through hole on the switch cover plate 14, the compression spring groove is arranged in the middle of the upper part of the switch base 17, the lower middle part of the switch cover plate 14 is provided with a cover plate limit portion (not marked in the figure) protruding downward, and the moving block 29 is placed in the groove of the cover plate limit portion and can be vertically limited Move, the first switch lead-out piece 15 is installed on the cover plate limit portion, the upper middle part of the switch base 17 is provided with a base limit portion (not marked in the figure) protruding upward and the second switch lead-out piece 18 is installed on the base limit portion, and a plurality of vertical connecting rivets 16 sequentially pass through a plurality of connecting through holes on the sleeve 5, a plurality of connecting through holes on the potentiometer assembly housing 9, a plurality of connecting through holes on the switch cover 14, a plurality of connecting through holes on the switch cylinder 16 and a plurality of connecting through holes on the switch base 17 to realize the connection between the sleeve 5, the potentiometer assembly and the switch assembly.

[0036] Figure 1 and Figure 2 Also shown is a threaded section 2 arranged on the upper section of the sleeve 5 and a nut 3 sleeved on the threaded section 2, an inner serrated washer 4 is arranged between the nut 3 and the sleeve 5, a washer 8 and a positioning plate 7 are arranged between the potentiometer assembly housing 9 and the sleeve 5, and the resistor 11 is installed on the potentiometer assembly housing 9 through a fixing plate 13. These structures are all conventional adaptive structures.

[0037] like Figure 1-Figure 7 As shown, when used, the two first switch lead-out sheets 15 are connected to the first switch circuit to be controlled (not shown in the figure), the two second switch lead-out sheets 18 are connected to the second switch circuit to be controlled (not shown in the figure), the signal lead-out sheet 10 is connected to the controlled device (not shown in the figure), and the two power lead-out sheets 12 are connected to the power circuit (not shown in the figure); under normal working conditions, the shaft 1 will not be pressed. At this time, the rotating shaft 1 can drive the rotating disk 21, the reed sleeve 24, the reed 22 and the brush 23 to rotate synchronously. The brush 23 rotates in contact with the working belt of the resistor 11, and the changing voltage (resistance) signal is output through the conductive belt on the collector ring 27 and the signal lead-out sheet 10 to achieve the corresponding voltage / resistance adjustment function. At the same time, as Figure 2-Figure 6 As shown, the two second switch lead-out sheets 18 are connected through the metal contact sheet 32 ​​to realize the connection control of the second switch circuit, and the two first switch lead-out sheets 15 are disconnected to realize the disconnection control of the first switch circuit; when the first switch circuit needs to be connected, the shaft 1 is pressed down to drive the moving block 29 to move downward through the connecting column 28. Since the swing block 30 is blocked by the two second switch lead-out sheets 18 and the second matching metal sheet and cannot move downward and has a rebound effect, the swing block 30 will overcome the elastic force of the positioning tension spring 31 and rotate until the metal contact sheet 32 ​​contacts the two first switch lead-out sheets 15 and connects the two first switch lead-out sheets 15. Figure 7 , at this time, the first switch circuit is connected and the second switch circuit is disconnected, realizing the relevant function; then release the shaft 1, and under the elastic force of the reset compression spring 33, the moving block 29 and the shaft 1 move upward. Since the swing block 30 is blocked by the two first switch lead-out pieces 15 and the first matching metal piece and cannot move upward and has a rebound effect, the swing block 30 will overcome the elastic force of the positioning tension spring 31 and rotate until the metal contact piece 32 contacts and connects the two second switch lead-out pieces 18. At this time, the first switch circuit is disconnected and the second switch circuit is connected, realizing the reset function.

[0038] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A rotary potentiometer with a push-type bidirectional conduction switch, comprising a shaft, a sleeve, a potentiometer assembly and a switch assembly, wherein the shaft axis is vertical, the sleeve, the potentiometer assembly and the switch assembly are connected to each other from top to bottom in sequence, and the lower end of the shaft passes through the sleeve and the potentiometer assembly in sequence and is connected to the switch assembly, characterized in that: The switch assembly comprises a switch assembly housing and a switch control assembly, a first switch lead-out sheet, and a second switch lead-out sheet arranged in the switch assembly housing. The switch control assembly comprises a moving block, a swing block, a positioning tension spring, a reset compression spring, and a metal contact sheet. A connecting column protruding upward is provided in the middle of the upper end of the moving block. The upper end of the connecting column passes through the corresponding through hole of the switch assembly housing from bottom to top and is connected to the lower end of the shaft. The shaft can rotate freely relative to the connecting column and cannot move vertically relative to the connecting column. A compression spring mounting column is provided at the lower end of the moving block. The lower end of the vertical reset compression spring is placed in a compression spring groove at the bottom of the switch assembly housing. The upper end of the reset compression spring is connected to the compression spring mounting column. The two swing blocks are One end of the block is rotatably connected to the two opposite lateral sides of the moving block, the other end of one of the swing blocks is installed with the metal contact piece, the two ends of the lateral positioning tension spring are respectively connected to the two swing blocks, the two first switch lead-out pieces and the two second switch lead-out pieces are respectively fixedly installed in the switch assembly housing, the two first switch lead-out pieces are located above the two second switch lead-out pieces and the metal contact piece is located between the first switch lead-out piece and the second switch lead-out piece, the metal contact piece is in close contact with the two second switch lead-out pieces and can be separated from the two second switch lead-out pieces and in close contact with the two first switch lead-out pieces after the moving block moves downward to drive the swing block to rotate.

