Adjustable skin traction device

Abstract

The invention provides an adjustable skin traction device which comprises a base, a fixing device is arranged on the upper surface of the base, and a first gear is arranged in the fixing device in the left-right direction; the tail end of the first transverse rod is fixed to a first gear, the first gear is fixed to the base through a fixing device, and a second gear is arranged at the top end of the first transverse rod in the front-back direction; a clamping block is arranged at the end of the second cross rod, the clamping block is matched with the top end of the first cross rod, a limiting rod is arranged in the middle of the clamping block and makes contact with the second gear, and the other end of the second cross rod is connected with a suction cup; a plurality of suckers are arranged on the lower surface of the leather tightening plate. Front-back movement is achieved through the first transverse rod, up-down movement is achieved through the second transverse rod, and therefore the leather tightening effect is achieved in the movement process of the leather tightening plate.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an adjustable skin traction device. Background Art

[0002] In clinical puncture operations, "skin stretching" is a crucial technical step. By stretching the skin, the sliding of subcutaneous tissues (such as fat and muscle) can be reduced, making the position of the puncture target (such as veins, lumbar intervertebral spaces) relatively fixed. For example, during venous puncture, skin stretching can prevent the vein from "rolling" due to skin movement, which is particularly important for veins with poor elasticity or those that are slender (such as in elderly patients or children). However, currently, when medical staff perform puncture operations, they need to hold the puncture needle in one hand and the imaging guidance device in the other hand, and a second person is required to assist in stretching the skin to be punctured, which greatly reduces the work efficiency of medical staff. Therefore, an auxiliary device is needed to help medical staff stretch the patient's skin. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages existing in the prior art and propose one.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: An adjustable skin traction device includes the following steps: including A base, on whose upper surface there is a fixing device. Inside the fixing device, a first gear is arranged in the left - right direction. On the side of the first gear, there is a connecting rod, and the other end of the connecting rod is connected to a knob. On the side of the base, there is an internal gear, and the internal gear 107 cooperates with the knob; A first cross - bar, whose end is fixed to the first gear. The first gear is fixed on the base through the fixing device. At the top of the first cross - bar, a second gear is arranged in the front - back direction; A second cross - bar, at whose end there is a clamping block. The clamping block cooperates with the top of the first cross - bar 2. In the middle of the clamping block, there is a limiting rod, and the limiting rod is in contact with the second gear. The other end of the second cross - bar is connected to a skin stretching plate; A skin stretching plate, on whose upper surface there is a ball - socket joint structure, and on whose lower surface there are several suction cups.

[0005] Preferably, the fixing device includes a first vertical plate and a second vertical plate. The distance between the first vertical plate and the second vertical plate matches the width of the first gear, and the first gear is arranged in the middle of the fixing device; on the left and right sides of the first vertical plate and the second vertical plate, there are round holes, and in the center of the first gear, there is a through - hole. The first gear is fixed on the fixing device by passing a pin through the first vertical plate, the through - hole, and the round hole of the second vertical plate in sequence.

[0006] Preferably, the connecting rod has a telescopic structure, which includes a base, a spring and a pull rod. The base is fixed to the first gear, and a fixing groove is provided in the base. One end of the spring is fixed to the bottom of the base. A limiting rib is provided on the outer side of the pull rod. The pull rod is matched with the base. The end of the pull rod is connected to the spring, and the other end of the pull rod is fixedly connected to the knob.

[0007] Preferably, the depth of the base is at least 4 cm longer than the length of the pull rod, and the length of the spring is 1 - 4 cm.

[0008] Preferably, the knob includes an external gear and a button cover. The external gear is matched with the internal gear. The external gear is connected to the connecting rod, and the thickness of the internal gear is 1 - 2 cm.

[0009] Preferably, the teeth on the outer side of the second gear are of a toothed structure, and both the tooth top and tooth root adopt arc transitions.

[0010] Preferably, the ball-and-socket joint structure includes a ball seat and a ball head. The ball seat is fixed to the end of the second cross bar, and the ball head is fixedly connected to the skin stretching plate. An annular sealing cavity is provided at the edge of the end of the ball seat. A hydraulic sensor is provided in the annular sealing cavity. The annular sealing cavity is connected to a hydraulic pump. A safety valve is provided between the annular sealing cavity and the hydraulic pump. The pressure of the safety valve is set to 1.2 times the working pressure.

