Elevator roller switch

Abstract

The invention discloses an elevator roller switch which comprises a shell, the bottom of the shell is connected with a roller support through a rotating shaft, rollers are installed at the two ends of the roller support, a static contact is installed on the upper portion of the end, away from the rotating shaft, in the shell, and a spring is vertically arranged in the shell. The lower end of the spring is connected with a guide rod, the guide rod vertically penetrates through a guide hole in the shell to be rotationally connected with one end of the roller support, and a through opening penetrating left and right is formed in the middle of the guide rod. And the elastic sheet transversely penetrates through the through opening, a first end of the elastic sheet is provided with a movable contact which is used for being in contact with the static contact, and a second end of the elastic sheet is fixedly connected with the shell. The roller switch can solve the problems that the contact stroke of a contact is not stable and a spring is easy to fall off due to the fact that an existing roller switch adopts a swing arm as a part driven by an elastic piece.

Description

Technical Field

[0001] The invention relates to the technical field of elevator accessories, in particular to an elevator roller switch. Background Art

[0002] The elevator roller switch device is mainly used as a safety switch for elevator doors and other equipment. The existing elevator roller switch generally includes a housing, a roller bracket and a swing arm. For example, in the utility model patent with publication number CN205367360U, the rotation of the roller bracket drives the swing arm to swing in an arc, and the swing arm drives the spring to move to achieve contact and separation of the two contacts. A spring for resetting is generally installed between the end of the swing arm and the housing. However, the current assembly angle of the swing arm structure is difficult to control. A slight error will cause the contact stroke of the product contact to be unstable, resulting in a low qualified rate of the finished product and low assembly efficiency. Moreover, the swing arm structure of the prior art moves at a certain angle (spring tilt) to the reset spring, and there is a risk of the spring coming out.

[0003] In addition, since the swing stroke of the rotating arm occupies a relatively large space, the elevator roller switch is relatively large in size and has many parts, making it difficult to effectively protect the internal components, which affects the service life and subsequent maintenance of the product. Summary of the invention

[0004] The invention provides an elevator roller switch, which can solve the problems of unstable contact stroke and easy spring falling out caused by the existing roller switch using a swing arm as a spring-driven component.

[0005] To achieve the above object, the present invention provides the following technical solution: an elevator roller switch, comprising: a housing, the bottom of the housing is connected to a roller bracket through a rotating shaft, rollers are installed at both ends of the roller bracket, a static contact is installed at the upper part of one end of the housing away from the rotating shaft, a spring is vertically arranged inside the housing, the lower end of the spring is connected to a guide rod, the guide rod vertically passes through a guide hole on the housing and is rotatably connected to one end of the roller bracket, and a through hole is arranged in the middle of the guide rod to penetrate left and right;

[0006] The spring piece passes through the through opening horizontally, the first end of the spring piece is provided with a moving contact for contacting the static contact, the second end of the spring piece is connected and fixed to the shell, and the guide rod is used to replace the rotating arm. The guide rod and the spring are on the same central axis. When the switch is actuated, the spring and the guide rod move coaxially without tilting, which greatly improves the stability of the spring and the reliability of the product. In addition, the space occupied by the up and down movement of the guide rod is very small, which greatly reduces the width of the product and is conducive to the miniaturization of the product.

[0007] Preferably, a pin is provided at one end of the roller bracket connected to the guide rod, and a waist hole is provided at the lower end of the guide rod. The pin passes through the waist hole, so that the swing of the roller bracket can be converted into the up and down movement of the guide rod.

[0008] Preferably, a spring positioning groove corresponding to the spring is arranged at the top of the guide rod, and an upwardly protruding spring positioning column is arranged in the middle of the spring positioning groove, which can improve the stability of the contact and cooperation between the spring and the guide rod, and the spring is not easily radially offset.

[0009] Preferably, a sliding guide structure cooperating with the inner wall of the shell and / or the inner wall of the guide hole is provided on the side wall of the guide rod, and the sliding guide structure can guide the lifting and lowering of the guide rod to prevent the guide rod from tilting or rotating.

[0010] Preferably, a mounting platform is provided on the inner upper part of the shell, a spring positioning seat is installed on the mounting platform at a position corresponding to the spring, a positioning inner cavity is provided on the lower side of the spring positioning seat, the upper end of the spring extends into the positioning inner cavity, the mounting platform facilitates the installation of the spring positioning seat, and the spring positioning seat cooperates with the guide rod to limit the two ends of the spring.

