Contactor moving terminal assembly and contactor

Abstract

The invention discloses a contactor moving terminal assembly and a contactor. The contactor moving terminal assembly comprises: a moving terminal; the driving shaft is movably connected with the movable terminal and is used for driving the movable terminal to move from the open position to the closed position; the main elastic piece is axially compressed between the bottom of the movable terminal and the driving shaft and is used for providing main contact pressure for the movable terminal; and an auxiliary elastic member disposed between the moving terminal and the driving shaft. When the movable terminal is in the closed position, the auxiliary elastic piece is axially compressed between the bottom of the movable terminal and the driving shaft and is used for providing auxiliary contact pressure for the movable terminal; and when the movable terminal is in the disconnection position, the auxiliary elastic piece is not axially compressed. According to the invention, the main elastic member and the auxiliary elastic member apply the contact pressure to the moving terminal at the same time, so that the contact resistance between the moving terminal and the static terminal is reduced, the short-circuit current resistance of the contactor is improved, and the auxiliary elastic member does not affect the normal pull-in of the contactor.

Description

Technical Field

[0001] The invention relates to a contactor moving terminal assembly and a contactor comprising the contactor moving terminal assembly. Background Art

[0002] The ability to withstand short-circuit current is an important performance indicator of DC contactors. When short-circuit current flows through the moving and static terminals of the contactor, an electric repulsion force will be generated between the moving and static terminals. If the contact pressure between the closed moving and static terminals is not enough to resist this electric repulsion force, the moving and static terminals will separate and generate a strong arc, which may eventually cause a safety accident.

[0003] In terms of increasing the short-circuit current resistance, some manufacturers use the characteristics of the magnetic field generated around the moving terminal of the contactor when the short-circuit current passes through it, and add ferromagnetic parts around the moving terminal. The electromagnetic attraction generated by the ferromagnetic parts is opposite to the electromotive force generated by the short-circuit current on the moving terminal, offsetting part of the electromotive force to improve the short-circuit current resistance of the contactor. However, the existing short-circuit current resistance scheme has the problems of complex structure, difficult installation and high cost. Summary of the invention

[0004] The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and defects in the prior art.

[0005] According to one aspect of the present invention, a contactor moving terminal assembly is provided. The contactor moving terminal assembly includes: a moving terminal; a drive shaft, movably connected to the moving terminal, used to drive the moving terminal to move from a disconnected position electrically separated from a static terminal to a closed position electrically contacted with the static terminal; a main elastic member, axially compressed between the bottom of the moving terminal and the drive shaft, used to provide a main contact pressure to the moving terminal; and an auxiliary elastic member, arranged between the moving terminal and the drive shaft. When the moving terminal is in the closed position, the auxiliary elastic member is axially compressed between the bottom of the moving terminal and the drive shaft, used to provide an auxiliary contact pressure to the moving terminal; when the moving terminal is in the disconnected position, the auxiliary elastic member is not axially compressed.

[0006] According to an exemplary embodiment of the present invention, a radially protruding flange portion is formed on the drive shaft, the auxiliary elastic member is axially supported on the flange portion, and the main elastic member is axially compressed between the bottom of the movable terminal and the flange portion of the drive shaft.

[0007] According to another exemplary embodiment of the present invention, the auxiliary elastic member includes: a main body; and a cantilever portion connected to the main body. The main body is axially supported on the flange portion, and both ends of the main elastic member abut against the main body and the movable terminal respectively. When the movable terminal is in the closed position, the end of the cantilever portion abuts against the bottom of the movable terminal.

[0008] According to another exemplary embodiment of the present invention, the main body portion includes a bottom wall and a side wall connected to the bottom wall, the cantilever portion is connected to the upper edge of the side wall and extends obliquely relative to the side wall; the bottom wall of the main body portion abuts against the flange portion of the drive shaft, and the lower end of the main elastic member abuts against the bottom wall of the main body portion.

[0009] According to another exemplary embodiment of the present invention, the upper end of the driving shaft can movably pass through the moving terminal, and a limiting member is installed on the upper end of the driving shaft; when the moving terminal is in the disconnected position, the limiting member axially abuts against the top of the moving terminal to limit the position of the moving terminal; when the moving terminal is in the closed position, the limiting member is separated from the moving terminal by a predetermined distance.

[0010] According to another exemplary embodiment of the present invention, a retaining groove is formed on the outer circumferential surface of the upper end of the driving shaft, and the limiting member is a retaining ring, which is retained in the retaining groove of the driving shaft.

[0011] According to another exemplary embodiment of the present invention, the contactor moving terminal assembly further comprises: an insulator, the upper end of the drive shaft is fixed to the insulator. The main elastic member is axially compressed between the moving terminal and the insulator, and the auxiliary elastic member is axially supported on the insulator; when the moving terminal is in the closed position, the auxiliary elastic member is axially compressed between the moving terminal and the insulator.

[0012] According to another exemplary embodiment of the present invention, the auxiliary elastic member includes: a main body; and a cantilever portion connected to the main body, the main body is axially supported on the insulator, and both ends of the main elastic member abut against the movable terminal and the insulator respectively. When the movable terminal is in the closed position, the end of the cantilever portion abuts against the bottom of the movable terminal.

[0013] According to another exemplary embodiment of the present invention, the main body includes a bottom wall supported on the top surface of the insulator and a side wall connected to the bottom wall, and the cantilever portion is connected to an upper edge of the side wall and extends obliquely relative to the side wall.

