Linkage type locking universal support

Abstract

The utility model relates to the technical field of medical equipment clamping, in particular to a linkage type locking universal support which comprises a screw rod, an upper arm and a lower arm which are adjacently distributed are connected to the screw rod in a sleeved mode, and the end, close to the upper arm, of the screw rod is in threaded connection with an adjustable handle. The upper arm and the lower arm are of the same structure and each comprise a shell, the upper end of each shell is rotationally connected to the corresponding screw in a sleeving mode, a ball cup is arranged at the lower end of each shell, and each ball cup is matched with a movable ball connector. A tensioning block, a connecting rod and an ejector rod which are in linkage fit in sequence are arranged in the shell, and the lower end of the ejector rod movably extends to the ball cup to press and fix the ball connector; the tensioning block is sleeved on the screw rod in a sliding manner; according to the universal support, the linkage type structure is formed between the tensioning block and the ejector rod through the connecting rod, the movable stroke of the connecting rod is the locking adjustment stroke, compared with an inclined plane locking mode adopted in the prior art, the linkage type structure has a larger movable adjustment range, and therefore the abradability of the universal support is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment clamping, in particular to a linkage type locking universal bracket. Background Art

[0002] When medical equipment is in use, it is generally provided with a bracket to provide support. In some applications, it is often necessary to adjust the positions of multiple devices or equipment in various directions.

[0003] Others use the bevel locking method, which has a small locking range and is easy to wear. Once there is a little wear, the arm will fail.

[0004] The published Chinese patent, with publication number CN107013793A, discloses a multi-arm combination universal bracket. The universal bracket can be arbitrarily matched with different bracket accessories to achieve multi-directional changes of each accessory by setting multiple rotating arms and matching locking devices. However, since the locking rod and the third locking block are in contact with an inclined plane, the adjustable locking range is small. Once there is a slight wear, the arm will fail, thereby affecting the use of the entire universal bracket. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a linkage locking universal bracket to solve the problem of small adjustable range of the inclined locking method used in the prior art.

[0006] To achieve the above-mentioned purpose and other related purposes, the utility model provides a linkage locking universal bracket, including a screw rod, on which an upper arm and a lower arm are sleeved and adjacently distributed, and an end of the screw rod close to the upper arm is threadedly connected to an adjustable handle;

[0007] The upper arm and the lower arm have the same structure and both include:

[0008] The outer shell has an upper end which is rotatably sleeved on the screw rod, and a ball head seat is provided at the lower end of the outer shell, and the ball head seat is matched with a movable ball connector;

[0009] The housing is provided with a tension block, a connecting rod and a push rod which are linked in sequence. The lower end of the push rod can be movably extended to the ball head seat to press and fix the ball connector; the tension block is slidably sleeved on the screw rod;

[0010] The lower end of the tension block is provided with a first arc concave surface, and the upper end of the connecting rod is provided with a first arc convex head, and the connecting rod and the tension block are movablely matched by the arc surface of the first arc convex head contacting the first arc concave surface;

[0011] The lower end of the connecting rod is provided with a second arc concave surface, and the upper end of the push rod is provided with a second arc convex head. The push rod and the connecting rod are movablely matched by the arc surface of the second arc convex head contacting the second arc concave surface.

[0012] In one embodiment of the utility model, the housing is provided with a side U-shaped cavity, a positioning cavity, and a movable cavity which are connected in sequence from top to bottom, the side U-shaped cavity is distributed in the area where the housing sleeve is connected to the screw rod, and the tension block can be adjusted to be extruded and fitted in the side U-shaped cavity;

[0013] The connecting rod is arranged in the positioning cavity, and the ejector rod is arranged in the movable cavity.

[0014] In one embodiment of the utility model, the opening directions of the U-shaped cavities in the middle sides of the shells of the upper arm and the lower arm are opposite, the handle is in contact and extruded fit with the tensioning block provided on the upper arm, and the tensioning block provided on the upper arm is relatively extruded and fit with the tensioning block provided on the lower arm.

[0015] In one embodiment of the present invention, a gasket is provided between the extrusion ends of the upper arm and the lower arm.

[0016] In one embodiment of the present invention, the vertical height and horizontal length of the positioning cavity are greater than the vertical height and horizontal length of the connecting rod, and the connecting rod has vertical and horizontal movable margins in the positioning cavity.

[0017] In an embodiment of the present invention, a detachable cover is provided at a side end of the housing corresponding to the positioning cavity.

[0018] In one embodiment of the utility model, a spherical pressing concave surface is provided at the lower end of the push rod, and a spherical push block is provided in the spherical pressing concave surface.