[0011] Preferably, the static contact is mounted on a first conductive connection piece, the first conductive connection piece is clamped on the mounting platform, the second end of the spring sheet is connected to a second conductive connection piece, and the first conductive connection piece and the second conductive connection piece facilitate wiring of the spring sheet and the static contact.

[0012] Preferably, a multi-cavity boss is provided at the lower part of one side of the interior of the shell near the rotating shaft, and at least one hollow cavity is provided in the multi-cavity boss, and a first fixing block and a second fixing block are provided in the hollow cavity, and the second ends of the second conductive connecting piece and the spring piece are connected to the first fixing block through the side of the multi-cavity boss by the first screw for fixing, and a mounting bracket is installed on one side of the shell, and the mounting bracket is connected to the second fixing block through the side wall of the shell by the second screw for fixing. By setting the multi-cavity boss, the internal space of the shell can be utilized to set more fixing structures, and the overall strength of the shell can be increased, and the first fixing block and the second fixing block can be used to achieve locking and fixing of the first screw and the second screw, and there is no need to set threaded holes on the shell during processing.

[0013] Preferably, an inserting groove is provided on the upper side of the end surface of the shell close to the rotating shaft, and a threading guide block is inserted into the inserting groove. The threading guide block can fix the connecting wires entering the shell and can also seal the inside of the shell.

[0014] Preferably, one side wall and top wall of the shell are open, and a removable side panel is installed on the outside of the shell, and the removable side panel covers and surrounds the open side wall and top wall of the shell, so that the entire internal structure of the shell can be exposed after the removable side panel is removed, which is convenient for replacement and maintenance of parts and also convenient for assembly.

[0015] Preferably, both ends of the removable side panels are provided with snap-on plates extending toward the side walls of the shell, the snap-on plates are provided with snap-on holes, the side walls of the shell are provided with limiting grooves matching the snap-on plates, the limiting grooves are provided with snap-on protrusions for snapping with the snap-on holes, and the positioning and insertion of the snap-on plates and the limiting grooves can ensure the sealing and firmness of the removable side panels after snap-fitting with the shell, and they are not easy to loosen.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, a guide rod is used to replace the rotating arm. The guide rod and the spring are on the same central axis. When the switch is actuated, the spring and the guide rod move coaxially without tilting, which greatly improves the stability of the spring and enhances the reliability of the product. In addition, the space occupied by the up and down movement of the guide rod is very small, which greatly reduces the width of the product and is conducive to the miniaturization of the product. The overall protection effect is good, the service life is increased, and the later maintenance and replacement are convenient, thereby solving the problems of unstable contact stroke and easy spring disengagement caused by the existing roller switch using the swing arm as the spring-driven component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a front cross-sectional structural diagram of the contact point of the present invention in a non-contact state;

[0020] Figure 3 It is a front view cross-sectional structural diagram of the contact state of the contact point of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the present invention after removing the detachable side panels;

[0022] Figure 5 It is a three-dimensional structural diagram of the housing of the present invention;

[0023] Figure 6 It is a schematic diagram of the installation process of the detachable side panel of the present invention.

[0024] Reference numerals:

[0025] 1. Shell, 11. Multi-cavity boss, 111. Positioning slide, 12. Hollow cavity, 13. First fixing block, 14. Mounting platform, 141. Positioning seat slot, 142. Electrical connection piece slot, 15. Spring, 16. Spring positioning seat, 161. Positioning inner cavity, 17. Second conductive connection piece, 18. First screw, 19. Slide, 2. Removable side panel, 21. Second screw, 22. First conductive connection piece, 221. Limiting folding edge, 23 , threading guide block, 24, plug-in slot, 25, guide hole, 26, snap-on protrusion, 27, pin shaft, 28, snap-on plate, 29, snap-on hole, 3, roller, 31, frame slot, 32, limit slot, 4, mounting bracket, 5, rotating shaft, 6, roller bracket, 7, guide rod, 71, through port, 72, contact boss, 73, spring positioning slot, 74, convex rib, 75, spring positioning column, 76, waist hole, 8, moving contact, 9, spring piece, 10, static contact. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] like Figure 1-6 As shown, the present invention solves the problems of unstable contact stroke and easy spring disengagement caused by the existing roller switch using a swing arm as a spring-driven component, and provides the following technical solutions: an elevator roller switch, comprising a housing 1, the bottom of the housing 1 is connected to a roller bracket 6 through a rotating shaft 5, rollers 3 are installed at both ends of the roller bracket 6, a static contact 10 is installed at the upper end of the housing 1 away from the rotating shaft 5, a spring 15 is vertically arranged inside the housing 1, the lower end of the spring 15 is connected to a guide rod 7, the guide rod 7 vertically passes through a guide hole 25 on the housing 1 and is rotatably connected to one end of the roller bracket 6, and a through hole 71 is arranged in the middle of the guide rod 7;