[0014] According to another exemplary embodiment of the present invention, an opening allowing the main elastic member to pass through is formed on the bottom wall of the main body, and a groove for accommodating the main elastic member is formed on the top of the insulator; the main elastic member passes through the bottom wall of the main body, and the lower end of the main elastic member is supported on the bottom surface of the groove of the insulator.

[0015] According to another exemplary embodiment of the present invention, the main elastic member and the auxiliary elastic member are respectively coil springs, and the auxiliary elastic member is arranged inside the main elastic member; a groove for accommodating the main elastic member and the auxiliary elastic member is formed on the top of the insulator, and the lower ends of the main elastic member and the auxiliary elastic member are supported on the bottom surface of the groove of the insulator.

[0016] According to another exemplary embodiment of the present invention, the contactor moving terminal assembly further includes a stopper, the stopper including: a top plate; and a pair of side plates connected to the top plate. The lower portion of the pair of side plates of the stopper is fixed to the insulator, and the moving terminal and the auxiliary elastic member are accommodated in the stopper. When the moving terminal is in the disconnected position, the top plate of the stopper axially abuts against the top of the moving terminal to limit the position of the moving terminal; when the moving terminal is in the closed position, the top plate of the stopper is separated from the moving terminal by a predetermined distance.

[0017] According to another exemplary embodiment of the present invention, the insulator is an injection-molded part that is directly molded on the drive shaft and the limiter through an insert injection molding process, so that the drive shaft, the limiter and the insulator are formed as an integral component.

[0018] According to another aspect of the present invention, a contactor moving terminal assembly is provided. The contactor moving terminal assembly includes: a moving terminal; a drive shaft, movably connected to the moving terminal, used to drive the moving terminal to move from a disconnected position electrically separated from the static terminal to a closed position electrically contacted with the static terminal; a main elastic member, axially compressed between the moving terminal and the drive shaft, used to provide a main contact pressure to the moving terminal; and an auxiliary elastic member, held between the bottom of the moving terminal and the top of the main elastic member. When the moving terminal is in the closed position, the auxiliary elastic member is axially compressed between the bottom of the moving terminal and the drive shaft, used to provide an auxiliary contact pressure to the moving terminal.

[0019] According to an exemplary embodiment of the present invention, a shoulder is formed on the driving shaft, and the shoulder is suitable for abutting against the bottom of the auxiliary elastic member; when the movable terminal is in the closed position, the auxiliary elastic member is axially compressed between the bottom of the movable terminal and the shoulder of the driving shaft; when the movable terminal is in the disconnected position, the auxiliary elastic member does not contact the shoulder of the driving shaft and is axially spaced apart by a predetermined distance.

[0020] According to another exemplary embodiment of the present invention, the main elastic member is a coil spring, the auxiliary elastic member is a disc spring, the auxiliary elastic member has a bottom opening and a top opening, and the diameter of the top opening is larger than the bottom opening; the edge of the top opening of the auxiliary elastic member abuts against the bottom surface of the movable terminal, and the bottom of the auxiliary elastic member abuts against the top of the main elastic member.

[0021] According to another exemplary embodiment of the present invention, a radially protruding flange portion is formed on the driving shaft, and the main elastic member is axially compressed between the auxiliary elastic member or the bottom of the movable terminal and the flange portion of the driving shaft.

[0022] According to another exemplary embodiment of the present invention, the contactor moving terminal assembly also includes: a washer, which is supported on the flange portion of the drive shaft and has a diameter larger than the flange portion, and the upper and lower ends of the main elastic member respectively abut against the bottom of the auxiliary elastic member and the top surface of the washer.

[0023] According to another exemplary embodiment of the present invention, the upper end of the driving shaft can movably pass through the moving terminal, and a limiting member is installed on the upper end of the driving shaft; when the moving terminal is in the disconnected position, the limiting member axially abuts against the top of the moving terminal to limit the position of the moving terminal; when the moving terminal is in the closed position, the limiting member is separated from the moving terminal by a predetermined distance.

[0024] According to another exemplary embodiment of the present invention, a retaining groove is formed on the outer circumferential surface of the upper end of the driving shaft, and the limiting member is a retaining ring, which is retained in the retaining groove of the driving shaft.

[0025] According to another exemplary embodiment of the present invention, the elastic coefficient of the auxiliary elastic member is greater than that of the main elastic member, so that under the same axial pressure, the axial compression amount of the auxiliary elastic member is smaller than that of the main elastic member.

[0026] According to another aspect of the present invention, a contactor is provided. The contactor comprises: a housing; a static terminal fixed to the housing; a coil installed in the housing; and the aforementioned contactor moving terminal assembly movably arranged in the housing. When the coil is energized, the driving shaft drives the moving terminal to move from the open position to the closed position under the action of the electromagnetic force generated by the coil.

[0027] In the aforementioned exemplary embodiments according to the present invention, when the moving terminal is in a closed position in electrical contact with the static terminal, the main elastic member and the auxiliary elastic member simultaneously apply contact pressure to the moving terminal, thereby reducing the contact resistance between the moving terminal and the static terminal, improving the short-circuit current resistance of the contactor, and the auxiliary elastic member will not affect the normal attraction of the contactor.