[0011] Preferably, the suction cups are in a hexagonal close-packed structure, and the center distance between adjacent suction cups is 3.5 mm.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention realizes forward and backward movement through the first cross bar, realizes up and down movement through the second cross bar. In addition, the angle between the skin stretching plate and the second cross bar is adjusted through the ball-and-socket joint structure, so as to ensure that the acting force of the suction cup on the skin does not change during the movement of the skin stretching plate and ensure the skin stretching effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of an adjustable skin traction device of the present invention; Figure 2 is a schematic structural diagram of the base of an adjustable skin traction device of the present invention; Figure 3 is a schematic cross-sectional structural diagram of the connecting rod of an adjustable skin traction device of the present invention; Figure 4 is a schematic structural diagram of the base and the pull rod of an adjustable skin traction device of the present invention; Figure 5 is a schematic structural diagram of the knob and the internal gear of an adjustable skin traction device of the present invention; Figure 6 This is a schematic diagram of the connection structure between the first crossbar and the second crossbar of an adjustable skin traction device according to the present invention; Figure 7 This is a schematic cross-sectional structure diagram of the second crossbar and the tensioning plate of an adjustable skin traction device according to the present invention. Detailed implementation manners

[0014] For a further understanding of the purpose, structure, features, and functions of the present invention, the following is a detailed description in conjunction with embodiments.

[0015] As Figures 1-7 shown, an adjustable skin traction device includes a base 1, on the upper surface of which there is a fixing device. Inside the fixing device, a first gear 104 is provided in the left-right direction. On the side of the first gear 104, there is a connecting rod 105, and the other end of the connecting rod 105 is connected to a knob 106. On the side of the base 1, there is an internal gear 107, and the internal gear 107 cooperates with the knob 106; a first crossbar 2, the end of which is fixed to the first gear 104. The first gear 104 is fixed to the base 1 through the fixing device. At the top of the first crossbar 2, a second gear 201 is provided in the front-back direction; a second crossbar 3, at the end of which there is a clamping block 301. The clamping block 301 cooperates with the top of the first crossbar 2. In the middle of the clamping block 301, there is a limiting rod 302, and the limiting rod 302 is in contact with the second gear 201. The other end of the second crossbar 3 is connected to a skin tensioning plate 4; a skin tensioning plate 4, on the upper surface of which there is a ball-and-socket joint structure 401, and on the lower surface of the skin tensioning plate 4, there are several suction cups 402.

[0016] Preferably, the fixing device includes a first vertical plate 102 and a second vertical plate 101. The distance between the first vertical plate 102 and the second vertical plate 101 is matched with the width of the first gear 104, and the first gear 104 is arranged in the middle of the fixing device; on the left and right sides of the first vertical plate 102 and the second vertical plate 101, there are circular holes, and at the center of the first gear 104, there is a fixing hole. The first gear 104 is fixed to the fixing device by sequentially passing a pin 103 through the circular hole and the fixing hole of the first vertical plate 102.

[0017] Preferably, the connecting rod 105 has a telescopic structure, which includes a base 1051, a spring 1052, and a pull rod 1053. The base 1051 is fixed to the first gear 104, and a fixing groove 1054 is provided inside the base 1051; one end of the spring 105 is fixed to the bottom of the base 1051. A limiting rib 1055 is provided on the outer side of the pull rod 1053. The pull rod 1053 is matched with the base 1051. The end of the pull rod 1053 is connected to the spring 1052, and the other end of the pull rod 1053 is fixedly connected to the knob 106. With such a design, it is ensured that the pull rod can only move in the up and down direction within the base.

[0018] Preferably, the depth of the base 1051 is at least 4 cm longer than the length of the pull rod 1053, and the length of the spring 1052 is 1 - 4 cm. With such a design, it is ensured that the pull rod can move within the base, and the pull rod will not leave the base.

[0019] Preferably, the knob 106 includes an external gear and a knob cover. The external gear is matched with the internal gear 107. The external gear is connected to the connecting rod 105, and the thickness of the internal gear 107 is 1 - 2 cm. With such a design, the fixation of the first gear is achieved through the meshing of the external gear and the internal gear.

[0020] Preferably, the teeth 202 on the outer side of the second gear 201 are of a toothed structure, and both the tooth top and the tooth root adopt arc transitions. With such a design, it is ensured that the second crossbar can only rotate in one direction.

[0021] Preferably, the ball - socket joint structure 401 includes a ball socket 4012 and a ball head 4011. The ball socket 4012 is fixed to the end of the second crossbar 3, and the ball head 4011 is fixedly connected to the skin - stretching plate 4. An annular sealing cavity 4013 is provided at the edge of the end of the ball socket 4012. A hydraulic sensor is provided in the annular sealing cavity 4013. The annular sealing cavity 4013 is connected to a hydraulic pump, and a safety valve is provided between the annular sealing cavity 4013 and the hydraulic pump. The pressure of the safety valve is set to 1.2 times the working pressure. Through such a design, the angle between the skin - stretching plate and the second crossbar can be freely adjusted, so that the contact area between the skin - stretching plate and the skin is maximized. In addition, by injecting hydraulic oil into the annular sealing cavity and the hydraulic sensor detecting the pressure in the annular sealing cavity, the locking function of the ball - socket joint structure is realized.

