Synchronous switching device, multi-door panel cabinet and multi-door panel synchronous switching method

Abstract

A synchronous switch device, a multi-door plate cabinet and a multi-door plate synchronous switch method, the synchronous switch device comprises a rotatable cam, a rotating shaft is arranged in the middle of the cam, the wheel body side of the cam has a protruding part and a non-protruding part, and the synchronous switch device further comprises a telescopic mechanism for transmitting the movement of the cam, the telescopic mechanism comprises a wheel arranged close to the edge of the cam, a connecting rod mechanism connected with the wheel, and a slider mounted at the end of the connecting rod mechanism and capable of freely sliding along a sliding groove; the sliding direction of the slider in the sliding groove is parallel to the axis of the rotating shaft of the cam. The synchronous switch device changes the common opening and closing mode of the door plate and the opening and closing position, does not need to set a clamping groove for the lock tongue, can synchronously open and close the four door plates, and can realize the synchronous opening and closing of multi-door plates based on analogy.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical processing, and particularly relates to a synchronous switch device, a multi-door plate cabinet and a multi-door plate synchronous switch method. BACKGROUND

[0002] At present, general door plates are separately matched with locks, and a clamping groove needs to be arranged for the lock tongue. However, for some mechanical structures limited by operation space, there is no position for clamping the lock tongue, and the safety requirement of the door lock is not high, so the commonly used door lock is not suitable, and the opening and closing is inconvenient.

[0003] Firstly, taking the tool box in the factory workshop as an example, the tool box does not contain too valuable tools, and generally contains wrenches and the like. At this time, a lock with high safety is not needed, and only the tool box needs to be closed. Moreover, the things in the tool box are too miscellaneous and too many. If the conventional tool box is used, only one side can be opened, so the tools in the deep part of the tool box are not easy to take out.

[0004] For some hydraulic system trolleys, generally composed of various valve blocks, oil tanks and oil pipes and the like, the trolley needs a protective cover (i.e. cabinet body) to prevent dust and protect, and make the whole disordered hydraulic system more flat and beautiful. The hydraulic system generally needs to be regularly maintained and cleaned, so in order to facilitate maintenance, a maintenance opening is generally reserved on each side. However, the general maintenance opening is the structure of the door, the maintenance opening is small, and the operation space of the operator is limited. In addition, according to the conventional door structure, a lock needs to be installed on the door, and a clamping groove for the lock tongue needs to be reserved on the door frame. The specific structure is shown in Figure 14 , 21, lock; 22, lock tongue; 23, clamping groove of the lock tongue. However, for the protective cover limited by space and environment and having a relatively simple structure, only several thin plates are simply welded to form the protective cover, and there is no position for clamping. If the conventional lock structure is forcibly used, a clamping groove needs to be specially arranged, which makes the structure more complex. On the other hand, when the lock is opened, it needs to be opened step by step, and the lock cannot be opened synchronously. SUMMARY

[0005] The present application aims to provide a synchronous switch device, a multi-door plate cabinet and a multi-door plate synchronous switch method, which can synchronously open and close the multi-sided door plate without using the conventional lock.

[0006] The technical scheme of the present application is as follows: a synchronous switch device, comprising a rotatable cam, a rotating shaft being arranged in the middle of the cam, a protruding part and a non-protruding part being arranged on the side of the wheel body of the cam, a telescopic mechanism for transmitting the movement of the cam, the telescopic mechanism comprising a wheel arranged close to the edge of the cam, a connecting rod mechanism connected with the wheel, and a sliding block arranged at the end of the connecting rod mechanism and capable of freely sliding along a sliding groove; the sliding direction of the sliding block in the sliding groove is parallel to the axis of the rotating shaft of the cam.