[0028] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional schematic diagram showing a contactor moving terminal assembly according to a first embodiment of the present invention;

[0030] Figure 2 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a first embodiment of the present invention, wherein the movable terminal is in a disconnected position electrically separated from the static terminal;

[0031] Figure 3 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a first embodiment of the present invention, wherein the movable terminal is in a closed position in electrical contact with the stationary terminal;

[0032] Figure 4 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a second embodiment of the present invention, wherein the movable terminal is in a disconnected position electrically separated from the static terminal;

[0033] Figure 5 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a second embodiment of the present invention, wherein the movable terminal is in a closed position in electrical contact with the stationary terminal;

[0034] Figure 6 A three-dimensional schematic diagram showing an auxiliary elastic member of a contactor movable terminal assembly according to a second embodiment of the present invention;

[0035] Figure 7 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a third embodiment of the present invention, wherein the movable terminal is in a disconnected position electrically separated from the static terminal;

[0036] Figure 8An axial cross-sectional view showing a movable terminal assembly of a contactor according to a third embodiment of the present invention, wherein the movable terminal is in a closed position in electrical contact with the stationary terminal;

[0037] Fig. 9 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a fourth embodiment of the present invention, wherein the movable terminal is in a disconnected position electrically separated from the static terminal;

[0038] Fig.10 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a fourth embodiment of the present invention, wherein the movable terminal is in a closed position in electrical contact with the stationary terminal;

[0039] Fig.11 A perspective schematic diagram showing an auxiliary elastic member of a movable terminal assembly of a contactor according to a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further specifically described below by examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0041] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0042] According to an overall technical concept of the present invention, a contactor moving terminal assembly is provided. The contactor moving terminal assembly includes: a moving terminal; a drive shaft, movably connected to the moving terminal, used to drive the moving terminal to move from a disconnected position electrically separated from the static terminal to a closed position electrically contacted with the static terminal; a main elastic member, axially compressed between the bottom of the moving terminal and the drive shaft, used to provide the main contact pressure to the moving terminal; and an auxiliary elastic member, arranged between the moving terminal and the drive shaft. When the moving terminal is in the closed position, the auxiliary elastic member is axially compressed between the bottom of the moving terminal and the drive shaft, used to provide the auxiliary contact pressure to the moving terminal; when the moving terminal is in the disconnected position, the auxiliary elastic member is not axially compressed.

[0043] According to another general technical concept of the present invention, a contactor moving terminal assembly is provided. The contactor moving terminal assembly includes: a moving terminal; a drive shaft, movably connected to the moving terminal, used to drive the moving terminal to move from a disconnected position electrically separated from the static terminal to a closed position electrically contacted with the static terminal; a main elastic member, axially compressed between the moving terminal and the drive shaft, used to provide a main contact pressure to the moving terminal; and an auxiliary elastic member, held between the bottom of the moving terminal and the top of the main elastic member. When the moving terminal is in the closed position, the auxiliary elastic member is axially compressed between the bottom of the moving terminal and the drive shaft, used to provide an auxiliary contact pressure to the moving terminal.

[0044] According to another general technical concept of the present invention, a contactor is provided. The contactor comprises: a housing; a static terminal fixed to the housing; a coil installed in the housing; and the aforementioned contactor moving terminal assembly movably arranged in the housing. When the coil is energized, the driving shaft drives the moving terminal to move from the open position to the closed position under the action of the electromagnetic force generated by the coil.

[0045] First embodiment

[0046] Figure 1-3 The contactor moving terminal assembly according to the first embodiment of the present invention is shown. Figure 1 A three-dimensional schematic diagram showing a contactor moving terminal assembly according to a first embodiment of the present invention; Figure 2 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a first embodiment of the present invention, wherein the movable terminal 1 is in a disconnected position electrically separated from the static terminal 9; Figure 3 An axial cross-sectional view of a movable terminal assembly of a contactor according to a first embodiment of the present invention is shown, wherein the movable terminal 1 is in a closed position in electrical contact with the static terminal 9 .

[0047] like Figures 1 to 3 As shown, in an exemplary embodiment of the present invention, a contactor moving terminal assembly is disclosed. The contactor moving terminal assembly includes: a moving terminal 1, a drive shaft 2, a main elastic member 3 and an auxiliary elastic member 4. The drive shaft 2 is movably connected to the moving terminal 1, and is used to drive the aforementioned moving terminal 1 to move from a disconnected position electrically separated from the static terminal 9 to a closed position electrically contacted with the static terminal 9. The main elastic member 3 is axially compressed between the bottom of the moving terminal 1 and the drive shaft 2, and is used to provide a main contact pressure to the moving terminal 1. The auxiliary elastic member 4 is arranged between the moving terminal 1 and the drive shaft 2.

[0048] like Figure 3As shown, in the illustrated embodiment, when the movable terminal 1 is in the closed position, the auxiliary elastic member 4 is axially compressed between the bottom of the movable terminal 1 and the driving shaft 2 to provide auxiliary contact pressure to the movable terminal 1. Figure 2 As shown, when the movable terminal 1 is in the disconnected position, the auxiliary elastic member 4 is not axially compressed and is not in contact with the movable terminal 1 .

[0049] like Figures 1 to 3 As shown, in the illustrated embodiment, a radially protruding flange portion 21 is formed on the drive shaft 2, the auxiliary elastic member 4 is axially supported on the flange portion 21, and the main elastic member 3 is axially compressed between the bottom of the movable terminal 1 and the flange portion 21 of the drive shaft 2.

