A sliding connection device

Abstract

This utility model discloses a sliding connection device, characterized in that it comprises: a movable frame; two swing frames, spaced apart in the front-rear direction, each swing frame being pivotally connected to the movable frame, the two swing frames swinging synchronously in a controlled manner, and capable of sequentially changing between a forward tilting state, a longitudinally extending state, and a backward tilting state; and a swing state control mechanism, mounted on the movable frame, capable of switching between a swing-allowed state and a swing-resisting state, wherein the swing state control mechanism allows the two swing frames to swing synchronously when in the swing-allowed state, and hinders the synchronous swinging of the two swing frames when in the swing-resisting state. The sliding connection device of this application is suitable for installation between the main frame and the auxiliary frame of a telescopic bed frame, allowing the auxiliary frame to move relative to the main frame in the front-rear direction.

Description

Technical Field

[0001] This utility model relates to connecting device technology, specifically, to a sliding connecting device. Background Technology

[0002] Patent application CN203988851U discloses a retractable massage bed frame, which includes a leg extension frame that can move relative to the bed frame support to adjust the length of the bed frame. A shortcoming of the aforementioned patent application is that the leg extension frame experiences significant frictional resistance when moving relative to the bed frame support. Therefore, this application is filed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a sliding connection device that can be applied to telescopic bed frames to solve the problem of large frictional resistance when the leg telescopic frame moves relative to the bed support frame in existing bed frames.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a sliding connection device, characterized in that it comprises: a movable frame; two swing frames, spaced apart in the front-rear direction, and each swing frame is pivotally connected to the movable frame, the two swing frames swing synchronously in a controlled manner, and can sequentially change between a forward tilting state, a longitudinally extending state, and a backward tilting state; a swing state control mechanism, installed on the movable frame, and capable of switching between a swing-allowed state and a swing-impeded state, wherein when the swing state control mechanism is in the swing-allowed state, it allows the two swing frames to swing synchronously, and when it is in the swing-impeded state, it impedes the two swing frames from swinging synchronously.

[0005] Preferably, the swing state control mechanism includes two adjustment components, each corresponding to one of the two swing frames; wherein the adjustment component located at the front is controlled by a front trigger and switches between a first state that allows the swing frame located at the front to swing forward and a second state that prevents the swing frame located at the front from swinging forward; wherein the adjustment component located at the rear is controlled by a rear trigger and switches between a first state that allows the swing frame located at the rear to swing backward and a second state that prevents the swing frame located at the rear from swinging backward.

[0006] Preferably, both adjustment components include a movable member and an elastic member, the movable member being capable of moving back and forth within a set range relative to the movable frame to switch between a position that hinders the swing of the swing frame and a position that allows the swing of the swing frame to swing; wherein the elastic member of the adjustment component located on the front side applies an elastic force to its movable member to maintain its forward movement tendency; wherein the elastic member of the adjustment component located on the rear side applies an elastic force to its movable member to maintain its backward movement tendency.

[0007] Preferably, the movable frame is equipped with two roller assemblies, and the two roller assemblies correspond to the two swing frames respectively. The rotation center of each swing frame relative to the movable frame coincides with the rotation center of the corresponding roller assembly.

[0008] Preferably, the movable frame is equipped with two roller assemblies, and the two roller assemblies correspond to the two adjustment assemblies respectively. The moving part of each adjustment assembly slides in the front-back direction with the rotation center of the corresponding roller assembly.

[0009] Preferably, the swing frame includes two swing arms spaced apart from each other on the left and right, and a connecting rod located between the two swing arms; the swing arms are pivotally connected to the movable frame.

[0010] Preferably, the movable member includes a first mating part that engages with the swing frame and a second mating part that engages with the elastic member (3F). The elastic member is a telescopic spring sleeved on the second mating part, and the two sides of the elastic member (3F) abut against the first mating part and the movable frame, respectively.

[0011] Preferably, the movable frame has a rear slot. When the rear trigger is inserted into the rear slot, it will push the moving part of the adjustment assembly located on the rear side, causing the elastic part of the adjustment assembly located on the rear side to elastically contract.

[0012] Preferably, the movable frame has a front slot. When the front trigger is inserted into the front slot, it will push the moving part of the adjustment assembly located on the front side, causing the elastic part of the adjustment assembly located on the front side to elastically contract.