[0007] The connecting rod mechanism comprises a horizontal rod freely moving along the cam radial direction, an axial rod arranged along the plane where the axis of the cam rotation shaft is located; the horizontal rod is freely fitted on the support; the horizontal rod comprises a horizontal rod one and a horizontal rod two; the slider comprises a slider one and a slider two; when the axial rod is a single rod, one end of the single rod is connected with the horizontal rod two and the other end of the single rod is hingedly connected with the slider two; when the axial rod is composed of a long rod and a short rod hingedly connected with the long rod, the long rod is rigidly connected with the horizontal rod one and the short rod is hingedly connected with the slider one; the rigid connection means that no relative displacement occurs between the two when an external force is applied, that is, the two have become an integral whole, similar to being welded together or fixed together by screws;

[0008] When the axial rod is a single rod, the single rod, the horizontal rod two, the wheel and the slider two form a single rod telescopic mechanism; when the axial rod is composed of a long rod and a short rod hingedly connected with the long rod, the long rod, the short rod, the horizontal rod one, the wheel and the slider one form a double rod telescopic mechanism.

[0009] During the rotation of the cam: when the double rod telescopic mechanism corresponds to the protruding part and the single rod telescopic mechanism corresponds to the non-protruding part of the side of the wheel body of the cam, the double rod telescopic mechanism and the single rod telescopic mechanism are in the extended state, and the slider one of the double rod telescopic mechanism and the slider two of the single rod telescopic mechanism are at the low end of the sliding groove; when the double rod telescopic mechanism corresponds to the non-protruding part of the side of the wheel body of the cam and the single rod telescopic mechanism corresponds to the protruding part of the side of the wheel body of the cam, the double rod telescopic mechanism and the single rod telescopic mechanism are in the retracted state, and the slider one of the double rod telescopic mechanism and the slider two of the single rod telescopic mechanism are at the high end of the sliding groove.

[0010] The projection of the cam on the plane perpendicular to the rotation shaft is a rotationally symmetric figure with the rotation shaft as the center of rotation; the edge of the cam has a groove; the edge of the wheel has a ridge matching the groove.

[0011] It also comprises a driving device for driving the rotation of the cam, and the driving device is a micro motor.

[0012] When the synchronous switch device is used for a four-door plate cabinet: the double rod telescopic mechanism and the single rod telescopic mechanism are both two, the two double rod telescopic mechanisms are oppositely arranged, and the two single rod telescopic mechanisms are oppositely arranged; the cam is an oval wheel, the long axis of the oval wheel is L1, the long axis of the oval wheel corresponds to the two protruding parts of the cam, the short axis is L2, the cam is provided with a groove of the cam, and the wheel is clamped in the groove of the cam;

[0013] During the rotation of the cam: when the long axis L1 is collinear with the horizontal rod one, at the same time the short axis L2 is collinear with the horizontal rod two, the slider one and the slider two are both at the bottom end of the sliding groove, that is, the doors of the four sides of the four-door plate cabinet are all in the locked state;

[0014] When the short axis L2 is collinear with the horizontal rod, at the same time the long axis L1 is collinear with the horizontal rod two, the slider one and the slider two are both at the highest end of the sliding slot, that is, the doors of the four door plate cabinets are all in the unlocked state.

[0015] The application is characterized in that the four doors can be opened simultaneously, in order to ensure the simultaneous opening or locking, the application adopts the single rod telescopic mechanism structure in front and back and the double rod telescopic mechanism structure in left and right. Either the horizontal rod two or the horizontal rod one will make the extension and telescopic movement, so they are collectively called the telescopic mechanism.

[0016] A kind of multi-door plate cabinet with door, including cabinet body, the top plate of the upper part of cabinet body, the door plate of the side of cabinet body, also including the synchronous switch device for synchronously locking / unlocking door plate as described above, door plate has lower sliding slot, top plate has upper sliding slot corresponding with lower sliding slot, upper and lower sliding slots form a complete sliding slot matched with slider, support is fixed on top plate.

[0017] The synchronous switch device is covered with shell.

[0018] The top plate has support under it, and each side of the cabinet body is composed of two door plates, and each door plate has a lower half sliding slot at its inner side, and the two lower half sliding slots form a lower sliding slot when the two door plates are closed.