[0050] like Figures 1 to 3 As shown, in the illustrated embodiment, the main elastic member 3 can be a coil spring. The auxiliary elastic member 4 includes a main body 40 and a cantilever portion 43. The cantilever portion 43 is connected to the main body 40. The main body 40 is axially supported on the flange portion 21, and the two ends of the main elastic member 3 are respectively against the main body 40 and the movable terminal 1. When the movable terminal 1 is in the closed position, the end of the cantilever portion 43 is against the bottom of the movable terminal 1.

[0051] like Figures 1 to 3 As shown, in the illustrated embodiment, the main body 40 includes a bottom wall 41 and a side wall 42 connected to the bottom wall 41. The cantilever portion 43 is connected to the upper edge of the side wall 42 and extends obliquely relative to the side wall 42. The bottom wall 41 of the main body 40 abuts against the flange portion 21 of the drive shaft 2, and the lower end of the main elastic member 3 abuts against the bottom wall 41 of the main body 40.

[0052] like Figures 1 to 3 As shown, in the illustrated embodiment, the upper end of the driving shaft 2 movably passes through the movable terminal 1, and a limiting member 5 is installed on the upper end of the driving shaft 2. When the movable terminal 1 is in the disconnected position, the limiting member 5 axially abuts against the top of the movable terminal 1 to limit the position of the movable terminal 1. When the movable terminal 1 is in the closed position, the limiting member 5 is separated from the movable terminal 1 by a predetermined distance.

[0053] like Figures 1 to 3 As shown, in the illustrated embodiment, a clamping groove 22 is formed on the outer circumferential surface of the upper end of the driving shaft 2 , and the limiting member 5 is a clamping ring, which is clamped in the clamping groove 22 of the driving shaft 2 .

[0054] Although not shown in the figure, in another exemplary embodiment of the present invention, a contactor is also disclosed. The contactor includes: a housing (not shown), a static terminal 9, a coil (not shown) and the aforementioned contactor moving terminal assembly. The static terminal 9 is fixed to the housing. The coil is installed in the housing. The contactor moving terminal assembly is movably arranged in the housing. When the coil is energized, the drive shaft 2 drives the moving terminal 1 to move from the open position to the closed position under the action of the electromagnetic force generated by the coil.

[0055] Second embodiment

[0056] Figure 4-6 The contactor moving terminal assembly according to the second embodiment of the present invention is shown. Figure 4 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a second embodiment of the present invention, wherein the movable terminal 1 is in a disconnected position electrically separated from the static terminal 9; Figure 5 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a second embodiment of the present invention, wherein the movable terminal 1 is in a closed position in electrical contact with the static terminal 9; Figure 6 A three-dimensional schematic diagram showing an auxiliary elastic member 4 of a movable terminal assembly of a contactor according to a second embodiment of the present invention.

[0057] like Figures 4 to 6 As shown, in an exemplary embodiment of the present invention, a contactor moving terminal assembly is disclosed. The contactor moving terminal assembly includes: a moving terminal 1, a drive shaft 2, a main elastic member 3 and an auxiliary elastic member 4. The drive shaft 2 is movably connected to the moving terminal 1, and is used to drive the aforementioned moving terminal 1 to move from a disconnected position electrically separated from the static terminal 9 to a closed position electrically contacted with the static terminal 9. The main elastic member 3 is axially compressed between the bottom of the moving terminal 1 and the drive shaft 2, and is used to provide a main contact pressure to the moving terminal 1. The auxiliary elastic member 4 is arranged between the moving terminal 1 and the drive shaft 2.

[0058] like Figures 4 to 6 As shown, in the illustrated embodiment, the contactor moving terminal assembly further includes an insulator 6. The upper end of the drive shaft 2 is fixed to the insulator 6. The main elastic member 3 is axially compressed between the moving terminal 1 and the insulator 6, and the auxiliary elastic member 4 is axially supported on the insulator 6. Figure 5 As shown, when the movable terminal 1 is in the closed position, the auxiliary elastic member 4 is axially compressed between the movable terminal 1 and the insulator 6 .

[0059] like Figures 4 to 6As shown, in the embodiment shown in the figure, the main elastic member 3 can be a coil spring. The auxiliary elastic member 4 includes: a main body 40 and a cantilever portion 43. The cantilever portion 43 is connected to the main body 40. The main body 40 is axially supported on the insulator 6, and the two ends of the main elastic member 3 are respectively against the movable terminal 1 and the insulator 6. When the movable terminal 1 is in the closed position, the end of the cantilever portion 43 is against the bottom of the movable terminal 1.

[0060] like Figures 4 to 6 As shown, in the illustrated embodiment, the main body 40 includes a bottom wall 41 supported on the top surface of the insulator 6 and a side wall 42 connected to the bottom wall 41 , and the cantilever portion 43 is connected to the upper edge of the side wall 42 and extends obliquely relative to the side wall 42 .

[0061] like Figures 4 to 6 As shown, in the illustrated embodiment, an opening 44 is formed on the bottom wall 41 of the main body 40 to allow the main elastic member 3 to pass through, and a groove 61 for accommodating the main elastic member 3 is formed on the top of the insulator 6. The main elastic member 3 passes through the bottom wall 41 of the main body 40, and the lower end of the main elastic member 3 is supported on the bottom surface of the groove 61 of the insulator 6.