[0013] Due to the adoption of the above technical solutions, this utility model has the following beneficial effects: The sliding connection device of this application is suitable for installation between the main frame and the auxiliary frame of the telescopic bed frame, and enables the auxiliary frame to move relative to the main frame in the front-back direction. The swing frame of the sliding connection device is controlled by the swing state control mechanism to switch the swing state of the swing frame, thereby controlling whether the swing frame can swing. By adjusting the swing state of the swing frame, the gap between the auxiliary frame and the main frame in the vertical direction can be adjusted, which helps to reduce the frictional resistance experienced by the auxiliary frame during the front-back sliding process. The solution of this application enriches the design ideas of the bed frame. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0015] Figure 1 and Figure 2Schematic diagrams of an embodiment of a retractable bed frame are shown from different perspectives;

[0016] Figure 3 A first exploded view of an embodiment of a retractable bed frame is shown;

[0017] Figure 4 A second exploded view of an embodiment of a retractable bed frame is shown;

[0018] Figure 5 A third exploded view of an embodiment of a retractable bed frame is shown;

[0019] Figure 6 A fourth exploded view of an embodiment of a retractable bed frame is shown;

[0020] Figure 7 A schematic diagram of the auxiliary frame of a retractable bed frame according to one embodiment is shown;

[0021] Figure 8 A schematic diagram of a sliding connection device for a retractable bed frame according to one embodiment is shown;

[0022] Figure 9 A first exploded view of a sliding connection device for a retractable bed frame according to an embodiment is shown;

[0023] Figure 10 A second exploded view of a sliding connection device for a retractable bed frame according to one embodiment is shown;

[0024] Figure 11 A third exploded view illustrates a sliding connection device for a retractable bed frame according to one embodiment;

[0025] Figure 12 A diagram illustrating the front-to-back movement of the auxiliary frame relative to the main frame is shown in one embodiment of a retractable bed frame.

[0026] Figure 13 The diagram illustrates the state changes of the sliding connection device as the auxiliary frame moves from front to back relative to the main frame.

[0027] Figure label:

[0028] Main frame 1, first frame 1A, second frame 1B, interlocking block 1C, third frame 1D, auxiliary frame 2, sliding connection part 2A, support part 2B, longitudinal connection part 2C, front pivot part 2D, rear pivot part 2E, sliding connection device 3, movable frame 3A, rotating shaft 3B, roller 3C, swing frame 3D, moving part 3E, elastic part 3F, adjusting assembly 3G, swing state control mechanism 3H, roller assembly 3I, mounting port G, rear groove K1, front groove K2, first displacement segment L1, second displacement segment L2, third displacement segment L3, swing rod M1, first mating part N1, first plate part N11, second plate part N12, third plate part N13, fourth plate part N14, elongated hole N15, second mating part N2, connecting rod M2, rack P, side plate Q1, partition plate Q2, bottom plate Q3, front triggering part T1, rear triggering part T2, sliding groove W. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0031] Combination Figures 1 to 13 In one embodiment, the retractable bed frame of this application includes a main frame 1, an auxiliary frame 2, and a sliding connection device 3. The sliding connection device 3 is located between the main frame 1 and the auxiliary frame 2, and allows the auxiliary frame 2 to move relative to the main frame 1 in the front-rear direction (see reference). Figure 12 The following will be explained in detail with reference to the illustrations. For ease of explanation, the X direction in the illustrations refers to the direction of the bed frame from left to right, the Y direction refers to the direction of the bed frame from front to back, and the Z direction refers to the direction of the bed frame from bottom to top.

[0032] [Main Frame] Combination Figures 3 to 6 The main frame 1 includes a first frame 1A, a second frame 1B, a connecting block 1C, and a third frame 1D. A first pad for supporting the user's limbs (such as supporting the head or upper body) can be installed on the main frame 1.

[0033] The first frame 1A is the main structure of the main frame 1, and its bottom is equipped with support feet. The first frame 1A has a mounting opening G, and a rack P is mounted on it. The massage mechanism (not shown) can pass through the mounting opening G, allowing the traveling gears on both sides of the massage mechanism to mesh with the rack P. When the traveling gears rotate, the massage mechanism can move in the forward and backward direction. The massage mechanism may be, for example, the massage mechanism disclosed in patent application CN202510510082.2, but it is not the focus of this application and will not be described further.

