A locking device

Abstract

The present invention discloses a method of forming a tail threaded hole in the tail slider, wherein the threaded end of the screw passes through the first slider hole and the middle slider hole in sequence and is screwed into the tail threaded hole. From then on, the entire locking device does not need to pass the screw through the body, and the locking device is self-contained. During disassembly, all parts of the locking device can be removed together by simply loosening the screw, thus preventing the entire locking device from becoming multiple separate parts that require the cooperation of multiple people or prevent the parts from falling, making disassembly convenient and quick. Furthermore, an auxiliary slider is included. By adding the auxiliary slider, the length of the locking device is lengthened, which can adapt to the fixation of circuit boards of different lengths.

Description

Technical Field

[0001] The present invention relates to the technical field of lockers, and in particular to a locker with a quick disassembly function. Background Art

[0002] A circuit board locker, also known as a circuit board locking strip or wedge-shaped circuit board locking device, is installed on the edge of a circuit board. It changes its thickness or width by applying pressure to tighten the gap between the circuit board and the chassis board or the side wall of the chassis circuit board slot, thereby firmly connecting the circuit board to the chassis board or the side wall of the chassis circuit board slot. This greatly facilitates disassembly and is an indispensable accessory for modular systems. However, existing circuit board lockers have a simple structure, cannot be stably adjusted and fixed according to different thicknesses, and have poor grounding and environmental adaptability. In order to solve the above technical problems, Chinese patent document CN20751902U discloses a guide rail locker for loosening and tightening chassis circuit boards, including a screw rod, a middle slider is provided on the screw rod, a left slider is provided on one side of the middle slider, and the left slider is provided on the screw rod, a flat washer is connected to one side of the left slider, and the screw rod passes through the flat washer, a right slider is provided on the other side of the middle slider, and the right slider is provided on the screw rod, a limiting groove is provided on one side of the right slider, a coil compression spring is provided in the limiting groove, a limiting screw sleeve is provided on the screw rod, and one end of the limiting screw sleeve is in conflict with one end of the coil compression spring, and a nut is provided on the screw rod. The relative position is adjusted by the limiting screw sleeve, and the nut is used to fix the locker to the body. When working, the left and right sliders are driven to move to both ends or to the middle at the same time by rotating the screw, so as to change the up and down position of the middle slider to complete the locking and loosening of the circuit board in the slot. When rotating right, the left and right sliders move to the middle at the same time, and the position of the middle slider moves up, which is a locked state, and vice versa, it is a loose state. This technical solution summarizes the installation characteristics of the internal system of the chassis in my country's military, aviation, shipbuilding and other industries, and is designed and developed by fully drawing on the advantages of related products. The fastening part adopts a spring structure, which can automatically respond in the free state, has excellent grounding and environmental adaptability, is convenient to adjust and stably fix, and has been widely used in military, aerospace, shipbuilding and other fields. Although the above structure effectively solves the problems of grounding and environmental adaptability, when the circuit board needs to be replaced or disassembled, the locker needs to be removed first. Since the locker is fixed to the body by a nut, when the locker is disassembled, when the nut is loosened, the locker will be divided into multiple parts from the whole body, requiring the cooperation of multiple people, or the falling parts may easily damage other components in the body, making disassembly very inconvenient. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a locking device, which includes a screw, a first slider, a tail slider and an intermediate slider. A first slider hole is formed on the first slider, an intermediate slider hole is formed on the intermediate slider, and a tail threaded hole is formed on the tail slider. The threaded end of the screw passes through the first slider hole and the intermediate slider hole in sequence and is screwed into the tail threaded hole; during the rotation of the screw, the first slider and the intermediate slider slide obliquely and offset, and the intermediate slider and the tail slider slide obliquely and offset, so that the two sides of the locking device squeeze the circuit board and the side walls of the circuit board slot.

[0004] Furthermore, the invention further comprises an auxiliary slider, wherein the auxiliary slider forms an auxiliary slider hole, and the screw rod passes through the auxiliary slider hole; the auxiliary slider is located between the first slider and the middle slider and / or between the middle slider and the tail slider. After the auxiliary slider is installed, the sliders at both ends of the auxiliary slider squeeze it to cause the auxiliary slider to slide in an oblique and dislocated manner.