[0062] like Figures 4 to 6 As shown, in the embodiment shown in the figure, the contactor moving terminal assembly further includes a stopper 5, which includes: a top plate 51 and a pair of side plates 52. The pair of side plates 52 are connected to the top plate 51. The lower part of the pair of side plates 52 of the stopper 5 is fixed to the insulator 6, and the moving terminal 1 and the auxiliary elastic member 4 are accommodated in the stopper 5. Figure 4 As shown, when the movable terminal 1 is in the disconnected position, the top plate 51 of the stopper 5 axially abuts against the top of the movable terminal 1 to limit the position of the movable terminal 1. Figure 5 As shown, when the movable terminal 1 is in the closed position, the top plate 51 of the limiting member 5 is separated from the movable terminal 1 by a predetermined distance.

[0063] like Figures 4 to 6 As shown, in the illustrated embodiment, the insulator 6 is an injection-molded part that is directly molded on the drive shaft 2 and the limiter 5 by an insert injection molding process, so that the drive shaft 2, the limiter 5 and the insulator 6 are formed into an integral component.

[0064] Although not shown in the figure, in another exemplary embodiment of the present invention, a contactor is also disclosed. The contactor includes: a housing (not shown), a static terminal 9, a coil (not shown) and the aforementioned contactor moving terminal assembly. The static terminal 9 is fixed to the housing. The coil is installed in the housing. The contactor moving terminal assembly is movably arranged in the housing. When the coil is energized, the drive shaft 2 drives the moving terminal 1 to move from the open position to the closed position under the action of the electromagnetic force generated by the coil.

[0065] Third embodiment

[0066] Figure 7-8 The contactor moving terminal assembly according to the third embodiment of the present invention is shown. Figure 7 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a third embodiment of the present invention, wherein the movable terminal 1 is in a disconnected position electrically separated from the static terminal 9; Figure 8 An axial cross-sectional view of a contactor moving terminal assembly according to a third embodiment of the present invention is shown, wherein the moving terminal 1 is in a closed position in electrical contact with the stationary terminal 9 .

[0067] like Figure 7 and Figure 8 As shown, in an exemplary embodiment of the present invention, a contactor moving terminal assembly is disclosed. The contactor moving terminal assembly includes: a moving terminal 1, a drive shaft 2, a main elastic member 3 and an auxiliary elastic member 4. The drive shaft 2 is movably connected to the moving terminal 1, and is used to drive the aforementioned moving terminal 1 to move from a disconnected position electrically separated from the static terminal 9 to a closed position electrically contacted with the static terminal 9. The main elastic member 3 is axially compressed between the bottom of the moving terminal 1 and the drive shaft 2, and is used to provide a main contact pressure to the moving terminal 1. The auxiliary elastic member 4 is arranged between the moving terminal 1 and the drive shaft 2.

[0068] like Figure 7 and Figure 8 As shown, in the illustrated embodiment, the contactor moving terminal assembly further includes an insulator 6. The upper end of the drive shaft 2 is fixed to the insulator 6. The main elastic member 3 is axially compressed between the moving terminal 1 and the insulator 6, and the auxiliary elastic member 4 is axially supported on the insulator 6. Figure 8 As shown, when the movable terminal 1 is in the closed position, the auxiliary elastic member 4 is axially compressed between the movable terminal 1 and the insulator 6 .

[0069] like Figure 7 and Figure 8 As shown, in the embodiment shown in the figure, the main elastic member 3 and the auxiliary elastic member 4 are respectively coil springs. The auxiliary elastic member 4 is arranged inside the main elastic member 3. A groove 61 for accommodating the main elastic member 3 and the auxiliary elastic member 4 is formed on the top of the insulator 6, the lower end of the main elastic member 3 is supported on the bottom surface of the groove 61 of the insulator 6, and the auxiliary elastic member 4 is confined in the space between the movable terminal 1 and the bottom surface of the groove 61 of the insulator 6.

[0070] like Figure 7 and Figure 8 As shown, in the embodiment shown in the figure, the contactor moving terminal assembly further includes a stopper 5, and the stopper 5 includes: a top plate 51 and a pair of side plates 52. The pair of side plates 52 are connected to the top plate 51. The lower part of the pair of side plates 52 of the stopper 5 is fixed to the insulator 6, and the moving terminal 1 is accommodated in the stopper 5. Figure 7As shown, when the movable terminal 1 is in the disconnected position, the top plate 51 of the stopper 5 axially abuts against the top of the movable terminal 1 to limit the position of the movable terminal 1. Figure 8 As shown, when the movable terminal 1 is in the closed position, the top plate 51 of the limiting member 5 is separated from the movable terminal 1 by a predetermined distance.

[0071] like Figure 7 and Figure 8 As shown, in the illustrated embodiment, the insulator 6 is an injection-molded part that is directly molded on the drive shaft 2 and the limiter 5 by an insert injection molding process, so that the drive shaft 2, the limiter 5 and the insulator 6 are formed into an integral component.

[0072] Although not shown in the figure, in another exemplary embodiment of the present invention, a contactor is also disclosed. The contactor includes: a housing (not shown), a static terminal 9, a coil (not shown) and the aforementioned contactor moving terminal assembly. The static terminal 9 is fixed to the housing. The coil is installed in the housing. The contactor moving terminal assembly is movably arranged in the housing. When the coil is energized, the drive shaft 2 drives the moving terminal 1 to move from the open position to the closed position under the action of the electromagnetic force generated by the coil.