[0034] The second frame 1B is installed at the upper middle position of the first frame 1A. The second frame 1B includes a cuboid frame and connecting rods located on the left and right sides of the frame. The second frame 1B is connected to the first frame 1A through the connecting rods. The second frame 1B and the first frame 1A cooperate to support the user's limbs.

[0035] The interlocking block 1C corresponds to the position of the mounting port G. The interlocking block 1C can be detachably fixed to the first frame 1A by screws. The interlocking block 1C is used to cover the mounting port G.

[0036] The third frame 1D is installed vertically at the middle position of the first frame 1A, combined with... Figure 4 The third frame 1D has sliding grooves W on both its left and right sides. The third frame 1D slides with the sliding connecting device 3 in the front-back direction through the sliding grooves W, thereby allowing the sliding connecting device 3 to move relative to the main frame 1 in the front-back direction. The third frame 1D of the bed frame has a front trigger T1 and a rear trigger T2, which are used to work in conjunction with the sliding connecting device 3, as will be explained further later.

[0037] [Auxiliary Frame] The auxiliary frame 2 assists the main frame 1 in supporting the user. The auxiliary frame 2 is connected to the main frame 1 via a sliding connection device 3, allowing it to move relative to the main frame 1 in the front-back direction. A second pad supporting the user's limbs (lower body) can be installed on the auxiliary frame 2. Combined with... Figure 7 The auxiliary frame 2 includes a sliding connection 2A located on the lower side, a support 2B located on the upper side, and a longitudinal connection 2C located between the front side of the sliding connection 2A and the front side of the support 2B. The sliding connection 2A has a front pivot 2D and a rear pivot 2E. The auxiliary frame 2 is pivotally connected to the swing frame 3D of the sliding connection device 3 through the front pivot 2D and the rear pivot 2E of the sliding connection 2A, as will be further explained later.

[0038] [Sliding Connection Device] The sliding connection device 3 is located between the main frame 1 and the auxiliary frame 2, enabling the auxiliary frame 2 to move relative to the main frame 1 in the front-back direction. In this embodiment, the sliding connection device 3 includes a movable frame 3A, two roller assemblies 3I, two swing frames 3D, and a swing state control mechanism 3H. The roller assembly 3I includes a rotating shaft 3B and rollers 3C. The swing state control mechanism 3H includes two adjusting components 3G, each of which includes a moving part 3E and an elastic part 3F.

[0039] The outer contour of the movable frame 3A is roughly rectangular. Figure 4 , Figure 8 and Figure 9 The movable frame 3A is located between the sliding grooves W on the left and right sides of the third frame 1D. It has two side plates Q1 spaced apart from each other, two partition plates Q2 spaced apart from each other between the two side plates Q1, and a bottom plate Q3 located below the two side plates Q1. The side plates Q1 have insertion holes Q11 for engaging with the rotating shaft 3B. The partition plates Q2 have insertion holes Q21 for engaging with the second mating part N2 of the moving part 3E. The bottom plate Q3 has a rear groove K1 on its rear side and a front groove K2 on its front side.

[0040] Two roller assemblies 3I are disposed between the movable frame 3A and the main frame 1 to guide the movable frame 3A to move in the front-back direction. Specifically, the rotating shafts 3B of the two roller assemblies 3I are respectively disposed on the front and rear sides of the movable frame 3A. The rotating shafts 3B extend to the left and right and rotatably pass through the movable frame 3A (through the insertion hole Q11 on the side plate Q1). Rollers 3C are installed on the left and right sides of the rotating shafts 3B, and the rollers 3C are installed in the sliding grooves W of the third frame 1D. Through the above installation method, the movable frame 3A is configured to move relative to the main frame 1 in the front-back direction.