[0019] As described above, the linkage locking universal bracket of the utility model has the following beneficial effects:

[0020] The utility model sets a connecting rod, and uses the connecting rod to form a linkage structure between the tension block and the push rod. The movable stroke of the connecting rod is the locking adjustment stroke. Compared with the inclined locking method used in the prior art, the linkage structure has a larger movable adjustment range. The locking failure problem caused by wear can be offset by adjusting the linkage structure, thereby improving the wearability of the universal bracket and extending the service life of the universal bracket. In addition, the linkage structure adopted by the utility model has good overall contact rigidity, so that an effective linkage locking effect can be achieved without much force when adjusting the handle. Arc surface contact is adopted between the tension block and the connecting rod, and between the connecting rod and the push rod, so that the overall linkage response of the linkage structure is flexible and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a three-dimensional structural schematic diagram of the linked locking universal bracket disclosed in the utility model.

[0022] Figure 2 Shown is a schematic cross-sectional structure diagram of the linked locking universal bracket disclosed in the utility model.

[0023] Figure 3 Display as Figure 2 Enlarged view of point A in the middle.

[0024] Component number description

[0025] On the screw rod 1; upper arm 2; lower arm 3; handle 4; housing 5; side U-shaped cavity 51; positioning cavity 52; movable cavity 53; ball head seat 6; ball connector 7; tension block 8; first arc concave surface 81; connecting rod 9; first arc convex head 91; second arc concave surface 92; push rod 10; second arc convex head 101; spherical pressing concave surface 102; gasket 11; ball top block 12; cover plate 13. DETAILED DESCRIPTION

[0026] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0027] See also Figures 1 to 3 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0028] See also Figure 1-3 The utility model provides a linkage locking universal bracket, including a screw rod 1, on which an upper arm 2 and a lower arm 3 are sleeved and adjacently distributed, and the upper arm 2 and the lower arm 3 are respectively used for connecting medical instruments and for fixing; a gasket 11 is provided between the extrusion ends of the upper arm 2 and the lower arm 3; an end of the screw rod 1 close to the upper arm 2 is threadedly connected with an adjustable handle 4.

[0029] The upper arm 2 and the lower arm 3 have the same structure, and both include a shell 5. The upper end of the shell 5 is rotatably sleeved on the screw 1, and the lower end of the shell 5 is provided with a ball head seat 6, and the ball head seat 6 is matched with a movable ball connector 7; the shell 5 is provided with a tensioning block 8, a connecting rod 9, and a push rod 10 that are sequentially linked and matched. Specifically, the shell 5 is provided with a side U-shaped cavity 51, a positioning cavity 52, and a movable cavity 53 that are connected in sequence from top to bottom. The side U-shaped cavity 51 is distributed in the area where the shell 5 is sleeved on the screw 1, and the tensioning block 8 can be adjusted and extruded in the side U-shaped cavity 51; the connecting rod 9 is provided in the positioning cavity 52. ​​Specifically, the up and down height and left and right length of the positioning cavity 52 are greater than the up and down height and left and right length of the connecting rod 9, and the connecting rod 9 exists in the positioning cavity 52. There is room for movement up, down, left and right; and a removable cover plate 13 is provided at the side end of the positioning cavity 52 corresponding to the housing 5, which is convenient for inspection and maintenance of the connecting rod 9; the push rod 10 is arranged in the movable cavity 53, and the lower end of the push rod 10 can be movably extended to the ball head seat 6 to press and fix the ball connector 7; the tensioning block 8 is slidably sleeved on the screw 1; the setting of the connecting rod 9 can form a linkage structure between the tensioning block 8 and the push rod 10, and the movable stroke of the connecting rod 9 is the locking adjustment stroke. Compared with the inclined locking method used in the prior art, the linkage structure has a larger movable adjustment range. By adjusting the linkage structure, the locking failure problem caused by wear can be offset, thereby improving the wearability of the universal bracket, and then extending the service life of the universal bracket.

[0030] The lower end of the tensioning block 8 is provided with a first arc concave surface 81, and the upper end of the connecting rod 9 is provided with a first arc convex head 91, and the connecting rod 9 and the tensioning block 8 are movablely matched by the arc surface of the first arc convex head 91 contacting the first arc concave surface 81; the lower end of the connecting rod 9 is provided with a second arc concave surface 92, and the upper end of the push rod 10 is provided with a second arc convex head 101, and the push rod 10 and the connecting rod 9 are movablely matched by the arc surface of the second arc convex head 101 contacting the second arc concave surface 92; arc surface contact is adopted between the tensioning block 8 and the connecting rod 9, and between the connecting rod 9 and the push rod 10, so that the overall linkage response of the linkage structure is flexible and fast. The lower end of the push rod 10 is provided with a spherical pressing concave surface 102, and a ball top block 12 is provided in the spherical pressing concave surface 102. The spherical pressing concave surface 102 can adaptively lock the movement of the ball connector 7. The ball top block 12 can increase the locking friction between the spherical pressing concave surface 102 and the ball connector 7, thereby improving the locking effect.