[0073] Fourth embodiment

[0074] Figure 9-11 The contactor moving terminal assembly according to the fourth embodiment of the present invention is shown. Fig. 9 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a fourth embodiment of the present invention, wherein the movable terminal 1 is in a disconnected position electrically separated from the static terminal 9; Fig.10 An axial cross-sectional view showing a movable terminal assembly of a contactor according to a fourth embodiment of the present invention, wherein the movable terminal 1 is in a closed position in electrical contact with the static terminal 9; Fig.11 A three-dimensional schematic diagram showing an auxiliary elastic member 4 of a movable terminal assembly of a contactor according to a fourth embodiment of the present invention.

[0075] like Figures 9 to 11 As shown, in an exemplary embodiment of the present invention, a contactor moving terminal assembly is disclosed. The contactor moving terminal assembly includes: a moving terminal 1, a drive shaft 2, a main elastic member 3 and an auxiliary elastic member 4. The drive shaft 2 is movably connected to the moving terminal 1, and is used to drive the aforementioned moving terminal 1 to move from a disconnected position electrically separated from the static terminal 9 to a closed position electrically contacted with the static terminal 9. The main elastic member 3 is axially compressed between the moving terminal 1 and the drive shaft 2, and is used to provide a main contact pressure to the moving terminal 1. The auxiliary elastic member 4 can be held between the bottom of the moving terminal 1 and the shoulder 23 of the drive shaft 2 or between the bottom of the moving terminal 1 and the top of the main elastic member 3. As shown Fig.10As shown, when the movable terminal 1 is in the closed position, the auxiliary elastic member 4 is axially compressed between the bottom of the movable terminal 1 and the driving shaft 2 to provide auxiliary contact pressure to the movable terminal 1 .

[0076] like Figures 9 to 11 As shown, in the illustrated embodiment, a shoulder 23 is formed on the drive shaft 2, and the shoulder 23 is suitable for abutting against the bottom of the auxiliary elastic member 4. Fig.10 As shown, when the movable terminal 1 is in the closed position, the auxiliary elastic member 4 is axially compressed between the bottom of the movable terminal 1 and the shoulder 23 of the drive shaft 2. Fig. 9 As shown, when the movable terminal 1 is in the disconnected position, the auxiliary elastic member 4 is not in contact with the shoulder 23 of the driving shaft 2 and is spaced apart from the shoulder 23 by a predetermined distance in the axial direction.

[0077] like Figures 9 to 11 As shown, in the embodiment shown in the figure, the main elastic member 3 is a coil spring, and the auxiliary elastic member 4 is a disc spring. The auxiliary elastic member 4 has a bottom opening and a top opening, and the diameter of the top opening is larger than the bottom opening. The edge of the top opening of the auxiliary elastic member 4 abuts on the bottom surface of the movable terminal 1, and the bottom of the auxiliary elastic member 4 abuts on the top of the main elastic member 3 or the shoulder 23 of the drive shaft 2.

[0078] like Figures 9 to 11 As shown, in the illustrated embodiment, a radially protruding flange portion 21 is formed on the drive shaft 2 , and the main elastic member 3 is axially compressed between the auxiliary elastic member 4 or the bottom of the movable terminal 1 and the flange portion 21 of the drive shaft 2 .

[0079] like Figures 9 to 11 As shown, in the illustrated embodiment, the contactor moving terminal assembly further includes a washer 7, which is supported on the flange portion 21 of the drive shaft 2 and has a diameter greater than the flange portion 21. The upper end and the lower end of the main elastic member 3 respectively abut against the bottom of the auxiliary elastic member 4 and the top surface of the washer 7 or respectively abut against the bottom of the moving terminal 1 and the top surface of the washer 7.

[0080] like Figures 9 to 11 As shown, in the illustrated embodiment, the upper end of the driving shaft 2 movably passes through the movable terminal 1, and a limiting member 5 is installed on the upper end of the driving shaft 2. When the movable terminal 1 is in the disconnected position, the limiting member 5 axially abuts against the top of the movable terminal 1 to limit the position of the movable terminal 1. When the movable terminal 1 is in the closed position, the limiting member 5 is separated from the movable terminal 1 by a predetermined distance.

[0081] like Figures 9 to 11 As shown, in the illustrated embodiment, a clamping groove 22 is formed on the outer circumferential surface of the upper end of the driving shaft 2 , and the limiting member 5 is a clamping ring, which is clamped in the clamping groove 22 of the driving shaft 2 .

[0082] like Figures 9 to 11As shown, in the illustrated embodiment, the elastic coefficient of the auxiliary elastic member 4 is greater than that of the main elastic member 3, so that under the same axial pressure, the axial compression amount of the auxiliary elastic member 4 is less than that of the main elastic member 3. Fig. 9 As shown, when the movable terminal 1 is in the disconnected position, the axial compression of the auxiliary elastic member 4 is very small and can be almost ignored.

[0083] Please note that the present invention is not limited to Figures 9 to 11 In the illustrated embodiment, for example, when the size of the main elastic member 3 is large, the auxiliary elastic member 4 can be located inside the main elastic member 3 and not in contact with the main elastic member 3. At this time, the auxiliary elastic member 4 is supported on the shoulder 23 of the drive shaft 2, and the main elastic member 3 is axially compressed between the bottom of the movable terminal 1 and the flange portion 21 of the drive shaft 2. When the movable terminal 1 is in the closed position, the auxiliary elastic member 4 is axially compressed between the bottom of the movable terminal 1 and the shoulder 23 of the drive shaft 2. When the movable terminal 1 is in the disconnected position, the auxiliary elastic member 4 is confined in the space between the bottom of the movable terminal 1 and the shoulder 23 of the drive shaft 2.