[0019] A multi-door plate synchronous switch method for a multi-door plate cabinet with space limitation, the top plate of the upper part of the cabinet body is provided with a synchronous switch device, the synchronous switch device includes a cam, a rotating shaft is arranged in the middle of the cam, the side of the wheel body of the cam has a protruding part and a non-protruding part, and the synchronous switch device further includes a telescopic mechanism for transmitting the movement of the cam, the telescopic mechanism includes a wheel arranged close to the edge of the cam, a connecting rod mechanism connected with the wheel, and a slider mounted at the end of the connecting rod mechanism and capable of freely sliding along a sliding slot; the sliding direction of the slider in the sliding slot is parallel to the axis of the rotating shaft of the cam.

[0020] The connecting rod mechanism includes a horizontal rod capable of freely moving along the radial direction of the cam and an axial rod arranged along the plane of the axis of the rotating shaft; the horizontal rod is freely arranged on a support; the horizontal rod includes a horizontal rod one and a horizontal rod two; the slider includes a slider one and a slider two; when the axial rod is a single rod, one end of the single rod is connected with the horizontal rod two, and the other end of the single rod is hinged with the slider two; when the axial rod is composed of a long rod and a short rod hinged with the long rod, the long rod is rigidly connected with the horizontal rod one, and the short rod is hinged with the slider one.

[0021] The door plate on the side of the cabinet body is provided with a lower sliding slot, and the top plate is provided with an upper sliding slot corresponding to the lower sliding slot.

[0022] When the cam rotates, the cam transmits the movement to the wheel, the wheel transmits the movement to the horizontal rod, and the horizontal rod arranged on the support freely extends and retracts.

[0023] When the axial rod is a single rod, the single rod, the second horizontal rod, the wheel, and the second slider form a single-rod telescopic mechanism; when the axial rod is composed of a long rod and a short rod hinged to the long rod, the long rod, the short rod, the first horizontal rod, the wheel, and the first slider form a double-rod telescopic mechanism.

[0024] During cam rotation: When the double-bar telescopic mechanism corresponds to the protruding part and the single-bar telescopic mechanism corresponds to the non-protruding part on the side of the cam wheel, both the double-bar and single-bar telescopic mechanisms are in the extended state. Slider 1 of the double-bar telescopic mechanism and slider 2 of the single-bar telescopic mechanism are at the lower end of the slide groove, and all doors are in the locked state. When the double-bar telescopic mechanism corresponds to the non-protruding part on the side of the cam wheel and the single-bar telescopic mechanism corresponds to the protruding part on the side of the cam wheel, both the double-bar and single-bar telescopic mechanisms are in the retracted state. Slider 1 of the double-bar telescopic mechanism and slider 2 of the single-bar telescopic mechanism are at the upper end of the slide groove, and all doors are in the unlocked state.

[0025] The synchronous switch device is used for a four-door cabinet. The cam is an elliptical wheel with the major axis of the elliptical wheel being L1, which corresponds to the two protrusions of the cam, and the minor axis being L2. There are two double-bar telescopic mechanisms and two single-bar telescopic mechanisms. The two double-bar telescopic mechanisms are arranged opposite each other, and the two single-bar telescopic mechanisms are arranged opposite each other.

[0026] When the cam moves to the point where L1 is collinear with the first horizontal rod, simultaneously L2 is collinear with the second horizontal rod. Both slider one and slider two are at the bottom of the slide groove, meaning all four doors are locked. L1 is positioned opposite to the two double-bar telescopic mechanisms, and L2 is positioned opposite to the two single-bar telescopic mechanisms. The horizontal rods of the two double-bar telescopic mechanisms move outward along the support, causing the long rod and short rod to pull slider one down the slide groove to the lower slide groove, locking the door panel corresponding to the double-bar telescopic mechanism. At the same time, the horizontal rods of the two single-bar telescopic mechanisms move inward along the support, causing the single rod to pull slider two down the slide groove to the lower slide groove, locking the door panel corresponding to the single-bar telescopic mechanism.

[0027] Conversely, when the cam moves to L2, it is positioned opposite to the two double-bar telescopic mechanisms, and L1 is positioned opposite to the two single-bar telescopic mechanisms. The horizontal bars of the two double-bar telescopic mechanisms move inward along the support, causing the long and short bars to pull the slider one upward along the slide groove to the upper slide groove, thus unlocking the door panel corresponding to the double-bar telescopic mechanism. At the same time, the horizontal bars of the two single-bar telescopic mechanisms move inward along the support, causing the single bar to pull the slider two upward along the slide groove to the lower slide groove, thus unlocking the door panel corresponding to the single-bar telescopic mechanism.