[0041] Among them, the two swing frames 3D are spaced apart in the front-to-back direction, combined with Figure 12 Both sides of the two swing frames 3D are pivotally connected to the movable frame 3A and the auxiliary frame 2, respectively. The two swing frames 3D swing synchronously in a controlled manner, and can sequentially change between a forward tilting state, a longitudinally extended state, and a backward tilting state. Figure 8The two swing frames 3D are respectively the rear swing frame 3D-1 and the front swing frame 3D-2, corresponding to the two rotating shafts 3B. The two roller assemblies 3I also correspond to the two swing frames 3D. The lower sides of swing frames 3D-1 and 3D-2 are respectively sleeved on the rotating shafts 3B of the corresponding roller assemblies 3I (i.e., pivotally connected to the movable frame 3A by sleeved on the rotating shafts 3B). This arrangement ensures that the rotation center of each swing frame 3D relative to the movable frame 3A coincides with the rotation center of the corresponding roller assembly 3I. The upper side of the rear swing frame 3D-1 is sleeved on the rear pivot part 2E, and the upper side of the front swing frame 3D-2 is sleeved on the front pivot part 2D. Through the above installation method, swing frames 3D-1 and 3D-2 are both pivotally connected to the movable frame 3A and the auxiliary frame 2, respectively. Figure 9 In this embodiment, the swing frame 3D includes two swing rods M1 spaced apart from each other on the left and right, and a connecting rod M2 located between the two swing rods M1. The swing rods M1 have a flat structure. The lower side of the swing rods M1 of the two swing frames is sleeved on the corresponding rotating shaft 3B. The upper side of the swing rod M1 of the swing frame 3D-1 is sleeved on the rear pivot part 2E, and the upper side of the swing rod M1 of the swing frame 3D-2 is sleeved on the front pivot part 2D.

[0042] The swing state control mechanism 3H is installed on the movable frame 3A and can switch between the swing-allowed state and the swing-obstructed state. When the swing state control mechanism 3H is in the swing-allowed state, it allows the two swing frames 3D to swing synchronously. When it is in the swing-obstructed state, it obstructs the two swing frames 3D from swinging synchronously.

[0043] Specifically, combined Figure 12 and Figure 13When the auxiliary frame 2 moves from front to back relative to the main frame 1, the front side of the auxiliary frame 2 sequentially passes through the first displacement segment L1, the second displacement segment L2, and the third displacement segment L3 (the bed frame changes from an unfolded state to a folded state). The extension distance of the first displacement segment L1 and the third displacement segment L3 in the front-back direction can be 1 / 5 to 1 / 3 of the extension distance of the second displacement segment L2 in the front-back direction, for example, 1 / 3. The swing state control mechanism 3H is configured to: be in a swing-allowed state during the process of the front side of the auxiliary frame 2 passing through the first displacement segment L1 from front to back, so that the two swing frames 3D can synchronously change from a forward tilting state to a longitudinally extended state; be in a swing-resisting state during the process of the front side of the auxiliary frame 2 passing through the second displacement segment L2 from front to back, so that the two swing frames 3D can remain in a longitudinally extended state; and be in a swing-allowed state during the process of the front side of the auxiliary frame 2 passing through the third displacement segment L3 from front to back, so that the two swing frames 3D can synchronously change from a longitudinally extended state to a backward tilting state. When the front side of the auxiliary frame 2 is located within the second displacement segment L2, the vertical distance between the auxiliary frame 2 and the main frame 1 is H2. When it is located within the first displacement segment L1 and the third displacement segment L3, the vertical distance between the auxiliary frame 2 and the main frame 1 is H1. The distance H2 is greater than the distance H1, that is, the vertical clearance between the auxiliary frame 2 and the main frame 1 is adjustable. This method helps to reduce the frictional resistance experienced by the auxiliary frame 2 during the back-and-forth sliding process, especially the resistance from the main frame 1 or the pad (not shown) installed on the main frame 1. The solution of this application enriches the design ideas of the bed frame.

[0044] In this embodiment, the swing state control mechanism 3H is controlled by the front trigger T1 and the rear trigger T2 to switch between the swing-allowed state and the swing-resisting state. Specifically, the front trigger T1 is configured to switch the swing state control mechanism 3H between the swing-allowed state and the swing-resisting state when it moves to the junction of the first displacement segment L1 and the second displacement segment L2 on the front side of the auxiliary frame 2. The rear trigger T2 is configured to switch the swing state control mechanism 3H between the swing-allowed state and the swing-resisting state when it moves to the junction of the second displacement segment L2 and the third displacement segment L3 on the front side of the auxiliary frame 2.