[0084] Although not shown in the figure, in another exemplary embodiment of the present invention, a contactor is also disclosed. The contactor includes: a housing (not shown), a static terminal 9, a coil (not shown) and the aforementioned contactor moving terminal assembly. The static terminal 9 is fixed to the housing. The coil is installed in the housing. The contactor moving terminal assembly is movably arranged in the housing. When the coil is energized, the drive shaft 2 drives the moving terminal 1 to move from the open position to the closed position under the action of the electromagnetic force generated by the coil.

[0085] Those skilled in the art will appreciate that the embodiments described above are exemplary and may be improved upon by those skilled in the art. The structures described in the various embodiments may be freely combined without causing any conflicts in structure or principle, and these changes should fall within the scope of protection of the present invention.

[0086] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to exemplify the preferred implementations of the present invention and should not be construed as limiting the present invention.

[0087] Although some embodiments of the general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

[0088] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. In addition, any element reference signs in the claims shall not be construed as limiting the scope of the present invention.

Claims

1. A contactor moving terminal assembly, characterized in that: include: Moving terminal (1); A drive shaft (2) movably connected to the movable terminal (1) and used to drive the movable terminal (1) to move from an open position electrically separated from the static terminal (9) to a closed position electrically contacted with the static terminal (9); A main elastic member (3) is axially compressed between the bottom of the movable terminal (1) and the driving shaft (2) and is used to provide a main contact pressure to the movable terminal (1); and An auxiliary elastic member (4) is arranged between the movable terminal (1) and the driving shaft (2). When the movable terminal (1) is in the closed position, the auxiliary elastic member (4) is axially compressed between the bottom of the movable terminal (1) and the driving shaft (2) to provide auxiliary contact pressure to the movable terminal (1). When the movable terminal (1) is in the disconnected position, the auxiliary elastic member (4) is not axially compressed.

2. The contactor moving terminal assembly according to claim 1, characterized in that: A radially protruding flange portion (21) is formed on the drive shaft (2), the auxiliary elastic member (4) is axially supported on the flange portion (21), and the main elastic member (3) is axially compressed between the bottom of the movable terminal (1) and the flange portion (21) of the drive shaft (2).

3. The contactor moving terminal assembly according to claim 2, characterized in that: The auxiliary elastic member (4) comprises: a main body portion (40); and The cantilever part (43) is connected to the main body part (40), The main body (40) is axially supported on the flange (21), and both ends of the main elastic member (3) are respectively against the main body (40) and the movable terminal (1). When the movable terminal (1) is in the closed position, the end of the cantilever portion (43) abuts against the bottom of the movable terminal (1).

4. The contactor moving terminal assembly according to claim 3, characterized in that: The main body (40) comprises a bottom wall (41) and a side wall (42) connected to the bottom wall (41), and the cantilever portion (43) is connected to the upper edge of the side wall (42) and extends obliquely relative to the side wall (42); The bottom wall (41) of the main body (40) abuts against the flange portion (21) of the drive shaft (2), and the lower end of the main elastic member (3) abuts against the bottom wall (41) of the main body (40).

5. The contactor moving terminal assembly according to claim 2, characterized in that: The upper end of the driving shaft (2) can movably pass through the movable terminal (1), and a limiting member (5) is installed on the upper end of the driving shaft (2); When the movable terminal (1) is in the disconnected position, the limiting member (5) axially abuts against the top of the movable terminal (1) to limit the position of the movable terminal (1); When the movable terminal (1) is in the closed position, the limiting member (5) is separated from the movable terminal (1) by a predetermined distance.

6. The contactor moving terminal assembly according to claim 5, characterized in that: A clamping groove (22) is formed on the outer peripheral surface of the upper end of the drive shaft (2); the limiting member (5) is a clamping ring, and the clamping ring is clamped in the clamping groove (22) of the drive shaft (2).

7. The contactor moving terminal assembly according to claim 1, characterized in that: Also includes: an insulator (6), the upper end of the drive shaft (2) being fixed to the insulator (6), The main elastic member (3) is axially compressed between the movable terminal (1) and the insulator (6), and the auxiliary elastic member (4) is axially supported on the insulator (6). When the movable terminal (1) is in the closed position, the auxiliary elastic member (4) is axially compressed between the movable terminal (1) and the insulator (6).

8. The contactor moving terminal assembly according to claim 7, characterized in that: The auxiliary elastic member (4) comprises: a main body portion (40); and The cantilever part (43) is connected to the main body part (40), The main body (40) is axially supported on the insulator (6), and the two ends of the main elastic member (3) respectively abut against the movable terminal (1) and the insulator (6), and when the movable terminal (1) is in the closed position, the end of the cantilever portion (43) abuts against the bottom of the movable terminal (1).

9. The contactor moving terminal assembly according to claim 8, characterized in that: The main body (40) comprises a bottom wall (41) supported on the top surface of the insulator (6) and a side wall (42) connected to the bottom wall (41), and the cantilever portion (43) is connected to the upper edge of the side wall (42) and extends obliquely relative to the side wall (42).

10. The contactor moving terminal assembly according to claim 9, characterized in that: An opening (44) is formed on the bottom wall (41) of the main body (40) to allow the main elastic member (3) to pass through, and a groove (61) is formed on the top of the insulator (6) to accommodate the main elastic member (3); The main elastic member (3) passes through the bottom wall (41) of the main body (40), and the lower end of the main elastic member (3) is supported on the bottom surface of the groove (61) of the insulator (6).