[0028] The spring piece 9 passes through the through opening 71 horizontally. The first end of the spring piece 9 is provided with a moving contact 8 for contacting the static contact 10. The second end of the spring piece 9 is connected and fixed to the housing 1. The guide rod 7 is used to replace the rotating arm. The guide rod 7 and the spring 15 are on the same central axis. When the switch is actuated, the spring 15 moves coaxially with the guide rod 7 without tilting, which greatly improves the stability of the spring and the reliability of the product. In addition, the space occupied by the up and down movement of the guide rod 7 is very small, which greatly reduces the width of the product and is conducive to the miniaturization of the product.

[0029] As the working principle of this embodiment, the elevator roller switch is installed at the upper end of the elevator door and moves with the movement of the elevator door. When the roller bracket 6 of the elevator roller switch encounters a raised portion, it will rotate around the rotating shaft 5. When one end of the roller bracket 6 is tilted upward, it will push the guide rod 7 to rise and compress the spring 15. The spring sheet 9 itself is elastic, so when the guide rod 7 rises, the spring sheet 9 also deforms and is always in contact with the top of the through opening 71. The moving contact 8 rises until it contacts the static contact 10, so that the moving contact 8 and the static contact 10 can be connected. At this time, the guide rod 7 can continue to move upward for a distance until the roller bracket 6 cannot rotate.

[0030] When the roller bracket 6 leaves the raised portion, the spring 15 drives the guide rod 7 to move downward, thereby resetting the roller bracket 6 and pressing the spring sheet 9 downward to disengage the moving contact 8 from the static contact 10.

[0031] Among them, a pin 27 is provided at one end of the roller bracket 6 connected to the guide rod 7, and a waist hole 76 is provided at the lower end of the guide rod 7. The pin 27 passes through the waist hole 76, so that the swing of the roller bracket 6 can be converted into the up and down movement of the guide rod 7. The guide hole 25 can adopt a non-cylindrical structure to match the shape of the guide rod 7 to prevent the guide rod 7 from rotating.

[0032] In order to reduce the friction between the guide rod 7 and the spring sheet 9, a downwardly protruding contact boss 72 is provided at the top of the through opening 71. The surface of the contact boss 72 is an arc surface, and contacts with the spring sheet 9 when the guide rod 7 descends. The friction can be reduced by the contact boss 72 and the spring sheet 9. The contact boss 72 is arranged at one end of the top of the through opening 71 close to the moving contact 8.

[0033] In order to position the spring 15, a spring positioning groove 73 corresponding to the spring 15 is provided at the top of the guide rod 7, and an upwardly protruding spring positioning column 75 is provided in the middle of the spring positioning groove 73, which can improve the stability of the contact and cooperation between the spring 15 and the guide rod 7. The spring 15 is not easy to deviate radially. A protruding positioning column can also be provided in the middle of the spring positioning groove 73, and the lower end of the spring 15 is sleeved on the outside of the positioning column to prevent the spring 15 from deviating.

[0034] In order to further limit the lifting and lowering of the guide rod 7, a sliding guide structure that cooperates with the inner wall of the shell 1 and / or the inner wall of the guide hole 25 is provided on the side wall of the guide rod 7. The sliding guide structure can guide the lifting and lowering of the guide rod 7 to prevent the guide rod 7 from tilting or rotating. In this embodiment, the sliding guide structure can adopt the cooperation of the convex rib 74 and the slide groove 19, or the cooperation of the slide rail and the slider.