[0045] In this embodiment, the swing state control mechanism 3H includes two adjustment components 3G: an adjustment component 3G-1 located on the rear side and an adjustment component 3G-2 located on the front side, corresponding to the two swing frames respectively. Combined with... Figure 13The front adjustment component 3G-2 is controlled by the front trigger T1 and switches between a first state that allows the front swing frame 3D-2 to swing forward and a second state that prevents the front swing frame 3D-2 from swinging forward; the rear adjustment component 3G is controlled by the rear trigger T2 and switches between a first state that allows the rear swing frame 3D-1 to swing backward and a second state that prevents the rear swing frame 3D-1 from swinging backward.

[0046] In this embodiment, both adjustment components 3G include a movable member 3E and an elastic member 3F. The movable member 3E can move back and forth relative to the movable frame 3A within a set range to switch between a position that hinders the swing of the swing frame 3D and a position that allows the swing of the swing frame 3D. The elastic member 3F of the adjustment component 3G located on the front side applies an elastic force to its movable member 3E to maintain its forward movement tendency, while the elastic member 3F of the adjustment component 3G located on the rear side applies an elastic force to its movable member 3E to maintain its backward movement tendency.

[0047] Combination Figures 9 to 11 The movable component 3E includes a first mating part N1 and a second mating part N2. The first mating part N1 is used to engage with the swing frame 3D, and the second mating part N2 is used to engage with the elastic component 3F. The first mating part N1 has a first plate part N11, a second plate part N12, a third plate part N13, and a fourth plate part N14. The second plate part N12 is located on the left and right sides of the first plate part N11, the third plate part N13 is located below the first plate part N11 and the second plate part N12, and the fourth plate part N14 is located above the second plate part N12. The second plate part N12 has elongated holes N15 arranged front and back. The second plate part N12 is sleeved on the rotating shaft 3B through the elongated holes N15, so that the movable component 3E and the rotation center of the roller assembly 3I slide in the front and back direction. In this way, the movable component 3E can move back and forth relative to the movable frame 3A within a set range. The fourth plate part N14 is used to engage with the connecting rod M2 of the swing frame 3D to control the swing frame 3D to change between the first state and the second state. The second mating part N2 is connected to the first plate part N11 of the first mating part N1 and extends in the front-rear direction. The second mating part N2 is rod-shaped and passes through the insertion hole Q21. The elastic element 3F is a telescopic spring. The elastic element 3F is sleeved on the second mating part N2, and the two sides of the elastic element 3F abut against the first plate part N11 of the first mating part N1 and the partition plate Q2 of the movable frame 3A, respectively.

[0048] Please refer to Figure 13When the movable frame 3A moves forward and the front trigger T1 engages with the front slot K2, it pushes the moving part 3E of the adjusting assembly 3G-2 located on the front side. This causes the elastic part 3F of the adjusting assembly 3G-2 to elastically contract, and the moving part 3E of the adjusting assembly 3G-2 to be pushed, making room for the swing frame 3D-2 to swing forward. Conversely, when the movable frame 3A moves backward and the rear trigger T2 engages with the rear slot K1, it pushes the moving part 3E of the adjusting assembly 3G-1 located on the rear side. This causes the elastic part 3F of the adjusting assembly 3G-1 to elastically contract, and the moving part 3E of the adjusting assembly 3G-1 to be pushed, making room for the swing frame 3D-1 to swing backward. When the moving parts on both sides are not pushed by the front trigger T1 and the rear trigger T2, the elastic part 3F is in an extended state. The front movable frame 3E will hinder the front swing frame 3D from swinging forward, and the rear movable frame 3E will hinder the rear swing frame 3D from swinging backward. It should be noted that in this embodiment, the moving part 3E of the adjustment component 3G-2 located on the front side does not prevent the swing frame 3D-2 located on the front side from swinging backward. Correspondingly, the moving part 3E of the adjustment component 3G-1 located on the rear side does not prevent the swing frame 3D-1 located on the rear side from swinging forward.