2. The rotary potentiometer with a push-type bidirectional conduction switch according to claim 1, characterized in that: One end of the swing block is provided with a spherical convex connection part, and the two opposite lateral sides of the moving block are respectively provided with hemispherical rotation grooves, and the convex connection parts of the two swing blocks are respectively placed in the two rotation grooves of the moving block.

3. The rotary potentiometer with a push-type bidirectional conduction switch according to claim 2, characterized in that: Two ends of the two transverse and mutually parallel positioning tension springs are respectively connected to opposite sides of the two swing blocks, and the moving block is located between the two positioning tension springs.

4. The rotary potentiometer with a push-type bidirectional conduction switch according to claim 1, characterized in that: The outer ends of the two first switch lead-out pieces and the outer ends of the two second switch lead-out pieces respectively pass through the corresponding through holes of the switch assembly housing and are placed outside the switch assembly housing.

5. The rotary potentiometer with a push-type bidirectional conduction switch according to claim 1, characterized in that: The metal contact piece is in the shape of a cylinder and has an opening on its side wall and is clamped on the corresponding swing block through the opening. A cylindrical metal matching piece is installed at the other end of the other swing block. The metal matching piece has the same material and thickness as the metal contact piece and has the same vertical height. A first matching metal piece corresponding to the two first switch lead-out pieces and a second matching metal piece corresponding to the two second switch lead-out pieces are provided in the switch assembly housing. The first matching metal piece and the two first switch lead-out pieces are respectively located on the opposite sides of the moving block in the horizontal direction and are at the same vertical height. The second matching metal piece and the two second switch lead-out pieces are respectively located on the opposite sides of the moving block in the horizontal direction and are at the same vertical height.

6. The rotary potentiometer with a push-type bidirectional conduction switch according to any one of claims 1 to 5, characterized in that: A section of the shaft near the lower end has an outer diameter that is reduced to form a small diameter section, a middle circumferential outer wall of the small diameter section is provided with an annular groove, the upper section of the connecting column is provided with a vertical connecting column hole with an open upper end, the middle circumferential inner wall of the connecting column hole protrudes toward the center line direction of the connecting column hole to form an annular boss, the small diameter section is placed in the connecting column hole, the annular boss is placed in the annular groove, a portion of the small diameter section located below the annular groove is placed in a portion of the connecting column hole located below the annular boss, a portion of the small diameter section corresponding to the annular groove is placed in the center through hole of the annular boss, and a side hole wall of the connecting column hole is provided with an open groove for placing the small diameter section in the connecting column hole.

7. The rotary potentiometer with a push-type bidirectional conduction switch according to any one of claims 1 to 5, characterized in that: The potentiometer assembly includes a potentiometer assembly housing, a rotating disk, a silicone ring, a collector ring, a reed sleeve, a reed, a brush and a resistor. A recess is provided on one end of the sleeve close to the potentiometer assembly and the silicone ring is installed in the recess. The upper surface of the potentiometer assembly housing contacts the lower surface of the sleeve. The rotating disk is placed in the potentiometer assembly housing and the upper surface of the rotating disk contacts the lower surface of the silicone ring. The middle and lower sections of the shaft pass through the central through hole of the silicone ring and the central through hole of the rotating disk. An axial plane is provided on one side of the surface of the middle and lower section of the shaft. A plane is provided on one side of the wall surface of the central through hole of the rotating disk and the plane cooperates with the axial plane. The reed sleeve is placed in the potentiometer assembly housing and connected to the lower surface of the rotating disk. The reed is installed on the reed sleeve The reed comprises an upper reed and a lower reed which are connected to each other. The upper reed contacts a conductive belt on the collector ring installed in the housing of the potentiometer assembly and the conductive belt is connected to the inner end of a signal lead-out sheet. The outer end of the signal lead-out sheet passes through a corresponding through hole on the housing of the potentiometer assembly and is placed outside the housing of the potentiometer assembly. The brush is installed on the lower reed and contacts a working belt on the resistor installed in the housing of the potentiometer assembly and the two ends of the working belt are respectively connected to the inner ends of two power lead-out sheets. The outer ends of the two power lead-out sheets pass through corresponding through holes on the housing of the potentiometer assembly and are placed outside the housing of the potentiometer assembly. The lower section of the shaft passes through the central through hole of the reed sleeve, and the reed sleeve passes through the central through hole of the collector ring and the central through hole of the resistor.

8. The rotary potentiometer with a push-type bidirectional conduction switch according to claim 7, characterized in that: The switch assembly housing includes an upper switch cover, a middle switch cylinder and a lower switch base, the connecting column passes through the corresponding through hole on the switch cover, the compression spring groove is arranged in the middle of the upper part of the switch base, a downwardly protruding cover limit portion is provided in the middle of the lower part of the switch cover, and the moving block is placed in the groove of the cover limit portion and can move vertically with limited movement, the first switch lead-out piece is installed on the cover limit portion, an upwardly protruding base limit portion is provided in the middle of the upper part of the switch base, and the second switch lead-out piece is installed on the base limit portion, and a plurality of vertical connecting rivets sequentially pass through a plurality of connecting through holes on the shaft sleeve, a plurality of connecting through holes on the potentiometer assembly housing, a plurality of connecting through holes on the switch cover, a plurality of connecting through holes on the switch cylinder and a plurality of connecting through holes on the switch base to realize the connection between the shaft sleeve, the potentiometer assembly and the switch assembly.

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