[0035] like Figure 2-5As shown, a mounting platform 14 is provided on the inner upper part of the shell 1, and a spring locating seat 16 is installed at a position corresponding to the spring 15 on the mounting platform 14, and a positioning inner cavity 161 is provided on the lower side of the spring locating seat 16, and the upper end of the spring 15 extends into the positioning inner cavity 161, so that the upper and lower ends of the spring 15 have reliable positioning structures, so that the compression and extension of the spring 15 will not deflect, and the mounting platform 14 is convenient for installing the spring locating seat 16, and the spring locating seat 16 cooperates with the guide rod 7 to limit the two ends of the spring 15. Specifically, a notch is provided in the middle of the mounting platform 14, and locating seat slots 141 are symmetrically provided on both sides of the notch. The two sides of the spring locating seat 16 can be inserted into the locating seat slots 141 from front to back, which is convenient for disassembly, assembly and replacement of the spring 15.

[0036] In this embodiment, if Figure 2-4 As shown, the static contact 10 is installed on the first conductive connecting piece 22, and the first conductive connecting piece 22 is clamped on the mounting platform 14. The second end of the spring piece 9 is connected to the second conductive connecting piece 17. The first conductive connecting piece 22 and the second conductive connecting piece 17 are convenient for wiring the spring piece 9 and the static contact 10, wherein the first conductive connecting piece 22 can be inserted from front to back into the corresponding electrical connecting piece slot 142 on the mounting platform 14, and the upper parts of the first conductive connecting piece 22 and the second conductive connecting piece 17 are obliquely provided with wiring terminals for convenient wiring, and the first conductive connecting piece 22 is provided with limited folded edges 221 on both sides of the wiring terminals, and the limited folded edges 221 buckle the upper edge of the electrical connecting piece slot 142 to fix the first conductive connecting piece 22.

[0037] In this embodiment, if Figure 2-5As shown, a multi-cavity boss 11 is provided at the lower part of one side of the interior of the shell 1 close to the rotating shaft 5, and at least one hollow cavity 12 is provided on the multi-cavity boss 11, and a first fixing block 13 is provided in the hollow cavity 12, and the second end of the second conductive connecting piece 17 and the spring piece 9 is connected to the first fixing block 13 through the side of the multi-cavity boss 11 by the first screw 18 for fixing, and a second fixing block 20 is also provided in the hollow cavity 12, and a mounting bracket 4 is installed on one side of the shell 1, and the mounting bracket 4 is connected to the second fixing block 20 through the side wall of the shell 1 by the second screw 21 for fixing, and by providing the multi-cavity boss 11, the internal space of the shell 1 can be used to set more fixing structures, and the overall strength of the shell 1 can be increased, and the first fixing block 13 and the second fixing block 20 can be used to realize the locking and fixing of the first screw 18 and the second screw 21, and there is no need to set threaded holes on the shell during processing. A pair of positioning slots 111 are arranged side by side at the top of the multi-cavity boss 11 and at a position corresponding to the second conductive connection piece 17 , and the second conductive connection piece 17 slides transversely into the positioning slots 111 for front and rear position limiting.

[0038] like Figure 4-5 As shown, an inserting groove 24 is provided on the upper side of the end surface of the shell 1 close to the rotating shaft 5, and a threading guide block 23 is inserted into the inserting groove 24. The threading guide block 23 can fix the connecting wires entering the shell 1 and can also seal the inside of the shell 1. The threading guide block 23 can be made of rubber material, which is beneficial to the sealing of the threading position.

[0039] In this embodiment, if Figure 1 , 4 -5, one side wall and top wall of the shell 1 are open, and a removable side panel 2 is installed on the outer side of the shell 1, and the removable side panel 2 covers and surrounds the open side wall and top wall of the shell 1, so that the removable side panel 2 can be removed to expose the entire internal structure of the shell 1, which is convenient for replacement and maintenance of parts and assembly. Both ends of the removable side panel 2 are provided with snap-on plates 28 extending toward the side wall of the shell 1, and the snap-on plates 28 are provided with snap-on holes 29. The side wall of the shell 1 is provided with a limiting groove 32 matching the snap-on plate 28, and the limiting groove 32 is provided with a snap-on protrusion 26 for snapping with the snap-on hole 29. The positioning and insertion of the snap-on plate 28 and the limiting groove 32 can ensure the sealing and firmness of the removable side panel 2 and the shell 1 after snapping, and it is not easy to loosen.