[0049] [Variations] The above is a bed frame according to one embodiment of this application. It should be understood that there are other variations of this application. In another embodiment, the rollers of the roller assembly 3I can be replaced with sliders. In another embodiment, the lower side of the swing frame 3D may not be sleeved on the rotating shaft 3B, and a pivot part may be provided to pivotally connect the lower side of the swing frame 3D. In another embodiment, the moving member 3E may not slide in the front-back direction with the rotation center of the corresponding roller assembly 3I, and a structure may be provided to limit the sliding range of the moving member 3E in the front-back direction. In the foregoing embodiments, the front trigger member T1 and the rear trigger member T2 are mechanical triggering structures. However, it should be understood that under the concept of this utility model, the swing frame can also be adjusted to swing under electrical signal control (i.e., an electrical control structure can be provided to control the swing frame swing). Correspondingly, the front trigger member T1 and the rear trigger member T2 can be adjusted to trigger members that can trigger the operation of the electrical control structure, such as common electromagnetic induction structures.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A sliding connection device, characterized in that Include: Mobile rack (3A); Two swing frames (3D) are spaced apart in the front-to-back direction, and both swing frames (3D) are pivotally connected to the movable frame (3A). The two swing frames (3D) swing synchronously in a controlled manner, and can sequentially change between a forward tilting state, a longitudinally extended state, and a backward tilting state. A swing state control mechanism (3H) is installed on the movable frame (3A) and can switch between a swing-allowed state and a swing-impeded state. When the swing state control mechanism (3H) is in the swing-allowed state, it allows the two swing frames (3D) to swing synchronously. When it is in the swing-impeded state, it prevents the two swing frames (3D) from swinging synchronously.

2. The sliding connection device according to claim 1, characterized in that, wherein The swing state control mechanism (3H) includes two adjustment components (3G), and the two adjustment components (3G) correspond to the two swing frames (3D) respectively; The adjustment component (3G) located at the front is controlled by the front trigger (T1) and switches between a first state that allows the swing frame (3D) located at the front to swing forward and a second state that prevents the swing frame (3D) located at the front from swinging forward. The adjustment component (3G) located at the rear is controlled by the rear trigger (T2) and switches between a first state that allows the swing frame (3D) located at the rear to swing backward and a second state that prevents the swing frame (3D) located at the rear from swinging backward.

3. The sliding connection device according to claim 2, characterized in that, wherein Both of the aforementioned adjustment components (3G) include a movable element (3E) and an elastic element (3F). The movable element (3E) can move back and forth relative to the movable frame (3A) within a set range to switch between a position that hinders the swing frame (3D) from swinging and a position that allows the swing frame (3D) to swing. Among them, the elastic element (3F) of the adjustment component (3G) located on the front side applies an elastic force to its moving element (3E) to maintain its forward movement tendency; In this process, the elastic element (3F) of the adjustment component (3G) located at the rear applies an elastic force to its moving element (3E) to maintain its tendency to move backward.

4. The slip joint device of claim 1, wherein, Two roller assemblies (3I) are installed on the movable frame (3A). The two roller assemblies (3I) correspond to the two swing frames (3D) respectively. The rotation center of each swing frame (3D) relative to the movable frame (3A) coincides with the rotation center of the corresponding roller assembly (3I).

5. The slip joint device of claim 3, wherein, Two roller assemblies (3I) are installed on the movable frame (3A). The two roller assemblies (3I) correspond to the two adjustment assemblies (3G) respectively. The moving part (3E) of each adjustment assembly (3G) slides in the front-back direction with the rotation center of the corresponding roller assembly (3I).

6. The sliding connection device according to claim 1, characterized in that, The swing frame (3D) includes two swing rods (M1) spaced apart from each other on the left and right, and a connecting rod (M2) located between the two swing rods (M1); the swing rods (M1) are pivotally connected to the movable frame (3A).

7. The sliding connection device according to claim 3, characterized in that, The movable member (3E) includes a first mating part (N1) that mates with the swing frame (3D) and a second mating part (N2) that mates with the elastic member (3F). The elastic member (3F) is a telescopic spring sleeved on the second mating part (N2), and the two sides of the elastic member (3F) abut against the first mating part (N1) and the movable frame (3A) respectively.

8. The sliding connection device according to claim 3, characterized in that, The movable frame (3A) has a rear slot (K1). When the rear trigger (T2) is inserted into the rear slot (K1), it will push the moving part of the adjustment assembly located on the rear side, causing the elastic part of the adjustment assembly located on the rear side to elastically contract.

9. The sliding connection device according to claim 3, characterized in that, The movable frame (3A) has a front slot (K2). When the front trigger (T1) is inserted into the front slot (K2), it will push the moving part of the adjustment assembly located on the front side, causing the elastic part of the adjustment assembly located on the front side to elastically contract.

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