[0028] The projection of the cam onto a plane perpendicular to the axis of rotation is a rotationally symmetric figure with the axis of rotation as the center of rotation; the cam edge has a groove; the wheel edge has a flange that matches the groove; it also includes a drive device for driving the cam to rotate, the drive device being a miniature electric motor.

[0029] Compared to existing technologies, this technology allows for simultaneous opening and closing of all four door panels within a limited space, simplifying operation and eliminating the need for locking tongue slots, resulting in a simpler mechanical structure. When used on a standard toolbox, it allows for simultaneous opening of all four sides, making it easier and faster to find items in a toolbox with many different parts. When used on a protective cover, it allows for full opening of all four sides, replacing the previous structure that only allowed for a small pre-reserved maintenance opening, thus facilitating future maintenance operations. The structure is more optimized and eliminates the need for locking slots.

[0030] The synchronous switching device of the present invention changes the common door panel opening and closing method and opening and closing position. It does not require a slot for the lock tongue and can open and close four door panels simultaneously. Moreover, based on the present invention, the synchronous opening and closing of multiple door panels can be achieved. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the present invention (with the outer shell removed);

[0033] Figure 3 This is a schematic diagram of the invention (with the outer casing and miniature motor removed).

[0034] Figure 4 This is a schematic diagram of the unlocking mechanism of the present invention (with the outer casing and miniature motor removed).

[0035] Figure 5 This is a schematic diagram of the structure of the present invention when locked (with the outer shell and miniature motor removed).

[0036] Figure 6 This is a schematic diagram of the structure of the door panel (2) of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the cam (7) of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the double-bar telescopic mechanism (4) of the present invention;

[0039] Figure 9 This is a schematic diagram of the structure of the single-bar telescopic mechanism (6) of the present invention;

[0040] Figure 10 This is a structural schematic diagram of the cabinet (5) of the present invention;

[0041] Figure 11 This is a schematic diagram of the connection between the single-bar telescopic mechanism (6) and the cam (7) of the present invention;

[0042] Figure 12This is a schematic diagram of the structure of the single-bar telescopic mechanism (6) of the present invention in two extreme states;

[0043] Figure 13 This is a schematic diagram of the structure of the two limit states of the double-bar telescopic mechanism (4) of the present invention;

[0044] Figure 14 This is a schematic diagram of a traditional door structure;

[0045] Figure 15 This is a simplified calculation diagram of a single-bar telescopic mechanism (6);

[0046] Figure 16 This is a simplified calculation diagram of the double-bar telescopic mechanism (4);

[0047] Figure 17 This is a schematic diagram of an elliptical cam.

[0048] In the diagram: 1. Outer shell; 2. Door panel; 3. Miniature motor; 4. Double-bar telescopic mechanism; 5. Cabinet; 6. Single-bar telescopic mechanism; 7. Cam; 8. Slide groove; 9. Cam groove; 10. Support; 11. Wheel; 12. Horizontal bar one; 13. Pin; 14. Long bar; 15. Short bar; 16. Slider one; 17. Single bar; 18. Upper slide groove; 19. Horizontal bar two; 20. Slider two; 21. Lock; 22. Lock tongue; 23. Lock tongue slot; 24. Position one; 25. Position two; 26. Position three; 27. Position four. Detailed Implementation

[0049] like Figures 1-17 The multi-door cabinet equipped with a synchronous switch device of the present invention consists of an outer shell 1, a door panel 2, a micro motor 3, a double-rod telescopic mechanism 4, a single-rod telescopic mechanism 6, a cabinet body 5, and a cam 7.

[0050] The double-bar telescopic mechanism 4 is mainly composed of a support 10, a horizontal bar 12, a long bar 14, a short bar 15, a wheel 11, and a slider 16. The wheel 11 is connected to the horizontal bar 12 via a pin 13, the long bar 14 is rigidly connected to the horizontal bar 12, the short bar 15 is pin connected to the long bar 14, and the short bar 15 is pin connected to the slider 16.