[0005] Furthermore, the screw is provided with a snap-fit ​​structure that cooperates with the first slider hole. When the locker is disassembled, the screw is rotated so that the snap-fit ​​structure cooperates with the first slider hole to drive the first slider to move along the length direction of the screw.

[0006] Furthermore, the first slider hole is set to two sections, and the diameter of one section close to the nut of the screw or the diameter of its circumscribed circle is smaller than the diameter of the other section or the diameter of its circumscribed circle; an annular groove is formed on the screw, and a notched ring is installed on the annular groove, and the circumferential surface of the notched ring is higher than the circumferential surface of the screw; when the locker is disassembled, the screw is rotated so that the notched ring is stuck in the diameter change part of the first slider hole, driving the first slider to move along the length direction of the screw.

[0007] Furthermore, a fixing hole is provided on the middle slider, and the middle slider is fixed on the circuit board through the fixing hole.

[0008] Furthermore, the auxiliary slider hole in a portion of the auxiliary slider close to the primary slider is enlarged.

[0009] Furthermore, a gasket is provided between the nut and the first slider.

[0010] Furthermore, at least one of the first slider, the middle slider, the tail slider and the auxiliary slider is provided with a weight-reducing hole.

[0011] The above technical solution of the present invention has the following advantages over the prior art:

[0012] (1) The locking device of the present invention forms a tail threaded hole in the tail slider, and the threaded end of the screw passes through the first slider hole and the middle slider hole in sequence and is screwed into the tail threaded hole. From then on, the locking device as a whole does not need to pass the screw through the body, and the locking device is self-contained. When disassembling, all the parts of the locking device can be removed together by loosening the screw, avoiding the locking device as a whole from becoming multiple separate parts, requiring the cooperation of multiple people, or avoiding the separate parts from falling, and making disassembly convenient and quick. Furthermore, it also includes an auxiliary slider. By adding the auxiliary slider, the length of the locking device is lengthened, which can adapt to the fixation of circuit boards of different lengths.

[0013] (2) The locking device of the present invention is provided with a snap-fit ​​structure on the screw rod that cooperates with the first slider hole. When the locking device is disassembled, the screw rod is rotated so that the snap-fit ​​structure cooperates with the first slider hole to drive the first slider to move along the length direction of the screw rod. The adoption of this structure can solve the problem of disassembling the locking device that is not fixed through the body. The disassembly problem is as follows: when the circuit board needs to be replaced, after loosening the screw rod, no slider is loosened, and all are in a stuck state. The locking device and the side wall of the circuit board slot are still in close contact, and the circuit board cannot be directly disassembled by hand; and during the disassembly process, due to excessive force or improper use of tools, it is easy to generate certain lateral stress on the circuit board or the circuit board connector, which will cause deformation of the circuit board, poor soldering of components, bending of connector pins, etc., resulting in product failure or quality risks. By providing a locking mechanism that cooperates with the hole of the primary slider, when the screw is loosened, the force between the primary slider and the auxiliary slider disappears instantly when the primary slider is driven to slide along the length of the screw. At the same time, the force between the adjacent sliders of the locker also disappears instantly, or in other words, the inclined surfaces of the sliders release the force instantly after being squeezed (caused by the vibration transmission caused by the instantaneous separation between the primary slider and the auxiliary slider). As a result, the sliders of the locker are loosened, thereby avoiding the use of additional tools or excessive force during disassembly to cause damage to the circuit board. Furthermore, an annular groove is formed at the corresponding position of the screw, and a circular ring with a notch is installed in the annular groove, that is, the corresponding position of the screw is enlarged in a disguised manner. At the same time, the hole of the primary slider is enlarged a section so that the circular ring can be stuck after entering the hole of the primary slider after the screw is loosened, thereby driving the primary slider to separate from the auxiliary slider or the intermediate slider, and then all the sliders of the locker are loosened instantly. This structure is simple to operate, easy to install, and convenient and quick to disassemble.

[0014] (3) The locking device of the present invention has a fixing hole on the middle slider, through which the middle slider is fixed on the circuit board, so that the locking device and the circuit board are integrated. When the circuit board is positioned, the locking device is positioned at the same time. At this time, the screw is tightened to make the slider squeeze the circuit board and the side wall of the circuit board slot respectively. The structure is simple, the operation is convenient, and it saves time and effort.