11. The contactor moving terminal assembly according to claim 7, characterized in that: The main elastic member (3) and the auxiliary elastic member (4) are respectively coil springs, and the auxiliary elastic member (4) is arranged inside the main elastic member (3); A groove (61) for accommodating the main elastic member (3) and the auxiliary elastic member (4) is formed on the top of the insulator (6), and the lower ends of the main elastic member (3) and the auxiliary elastic member (4) are supported on the bottom surface of the groove (61) of the insulator (6).

12. The contactor moving terminal assembly according to claim 7, characterized in that: Also includes: The limiting member (5) comprises: a top plate (51); and A pair of side plates (52) connected to the top plate (51), The lower parts of a pair of side plates (52) of the limiting member (5) are fixed to the insulator (6), and the movable terminal (1) and the auxiliary elastic member (4) are accommodated in the limiting member (5). When the movable terminal (1) is in the disconnected position, the top plate (51) of the limiting member (5) axially abuts against the top of the movable terminal (1) to limit the position of the movable terminal (1); When the movable terminal (1) is in the closed position, the top plate (51) of the limiting member (5) is separated from the movable terminal (1) by a predetermined distance.

13. The contactor moving terminal assembly according to claim 12, characterized in that: The insulator (6) is an injection-molded part that is directly molded on the drive shaft (2) and the limiter (5) through an embedded injection molding process, so that the drive shaft (2), the limiter (5) and the insulator (6) are formed into an integral component.

14. A contactor moving terminal assembly, characterized in that: include: Moving terminal (1); A drive shaft (2) movably connected to the movable terminal (1) and used to drive the movable terminal (1) to move from an open position electrically separated from the static terminal (9) to a closed position electrically contacted with the static terminal (9); A main elastic member (3) is axially compressed between the movable terminal (1) and the drive shaft (2) and is used to provide a main contact pressure to the movable terminal (1); and The auxiliary elastic member (4) is held between the bottom of the movable terminal (1) and the top of the main elastic member (3). When the movable terminal (1) is in the closed position, the auxiliary elastic member (4) is axially compressed between the bottom of the movable terminal (1) and the drive shaft (2) to provide auxiliary contact pressure to the movable terminal (1).

15. The contactor moving terminal assembly according to claim 14, characterized in that: A shoulder (23) is formed on the driving shaft (2), and the shoulder (23) is suitable for abutting against the bottom of the auxiliary elastic member (4); When the movable terminal (1) is in the closed position, the auxiliary elastic member (4) is axially compressed between the bottom of the movable terminal (1) and the shoulder (23) of the drive shaft (2); When the movable terminal (1) is in the disconnected position, the auxiliary elastic member (4) does not contact the shoulder (23) of the drive shaft (2) and is spaced apart from the shoulder by a predetermined distance in the axial direction.

16. The contactor moving terminal assembly according to claim 14, characterized in that: The main elastic member (3) is a coil spring, the auxiliary elastic member (4) is a disc spring, the auxiliary elastic member (4) has a bottom opening and a top opening, and the diameter of the top opening is larger than that of the bottom opening; The edge of the top opening of the auxiliary elastic member (4) abuts against the bottom surface of the movable terminal (1), and the bottom of the auxiliary elastic member (4) abuts against the top of the main elastic member (3).

17. The contactor moving terminal assembly according to claim 14, characterized in that: A radially protruding flange portion (21) is formed on the drive shaft (2), and the main elastic member (3) is axially compressed between the bottom of the auxiliary elastic member (4) and the flange portion (21) of the drive shaft (2).

18. The contactor moving terminal assembly according to claim 14, characterized in that: Also includes: a washer (7) supported on the flange portion (21) of the drive shaft (2) and having a diameter larger than that of the flange portion (21), The upper end and the lower end of the main elastic member (3) respectively abut against the bottom of the auxiliary elastic member (4) and the top surface of the gasket (7).

19. The contactor moving terminal assembly according to claim 14, characterized in that: The upper end of the driving shaft (2) can movably pass through the movable terminal (1), and a limiting member (5) is installed on the upper end of the driving shaft (2); When the movable terminal (1) is in the disconnected position, the limiting member (5) axially abuts against the top of the movable terminal (1) to limit the position of the movable terminal (1); When the movable terminal (1) is in the closed position, the limiting member (5) is separated from the movable terminal (1) by a predetermined distance.

20. The contactor moving terminal assembly according to claim 19, characterized in that: A clamping groove (22) is formed on the outer peripheral surface of the upper end of the drive shaft (2); the limiting member (5) is a clamping ring, and the clamping ring is clamped in the clamping groove (22) of the drive shaft (2).

21. The contactor moving terminal assembly according to any one of claims 14 to 20, characterized in that: The auxiliary elastic member (4) has a greater elastic coefficient than the main elastic member (3), so that under the same axial pressure, the axial compression amount of the auxiliary elastic member (4) is smaller than that of the main elastic member (3).

22. A contactor, characterized in that: include: case; A static terminal, fixed to the housing; A coil installed in the housing; and The contactor movable terminal assembly according to any one of claims 1 to 21 is movably arranged in the housing, When the coil is energized, the drive shaft (2) drives the movable terminal (1) to move from the open position to the closed position under the action of the electromagnetic force generated by the coil.

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