[0051] The single-bar telescopic mechanism 6 is similar to the double-bar telescopic mechanism 4, wherein one end of the single bar 17 is connected to the horizontal bar 19 by a pin, and the other end is connected to the slider 20 by a pin.

[0052] The supports 10 of the single-bar telescopic mechanism 6 and the double-bar telescopic mechanism 4 are fixed together with the top plate of the cabinet 5.

[0053] The groove 9 of the cam fits into the wheel 11, ensuring that when the cam 7 rotates, the wheel 11 is always stuck in the groove 9 of the cam, and drives the horizontal rod 12 to slide back and forth in the inner hole of the support 10.

[0054] When the long axis L1 of the cam is parallel to the horizontal rod 12 of the double-bar telescopic mechanism 4, the sliders of both the double-bar telescopic mechanism 4 and the single-bar telescopic mechanism 6 slide into the lower groove 8 on the door plate, and the force of the rod prevents the door from opening.

[0055] When the long axis L1 of the cam is perpendicular to the horizontal rod 12 of the double-bar telescopic mechanism 4, that is, when the short axis L2 of the cam is parallel to the horizontal rod 12 of the double-bar telescopic mechanism 4, the sliders of both the double-bar telescopic mechanism 4 and the single-bar telescopic mechanism 6 slide into the upper sliding groove 18 on the cabinet, and the door can be opened.

[0056] Cam 7 is an elliptical wheel with a major axis of L1 corresponding to two protrusions and a minor axis of L2. The cam has a groove 9, and wheel 11 is engaged in the groove 9.

[0057] When the cam rotates, when the long shaft L1 is collinear with the horizontal rod 12, the horizontal rod 12 is at position 25. At the same time, the short shaft L2 is collinear with the horizontal rod 19, the horizontal rod 19 is at position 27. The slider 16 and slider 20 are both at the bottom, that is, the doors on all four sides are locked.

[0058] When the major axis L1 is collinear with the horizontal rod 12, the horizontal rod 12 is at position 25. Position 25 moves backward relative to position 124, that is, it extends relative to the axis of the cam shaft. At the same time, the minor axis L2 is collinear with the horizontal rod 19, and the horizontal rod 19 is at position 427. Position 427 moves forward relative to position 326, that is, it extends relative to the axis of the cam shaft.

[0059] Conversely, when the short shaft L2 is collinear with the horizontal rod 12, the horizontal rod 12 is at position 24. Position 24 moves forward relative to position 25, that is, it performs a telescoping motion relative to the cam shaft axis. At the same time, the long shaft L1 is collinear with the horizontal rod 19, and the horizontal rod 19 is at position 26. Position 26 moves backward relative to position 27, that is, it performs an extending motion relative to the cam shaft axis.

[0060] The length ratio calculation of each rod in this invention is as follows:

[0061] Now, assuming that the major axis L1 is collinear with horizontal bar 12, then the minor axis L2 is collinear with horizontal bar 29. Under this condition, the length ratio is calculated.

[0062] like Figure 15 The two limit states of the double-bar telescopic mechanism 4 are drawn, where, according to the structure, we can obtain...

[0063] 1. EF = L1 - L2

[0064] Explanation: Points E and F represent two extreme states of horizontal rod 12. One extreme state is when the major axis L1 is collinear with horizontal rod 12, and the other extreme state is when the minor axis L2 is collinear with horizontal rod 12. Since horizontal rod 12 undergoes horizontal displacement, the length of EF is equal to the length of the major axis minus the length of the minor axis, i.e., L1 - L2.

[0065] Similarly, points M and K represent two extreme states of slider 16. One extreme state is when the major axis L1 is collinear with the horizontal rod 12, and the other extreme state is when the minor axis L2 is collinear with the horizontal rod 12, and slider 16 undergoes vertical displacement. Therefore, let MK = S.

[0066] Since the length of the long rod 14 is fixed and it moves horizontally with the horizontal rod 12, EF = HG = L1 - L2

[0067] Since the length of the short rod 15 is fixed, MH = KG = h

[0068] Draw auxiliary lines and extend GH and MK to intersect at point Q. This forms two right triangles, △MHQ and △GKQ, where FH intersects KG at point N.