[0022] Preferably, the suction cups 402 are of a hexagonal close - packed structure, and the center - to - center distance between adjacent suction cups is 3.5 mm. With such a design, the adsorption force of the skin - stretching plate on the skin is improved.

[0023] During use, first rotate the second cross bar around the second gear. At this time, the limit rod can prevent the second cross plate from rotating in the reverse direction. Until the skin stretching plate contacts the patient's skin, freely adjust the angle between the skin stretching plate and the skin to ensure that as many suction cups as possible are adsorbed to the skin and apply downward pressure to the skin. At this time, lock the ball and socket joint structure through the annular sealing cavity to ensure that the angle between the skin stretching plate and the second cross bar remains unchanged. Then pinch the button cover and pull it outwards to ensure that the outer gear is separated from the inner gear. At this time, rotate the button cover to drive the connecting rod to rotate, further drive the first gear to rotate, and thus drive the first cross bar to rotate until the skin stretching plate has sufficient tensile force on the skin. At this time, release the button cover, engage the inner gear with the outer gear, and finally apply downward pressure and tensile force in the front and rear directions to the skin, making the skin near the skin stretching plate taut, which is convenient for medical staff to operate.

[0024] The present invention has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and refinements made without departing from the spirit and scope of the present invention fall within the scope of patent protection of the present invention.

Claims

1. An adjustable skin traction device, characterized in that: including a base (1) with a fixing device on its upper surface. Inside the fixing device, a first gear (104) is provided along the left - right direction. A connecting rod (105) is provided on the side of the first gear (104). The other end of the connecting rod (105) is connected to a knob (106). An internal gear (107) is provided on the side of the base (1), and the internal gear (107) cooperates with the knob (106); a first cross - bar (2) whose end is fixed to the first gear (104). The first gear (104) is fixed to the base (1) through the fixing device. A second gear (201) is provided at the top of the first cross - bar (2) along the front - back direction; a second cross - bar (3) with a clamping block (301) at its end. The clamping block (301) cooperates with the top of the first cross - bar (2). A limiting rod (302) is provided in the middle of the clamping block (301). The limiting rod (302) is in contact with the second gear (201). The other end of the second cross - bar (3) is connected to a leather - stretching plate (4); a leather - stretching plate (4) with a ball - socket joint structure (401) on its upper surface and a plurality of suction cups (402) on its lower surface.

2. The adjustable skin traction device according to claim 1, wherein: The fixing device includes a first vertical plate (102) and a second vertical plate (101). The distance between the first vertical plate (102) and the second vertical plate (101) matches the width of the first gear (104). The first gear (104) is arranged in the middle of the fixing device. Circular holes are provided on the left and right sides of the first vertical plate (102) and the second vertical plate (101). A fixing hole is provided at the center of the first gear (104). The first gear (104) is fixed to the fixing device by a pin (103) passing through the circular hole and the fixing hole of the first vertical plate (102) in sequence.

3. The adjustable skin traction device according to claim 1, characterized in that: The connecting rod (105) has a telescopic structure. The telescopic structure includes a base (1051), a spring (1052), and a pull rod (1053). The base (1051) is fixed to the first gear (104), and a fixing groove (1054) is provided inside the base (1051). One end of the spring (1052) is fixed to the bottom of the base (1051). A limiting rib (1055) is provided on the outer side of the pull rod (1053). The pull rod (1053) cooperates with the base (1051). The end of the pull rod (1053) is connected to the spring (1052), and the other end of the pull rod (1053) is fixedly connected to the knob (106).

4. The adjustable skin traction device according to claim 3, wherein: The depth of the base (1051) is at least 4 cm longer than the length of the pull rod (1053), and the length of the spring (1052) is 1 - 4 cm.

5. The adjustable skin traction device according to claim 1, wherein: The knob (106) includes an external gear and a knob cover. The external gear cooperates with the internal gear (107). The external gear is connected to the connecting rod (105), and the thickness of the internal gear (107) is 1 - 2 cm.

6. The adjustable skin traction device according to claim 1, wherein: The teeth (202) on the outer side of the second gear (201) are of a toothed structure, and both the tooth top and the tooth root are transitioned by arcs.

7. The adjustable skin traction device according to claim 1, characterized in that: The ball-and-socket joint structure (401) includes a socket (4012) and a ball head (4011). The socket (4012) is fixed to the end of the second crossbar (3), the ball head (4011) is fixedly connected to the skin-stretching plate (4), an annular sealing cavity (4013) is provided at the edge of the end of the socket (4012), a hydraulic sensor is provided in the annular sealing cavity (4013), the annular sealing cavity (4013) is connected to a hydraulic pump, a safety valve is provided between the annular sealing cavity (4013) and the hydraulic pump, and the pressure of the safety valve is set to 1.2 times the working pressure.

8. The adjustable skin traction device according to claim 1, characterized in that: The suction cups (402) are of a hexagonal close-packed structure, and the center distance between adjacent suction cups is 3.5 mm.

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