[0015] (4) In the locking device of the present invention, the hole of the auxiliary slider in the part of the auxiliary slider close to the primary slider is enlarged so that a circular ring can be set in the holes in the primary slider and the auxiliary slider, thereby preventing the circular ring from affecting the fit between the primary slider and the auxiliary slider.

[0016] (5) The locker of the present invention reduces the overall weight of the locker by providing a weight-reducing hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following is a brief introduction to the drawings required for use in the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the locking device of the present invention;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 It is a schematic cross-sectional view of the locking device of the present invention;

[0021] Figure 4 This is a schematic structural diagram of the locking device of the present invention after the screw is tightened;

[0022] Figure 5 This is a diagram of the locking device of the present invention in use;

[0023] The reference numerals in the figure are as follows: 1-screw; 2-first slider; 3-tail slider; 4-middle slider; 5-auxiliary slider; 6-annular groove; 7-notched ring; 8-fixing hole; 9-weight reduction hole; 10-gasket; 11-circuit board; 12-circuit board slot; 13-nut; 21-first slider hole; 31-tail threaded hole; 41-middle slider hole; 51-auxiliary slider hole. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the present invention in conjunction with the accompanying drawings. It is obvious that the embodiments described are only some of the embodiments of the present invention, not all of them. The embodiments of the present invention and other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0026] In the description of this invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this invention.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Example 1

[0029] like Figure 1-5 As shown, this embodiment discloses a locking device, which includes a screw 1, a first slider 2, a tail slider 3 and an intermediate slider 4. The screw 1 is selected to have a long strip structure with a nut 13, and the other end away from the nut 13 is a threaded end. The shapes of the first slider 2, the tail slider 3 and the intermediate slider 4 are selected from existing slider shapes, generally wedge-shaped. Specifically, the first slider 2 and the tail slider 3 are right-angled trapezoidal structures, and the intermediate slider 4 is an isosceles trapezoidal structure; a first slider hole 21 is formed on the first slider 2, a tail threaded hole 31 is formed on the tail slider 3, and an intermediate slider hole 41 is formed on the intermediate slider. The threaded end of the screw 1 passes through the first slider 2 in sequence. The first slider hole 21 and the middle slider hole 41 are then screwed into the tail threaded hole 31, and the tail threaded hole 31 is a through hole; during the rotation of the screw 1, or during the screwing of the screw 1, the first slider 2 and the middle slider 4 slide obliquely and offset, and in this embodiment, slide along the trapezoidal inclined surface, and the middle slider 4 and the tail slider 3 slide obliquely and offset, and in this embodiment, slide along the trapezoidal inclined surface, so that the two sides of the locking device pressurize the circuit board 11 and the side walls of the circuit board slot 12, thereby squeezing the circuit board to the other side wall of the circuit board slot 12, and then fixing the circuit board 11. Generally, two sets of locking devices are usually used to fix the circuit board 11.

[0030] Furthermore, in order to make the locker adapt to circuit boards 11 of different lengths or widths, an auxiliary slider 5 is also included. The auxiliary slider selects an existing slider shape, generally a wedge shape. Specifically, the auxiliary slider 5 is an isosceles trapezoidal structure; the auxiliary slider 5 forms an auxiliary slider hole 51, and the screw 1 passes through the auxiliary slider hole 51; as for the position setting of the auxiliary slider 5, it can be set between the first slider 2 and the middle slider 4, or between the middle slider 4 and the tail slider 3, or at both positions. As for the number, it can be adjusted according to the size of the specific slider or the required length of the locker or the installation position. In this embodiment, one auxiliary slider 5 is set at each of the two positions.