[0069] Since MQ∥HN, MK=HN=S. According to the principle of similar triangles, we have:

[0070] GH / GQ=NH / MQ, which gives S / n=(L1-L2) / (L1-L2+C) ………①

[0071] Additionally (S+n) 2 +C 2 = h 2 ………②

[0072] (C + L1-L2) 2 + n 2 = h 2 ………③

[0073] Similarly, Figure 16 The two limit states of the single-bar telescopic mechanism 6 are drawn. Auxiliary lines are drawn and extended to intersect at point P, forming two right triangles △ADP and △BCP.

[0074] Since the single-bar telescopic mechanism 6 and the double-bar telescopic mechanism 4 move simultaneously with the cam 7, AP=JF=C, AB=EF=L1-L2, CD=KQ=S, PC=JM=a, and in the single-bar telescopic mechanism 6, AD=BC=m.

[0075] The following formula is obtained:

[0076] (C + L1-L2) 2 +a 2=m 2 ………④

[0077] C 2 +(a+S) 2 =m 2 ………⑤

[0078] FH = a + S + n………⑥

[0079] Following the general mechanical design sequence, we first provide a design input, so we first give values ​​S, L1-L2, and C. This will result in five unknown values: n, h, a, m, and FH. Now we have six equations: ①②③④⑤⑥. Therefore, we can calculate four unknowns based on the five equations.

[0080] The above are the dimensions of the mechanism.

Claims

1. A synchronous switching device, characterized in that: It includes a rotatable cam (7), with a rotating shaft in the middle of the cam (7). The cam wheel has a protruding part and a non-protruding part on its side. It also includes a telescopic mechanism for transmitting the cam motion. The telescopic mechanism includes a wheel (11) set close to the edge of the cam and a linkage mechanism connected to the wheel (11). A slider mounted at the end of the linkage mechanism can slide freely along the slide groove. The sliding direction of the slider in the slide groove is parallel to the axis of the cam rotating shaft. The linkage mechanism includes a horizontal rod that moves freely along the radial direction of the cam and an axial rod that is set along the plane of the cam shaft axis. The horizontal rod is freely mounted on the support (10). The horizontal rod includes a horizontal rod one (12) and a horizontal rod two (19). The slider includes a slider one (16) and a slider two (20). When the axial rod is a single rod (17), one end of the single rod (17) is connected to the horizontal rod two (19), and the other end of the single rod (17) is hinged to the slider two (20). When the axial rod is composed of a long rod (14) and a short rod (15) hinged to the long rod, the long rod (14) is rigidly connected to the horizontal rod one (12), and the short rod (15) is hinged to the slider one (16). When the axial rod is a single rod (17), the single rod (17), the second horizontal rod (19), the wheel (11), and the second slider (20) form a single rod telescopic mechanism (6); when the axial rod is composed of a long rod (14) and a short rod (15) hinged to the long rod, the long rod (14), the short rod (15), the first horizontal rod (12), the wheel (11), and the first slider (16) form a double rod telescopic mechanism (4). During cam rotation: when the double-bar telescopic mechanism (4) and the single-bar telescopic mechanism (6) are in the extended state, the slider one (16) of the double-bar telescopic mechanism (4) and the slider two (20) of the single-bar telescopic mechanism (6) are at the lower end of the groove; when the double-bar telescopic mechanism (4) and the single-bar telescopic mechanism (6) are in the retracted state, the slider one (16) of the double-bar telescopic mechanism (4) and the slider two (20) of the single-bar telescopic mechanism (6) are at the upper end of the groove. The projection of the cam onto a plane perpendicular to the axis of rotation is a rotationally symmetric figure with the axis of rotation as the center of rotation; the edge of the cam has a groove (9); the edge of the wheel (11) has a flange that matches the groove (9); When the double-bar telescopic mechanism (4) corresponds to the protrusion and the single-bar telescopic mechanism (6) corresponds to the non-protrusion on the side of the cam wheel, the double-bar telescopic mechanism (4) and the single-bar telescopic mechanism (6) are in the extended state, and the slider one (16) of the double-bar telescopic mechanism (4) and the slider two (20) of the single-bar telescopic mechanism (6) are at the lower end of the groove; when the double-bar telescopic mechanism (4) corresponds to the non-protrusion on the side of the cam wheel and the single-bar telescopic mechanism (6) corresponds to the protrusion on the side of the cam wheel, the double-bar telescopic mechanism (4) and the single-bar telescopic mechanism (6) are in the retracted state, and the slider one (16) of the double-bar telescopic mechanism (4) and the slider two (20) of the single-bar telescopic mechanism (6) are at the upper end of the groove; When the synchronous switch device is used in a four-door cabinet: there are two double-rod telescopic mechanisms (4) and two single-rod telescopic mechanisms (6), with the two double-rod telescopic mechanisms (4) arranged opposite each other and the two single-rod telescopic mechanisms (6) arranged opposite each other; the cam (7) is an elliptical wheel with the major axis of the elliptical wheel being L1 and the minor axis being L2, and a groove (9) around the edge of the cam, with the wheel (11) being inserted into the groove (9) of the cam; When the cam rotates: when the long shaft L1 is collinear with the horizontal rod one (12), at the same time the short shaft L2 is collinear with the horizontal rod two (19), and both slider one (16) and slider two (20) are at the bottom of the groove, that is, the four doors of the four-door cabinet are locked. When the short axis L2 is collinear with the horizontal bar 1 (12), at the same time the long axis L1 is collinear with the horizontal bar 2 (19), and both slider 1 (16) and slider 2 (20) are at the highest point of the slide groove, that is, all four doors of the four-door cabinet are in the unlocked state.