[0031] The U-shaped cavity 51 on the middle side of the shell 5 of the upper arm 2 and the lower arm 3 has opposite opening directions, and the handle 4 is in contact with and extruded into a fit with the tensioning block 8 provided on the upper arm 2, and the tensioning block 8 provided on the upper arm 2 is relatively extruded into a fit with the tensioning block 8 provided on the lower arm 3. When in use, the handle 4 is turned to feed the screw 1 threadably, and the tensioning block 8 provided on the upper arm 2 is contacted and extruded, and the tensioning block 8 extrudes the connecting rod 9 to transmit the propulsion force, thereby making the push rod 10 slide downward and press the ball connector 7 to achieve the purpose of locking the upper arm 2; at the same time, the handle 4 contacts and squeezes the upper arm 2 and transmits the extrusion force to the lower arm 3 through the upper arm 2, thereby also achieving the purpose of locking the lower arm 3.

[0032] In summary, the utility model adopts a linkage structure to realize the locking function. Compared with the inclined locking method adopted in the prior art, the linkage structure has a larger range of movable adjustment. By adjusting the linkage structure, the locking failure problem caused by wear can be offset, thereby improving the wearability of the universal bracket; and the linkage structure has good overall contact rigidity, so that when adjusting the handle 4, it does not require much force to achieve an effective linkage locking effect; the linkage parts of the linkage structure all adopt arc surface contact, the overall linkage reaction is flexible and fast, and the use effect is good. Therefore, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A linkage locking universal bracket, comprising a screw rod (1), an upper arm (2) and a lower arm (3) arranged adjacent to each other are sleeved on the screw rod (1), and an adjustable handle (4) is threadedly connected to one end of the screw rod (1) close to the upper arm (2); Features: The upper arm (2) and the lower arm (3) have the same structure, and both include: The outer shell (5) has an upper end which is rotatably sleeved on the screw rod (1), and a ball head seat (6) is provided at the lower end of the outer shell (5), and the ball head seat (6) is matched with a movable ball connector (7); The housing (5) is provided with a tension block (8), a connecting rod (9), and a push rod (10) which are sequentially linked and matched, and the lower end of the push rod (10) can be movably extended to the ball head seat (6) to press and fix the ball connector (7); the tension block (8) is slidably sleeved on the screw rod (1); The lower end of the tension block (8) is provided with a first arc concave surface (81), and the upper end of the connecting rod (9) is provided with a first arc convex head (91), and the connecting rod (9) and the tension block (8) are movablely matched by the arc surface of the first arc convex head (91) contacting the first arc concave surface (81); The lower end of the connecting rod (9) is provided with a second arc concave surface (92), and the upper end of the push rod (10) is provided with a second arc convex head (101). The push rod (10) and the connecting rod (9) are movablely matched by the arc surface of the second arc convex head (101) contacting the second arc concave surface (92).

2. The linkage locking universal bracket according to claim 1, characterized in that: The housing (5) is provided with a side U-shaped cavity (51), a positioning cavity (52), and a movable cavity (53) which are connected in sequence from top to bottom. The side U-shaped cavity (51) is distributed in the area where the housing (5) is sleeved with the screw rod (1). The tension block (8) is adjustably extruded and fitted in the side U-shaped cavity (51). The connecting rod (9) is arranged in the positioning cavity (52), and the push rod (10) is arranged in the movable cavity (53).

3. The linkage locking universal bracket according to claim 2, characterized in that: The opening directions of the U-shaped cavities (51) in the middle sides of the shells (5) of the upper arm (2) and the lower arm (3) are opposite, the handle (4) is in contact with and extruded into a tensioning block (8) provided on the upper arm (2), and the tensioning block (8) provided on the upper arm (2) is in relative extrusion with the tensioning block (8) provided on the lower arm (3).

4. The linkage locking universal bracket according to claim 3, characterized in that: A gasket (11) is provided between the extrusion ends of the upper arm (2) and the lower arm (3).

5. The linkage locking universal bracket according to claim 2, characterized in that: The vertical height and the left-right length of the positioning cavity (52) are both greater than the vertical height and the left-right length of the connecting rod (9), and the connecting rod (9) has vertical and left-right movable margins in the positioning cavity (52).

6. The linkage locking universal bracket according to claim 5, characterized in that: A detachable cover plate (13) is provided at the side end of the housing (5) corresponding to the positioning cavity (52).

7. The linkage locking universal bracket according to claim 1, characterized in that: The lower end of the push rod (10) is provided with a spherical pressing concave surface (102), and a spherical push block (12) is provided in the spherical pressing concave surface (102).

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