[0031] Furthermore, in order to quickly disassemble the locker and the circuit board, especially when the screw 1 is loosened, the sliders still maintain the state of squeezing and fixing the circuit board, resulting in the problem that the circuit board cannot be removed, the screw 1 is provided with a snap-fit ​​structure that cooperates with the first slider hole 21. When the locker is disassembled, the screw 1 is rotated so that the snap-fit ​​structure cooperates with the first slider hole 21 to drive the first slider 2 to move along the length direction of the screw 1. That is, the moment the snap-fit ​​mechanism drives the first slider 2 to move along the length direction of the screw 1, the stress between the sliders is released, and then the sliders no longer maintain the force to fix the circuit board, thereby loosening the locker, removing the locker, and then removing the circuit board. Specifically, the first slider hole 21 is set to two sections, and the diameter of one section close to the nut 13 of the screw 1 or the diameter of its circumscribed circle is smaller than the diameter of the other section or the diameter of its circumscribed circle. In this embodiment, the first slider hole 21 is a circular hole with two sections of different diameters; at the same time, an annular groove 6 is formed on the screw 1, and a notched ring 7 is installed on the annular groove 6. The circumferential surface of the notched ring 7 is higher than the circumferential surface of the screw 1. At the same time, the installed diameter of the notched ring 7 is between the two diameters of the first slider hole 21; when the locker is disassembled, the screw 1 is rotated so that the notched ring 7 is stuck in the diameter change part of the first slider hole 21, driving the first slider 2 to move along the length direction of the screw 1.

[0032] Furthermore, a fixing hole 8 is provided on the middle slider 4 , and the middle slider 4 is fixed to the circuit board 11 through the fixing hole 8 . In this embodiment, the middle slider 4 is fixed to the circuit board 11 by screwing a screw into the fixing hole 8 .

[0033] Furthermore, the auxiliary slider hole 51 of the auxiliary slider 5 close to the primary slider 2 is enlarged. The method of the enlargement is not specifically limited. It can be fully enlarged along the side wall of the hole, or partially enlarged along the side wall of the hole, depending on the specific setting of the notch ring 7 structure.

[0034] Furthermore, a gasket 10 is provided between the nut 13 and the first slider 2 . The gasket 10 is not specifically limited and may be a flat gasket or a spring gasket.

[0035] Furthermore, at least one of the first slider 2 , the middle slider 4 , the tail slider 3 and the auxiliary slider 5 is provided with a weight-reducing hole 9 . In this embodiment, the middle slider 4 is selected for the setting.

[0036] The use process of the present invention is as follows:

[0037] During installation, first insert the gasket into the screw nut, then insert the first slider into the screw to the gasket, then install the notched ring into the annular groove; then insert the auxiliary slider into the screw to the first slider; pass the screw thread section through the middle slider; insert the auxiliary slider into the screw to the middle slider, then thread the tail slider into the screw thread end, and then fix the middle slider to the circuit board. Finally, install the circuit board with the lock into the circuit board slot 12 (the position can be referred to Figure 5 ), after positioning the circuit board, turn the screw to widen the locker to squeeze the circuit board and the side wall of the circuit board slot to fix the circuit board; when disassembling, hold or temporarily fix the circuit board by hand, loosen the screw, and at the moment when the notched ring drives the first slider to move along the length direction of the screw, the stress between all the sliders is released, the slider is loosened, and the circuit board and the locker can be removed together.

[0038] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A locking device, characterized in that: The cam is threaded into the slotted hole of the first slider and the middle slider is threaded into the slotted hole of the tail slider; the cam is threaded into the slotted hole of the first slider and the middle slider in turn, so that the cam and the middle slider can slide in a staggered manner, and the middle slider and the tail slider can slide in a staggered manner so that the two sides of the locker squeeze the circuit board and the side wall of the circuit board slot; the first slider hole is set to two sections, and the diameter of the nut of the screw or the diameter of its circumscribed circle is smaller than the diameter of the other section or the diameter of its circumscribed circle; an annular groove is formed on the screw, and a notched ring is installed on the annular groove, and the circumferential surface of the notched ring is higher than the circumferential surface of the screw; when the locker is disassembled, the screw is rotated so that the notched ring is stuck at the diameter change position of the first slider hole, driving the first slider to move along the length direction of the screw.

2. The locking device according to claim 1, characterized in that: It also includes an auxiliary slider, which forms an auxiliary slider hole, and the screw passes through the auxiliary slider hole; the auxiliary slider is located between the first slider and the middle slider and / or the middle slider and the tail slider.

3. The locking device according to claim 2, characterized in that The middle slider is provided with a fixing hole, through which the middle slider is fixed on the circuit board.

4. The locking device according to claim 3, characterized in that The hole of the auxiliary slider near the primary slider is enlarged.

5. The locking device according to claim 4, characterized in that , a gasket is provided between the nut and the first slider.

6. The locking device according to claim 5, characterized in that At least one of the first slider, the middle slider, the tail slider and the auxiliary slider is provided with a weight-reducing hole.

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