2. The synchronous switching device according to claim 1, characterized in that: It also includes a drive device for rotating the cam (7), the drive device being a micro motor (3).

3. A multi-door cabinet, characterized in that: The cabinet includes a top plate at the top and multiple door panels (2) on the sides. It also includes a synchronous switch device for synchronously locking / unlocking the door panels as described in claim 1 or 2. The door panels have a sliding groove (8), and the top plate has an upper sliding groove (18) corresponding to the sliding groove. The upper and lower sliding grooves form a complete sliding groove that cooperates with the slider. The support (10) is fixed to the top plate.

4. The multi-door cabinet according to claim 3, characterized in that: The synchronous switching device is covered by a housing (1).

5. The multi-door cabinet according to claim 4, characterized in that: The top plate has a support column underneath, and each side of the cabinet is composed of two door panels (2). The outer side of each door panel (2) is hinged to the support column, and a lower half slide groove (8) is provided on the inner side of each door panel. When the two door panels are closed, the two lower half slide grooves are joined together to form a lower slide groove.

6. A method for synchronous opening and closing of multiple doors in a space-constrained multi-door cabinet, characterized in that: A synchronous switch device is installed on the top plate of the cabinet. The synchronous switch device includes a cam (7), a rotating shaft is installed in the middle of the cam (7), and the side of the cam wheel has a protruding part and a non-protruding part; it also includes a telescopic mechanism for transmitting the cam motion. The telescopic mechanism includes a wheel (11) set close to the edge of the cam and a linkage mechanism connected to the wheel (11). The slider installed at the end of the linkage mechanism can slide freely along the slide groove; the sliding direction of the slider in the slide groove is parallel to the axis of the cam rotating shaft. The linkage mechanism includes a horizontal rod that moves freely along the radial direction of the cam and an axial rod that is set along the plane of the cam shaft axis. The horizontal rod is freely mounted on the support (10). The horizontal rod includes a horizontal rod one (12) and a horizontal rod two (19). The slider includes a slider one (16) and a slider two (20). When the axial rod is a single rod (17), one end of the single rod (17) is connected to the horizontal rod two (19), and the other end of the single rod (17) is hinged to the slider two (20). When the axial rod is composed of a long rod (14) and a short rod (15) hinged to the long rod, the long rod (14) is rigidly connected to the horizontal rod one (12), and the short rod (15) is hinged to the slider one (16). The cabinet has a sliding groove on the side door panel (2) and an upper sliding groove (18) on the top panel corresponding to the sliding groove. When the cam rotates, the cam (7) transmits motion to the wheel, the wheel transmits motion to the horizontal bar, and the horizontal bar, which is freely mounted on the support (10), moves telescopically. When the axial rod is a single rod (17), the single rod (17), the second horizontal rod (19), the wheel (11), and the second slider (20) form a single rod telescopic mechanism (6); when the axial rod is composed of a long rod (14) and a short rod (15) hinged to the long rod, the long rod (14), the short rod (15), the first horizontal rod (12), the wheel (11), and the first slider (16) form a double rod telescopic mechanism (4). During cam rotation: When the double-bar telescopic mechanism (4) corresponds to the protrusion and the single-bar telescopic mechanism (6) corresponds to the non-protrusion on the side of the cam wheel, the double-bar telescopic mechanism (4) and the single-bar telescopic mechanism (6) are in the extended state, the slider one (16) of the double-bar telescopic mechanism (4) and the slider two (20) of the single-bar telescopic mechanism (6) are at the lower end of the groove, and all the multi-faceted doors are in the locked state; when the double-bar telescopic mechanism (4) corresponds to the non-protrusion on the side of the cam wheel and the single-bar telescopic mechanism (6) corresponds to the protrusion on the side of the cam wheel, the double-bar telescopic mechanism (4) and the single-bar telescopic mechanism (6) are in the retracted state, the slider one (16) of the double-bar telescopic mechanism (4) and the slider two (20) of the single-bar telescopic mechanism (6) are at the upper end of the groove, and all the multi-faceted doors are in the unlocked state.