[0040] In order to facilitate the installation of the detachable side panel 2, a frame groove 31 can be provided on the upper side of the limiting groove 32, and the depth of the frame groove 31 is smaller than the depth of the limiting groove 32. Figure 6As shown, when the removable side panel 2 is installed, the snap plate 28 is first inserted horizontally into the frame groove 31. At this time, the snap protrusion 26 has not yet been snapped with the snap hole 29. The snap plate 28 is first positioned, and then the removable side panel 2 is pressed downward to make the snap plate 28 slide downward into the limit groove 32. This assembly method is more reliable and causes less damage to the snap hole 29 and the snap protrusion 26.

[0041] In addition, the detachable side panel 2 is made of transparent material, which makes it easy to observe the working process of the internal components of the shell 1.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An elevator roller switch, comprising: A housing (1), wherein the bottom of the housing (1) is connected to a roller bracket (6) via a rotating shaft (5), rollers (3) are mounted on both ends of the roller bracket (6), and a static contact (10) is mounted on the upper portion of one end of the housing (1) away from the rotating shaft (5), characterized in that: A spring (15) is vertically arranged inside the housing (1), the lower end of the spring (15) is connected to a guide rod (7), the guide rod (7) vertically passes through a guide hole (25) on the housing (1) and is rotatably connected to one end of the roller bracket (6), and a through hole (71) penetrating left and right is arranged in the middle of the guide rod (7); The spring piece (9) passes through the through opening (71) transversely, the first end of the spring piece (9) is provided with a movable contact (8) for contacting the static contact (10), and the second end of the spring piece (9) is connected and fixed to the housing (1).

2. The elevator roller switch according to claim 1, characterized in that: One end of the roller bracket (6) connected to the guide rod (7) is provided with a pin shaft (27), and the lower end of the guide rod (7) is provided with a waist hole (76), and the pin shaft (27) passes through the waist hole (76).

3. The elevator roller switch according to claim 1, characterized in that: A spring positioning groove (73) corresponding to the spring (15) is arranged at the top of the guide rod (7), and a spring positioning column (75) protruding upward is arranged in the middle of the spring positioning groove (73).

4. The elevator roller switch according to claim 1, characterized in that: The side wall of the guide rod (7) is provided with a sliding guide structure that matches the inner side wall of the housing (1) and / or the inner side wall of the guide hole (25).

5. The elevator roller switch according to claim 1, characterized in that: A mounting platform (14) is provided on the inner upper part of the housing (1), a spring positioning seat (16) is installed on the mounting platform (14) at a position corresponding to the spring (15), a positioning inner cavity (161) is provided on the lower side of the spring positioning seat (16), and the upper end of the spring (15) extends into the positioning inner cavity (161).

6. The elevator roller switch according to claim 5, characterized in that: The static contact (10) is mounted on a first conductive connection piece (22), the first conductive connection piece (22) is clamped on a mounting platform (14), and the second end of the spring piece (9) is connected to a second conductive connection piece (17).

7. The elevator roller switch according to claim 6, characterized in that: A multi-cavity boss (11) is provided at a lower portion of one side of the housing (1) near the rotating shaft (5), and at least one hollow cavity (12) is provided in the multi-cavity boss (11), and a first fixing block (13) and a second fixing block (20) are provided in the hollow cavity (12). The second end of the second conductive connecting piece (17) and the spring sheet (9) are connected to the first fixing block (13) by passing through the side of the multi-cavity boss (11) via a first screw (18) for fixing, and a mounting bracket (4) is installed on one side of the housing (1), and the mounting bracket (4) is connected to the second fixing block (20) by passing through the side wall of the housing (1) via a second screw (21) for fixing.

8. The elevator roller switch according to claim 1, characterized in that: An inserting groove (24) is arranged on the upper side of an end surface of the housing (1) close to the rotating shaft (5), and a threading guide block (23) is inserted into the inserting groove (24).

9. The elevator roller switch according to claim 1, characterized in that: One side wall and the top wall of the shell (1) are open, and a detachable side panel (2) is installed on the outside of the shell (1), and the detachable side panel (2) covers and surrounds the open side wall and the top wall of the shell (1).

10. The elevator roller switch according to claim 9, characterized in that: Both ends of the removable side panel (2) are provided with snap-on plates (28) extending toward the side wall of the shell (1), and snap-on holes (29) are provided on the snap-on plates (28). The side wall of the shell (1) is provided with a limiting groove (32) matching the snap-on plate (28), and a snap-on protrusion (26) for snapping with the snap-on hole (29) is provided in the limiting groove (32).

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