7. The method for synchronous opening and closing of multiple doors in a space-constrained multi-door cabinet according to claim 6, characterized in that: The synchronous switch device is used for a four-door cabinet. The cam (7) is an elliptical wheel with the major axis of the elliptical wheel being L1 and the minor axis being L2. There are two double-rod telescopic mechanisms (4) and two single-rod telescopic mechanisms (6). The two double-rod telescopic mechanisms (4) are arranged opposite to each other, and the two single-rod telescopic mechanisms (6) are arranged opposite to each other. When the cam (7) moves to the point where L1 is collinear with the horizontal rod (12), at the same time L2 is collinear with the horizontal rod (19), and both sliders (16) and (20) are at the bottom of the slide groove, that is, the doors on all four sides are locked. L1 is set opposite to the two double-rod telescopic mechanisms (4), and L2 is set opposite to the two single-rod telescopic mechanisms (6). The horizontal rods of the two double-rod telescopic mechanisms (4) move outward along the support (10) to drive the long rod (14) and the short rod (15) to pull the slider (16) down along the slide groove to the lower slide groove, and the door panel corresponding to the double-rod telescopic mechanism (4) is locked. At the same time, the horizontal rods of the two single-rod telescopic mechanisms (6) move inward along the support (10) to drive the single rod (17) to pull the slider (20) down along the slide groove to the lower slide groove, and the door panel corresponding to the single-rod telescopic mechanism (6) is locked. Conversely, when the cam (7) moves to the point where L2 is collinear with the horizontal rod (19), L2 is positioned opposite to the two double-bar telescopic mechanisms (4), and L1 is positioned opposite to the two single-bar telescopic mechanisms (6). The horizontal rods of the two double-bar telescopic mechanisms (4) move inward along the support (10), causing the long rod (14) and short rod (15) to pull the slider (16) upward along the slide groove to the upper slide groove, and the door panel corresponding to the double-bar telescopic mechanism (4) is in the unlocked state; at the same time, the horizontal rods of the two single-bar telescopic mechanisms (6) move inward along the support (10), causing the single rod (17) to pull the slider (20) upward along the slide groove to the lower slide groove, and the door panel corresponding to the single-bar telescopic mechanism (6) is in the unlocked state.

8. The method for synchronous opening and closing of multiple doors in a space-constrained multi-door cabinet according to claim 6, characterized in that: The projection of the cam on a plane perpendicular to the axis of rotation is a rotationally symmetric figure with the axis of rotation as the center of rotation; the edge of the cam has a groove (9); the edge of the wheel (11) has a flange that matches the groove (9); it also includes a drive device for driving the cam (7) to rotate, the drive device being a micro motor (3).

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