Adjustable PAM rammer

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to an adjustable PAM rammer which comprises a head cylinder, an arc-shaped arm, a combination part square block and a ramming part, the head cylinder and the combination part square block are fixed to the two ends of the arc-shaped arm respectively, a groove higher than the end of the ramming part is formed in the side face of the combination part square block, and the end of the ramming part is embedded into the groove. And the ramming component can be adjusted up and down in the groove of the combination part square block, so that the linear distance between the head cylinder and the ramming component is changed, the position of the ramming component can be adjusted according to people with different body types, and the ramming component can be adjusted according to people with large body types. The distance between the head cylinder and the ramming part is increased and changed, the situation that the PAM ramming device cannot be fixed due to size limitation is prevented, the distance between the head cylinder and the ramming part is reduced and changed for a person with a small size, and the phenomena that the head cylinder is too far away from the ramming part, the force conduction distance is too long and control is not accurate are prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an adjustable PAM rammer. Background Art

[0002] The distance between the head cylinder and the tamping part of the existing traditional PAM tampers is fixed and cannot be adjusted. For people with large bodies, if the distance between the head cylinder and the tamping part is short, the PAM tampers cannot be fixed due to size restrictions. For people with small bodies, if the distance between the head cylinder and the tamping part is long, the head cylinder will be too far away from the tamping part, the force transmission distance will be too long, and the control will be inaccurate.

[0003] For example, the PAM tamping device assembly with patent application number CN202221535856.5 includes a medical joint block, a medical arc arm, a medical head cylinder, a medical first component, a medical second component and a medical fixing screw, wherein: the middle of the top of the medical joint block is fixedly connected to the bottom end of the medical arc arm, and the other end of the medical arc arm is fixedly connected to one side of the surface of the medical head cylinder. However, the disadvantage of this technical solution is that the distance between the head cylinder and the tamping component is fixed and cannot be adjusted, and the scope of application is small. Utility Model Content

[0004] The purpose of the utility model is to provide an adjustable PAM rammer to solve the problems in the prior art. The specific technical solution is as follows:

[0005] An adjustable PAM rammer comprises a head cylinder, an arc-shaped arm, a joint block and a rammer component. The head cylinder and the joint block are respectively fixed at two ends of the arc-shaped arm. A groove higher than the height of the end of the rammer component is provided on the side of the joint block. The end of the rammer component is embedded in the groove and is squeezed and fixed in the groove of the joint block by a screw assembly.

[0006] Furthermore, reinforcing ribs are provided on the inner side of the arc-shaped arm.

[0007] Furthermore, the block of the combined part includes a combining block body, a groove is arranged on the side of the combining block body, a tooth group 1 is arranged on the inner wall of the groove, and the tamping component is engaged with the tooth group 1.

[0008] Furthermore, the screw assembly includes a screw, a top plate, a push plate and a rubber pad. The block body is rotatably connected to the screw, the screw is fixedly connected to the top plate, the top plate squeezes the push plate and is slidably connected in the block body, the push plate is fixedly connected to the rubber pad, and the rubber pad is attached to the ramming component.

[0009] Furthermore, the screw is provided with a hexagonal screw hole.

[0010] Furthermore, the push plate is fixedly connected to the slide rod, the slide rod slides on the combination block body, the slide rod is covered with a spring, one end of the spring is fixed on the push plate, and the other end of the spring is fixed in the combination block body.

[0011] Furthermore, the tamping component includes a head ball, a rod, a tail block and a tooth group 2 arranged on the side of the tail block, the head ball is fixed to one end of the rod, the tail block is threadedly connected to the other end of the rod, the tooth group 2 is meshed with the tooth group 1, and the rubber pad 1 is attached to the tail block.

[0012] Furthermore, the line connecting the center point of the head cylinder and the center point of the head ball is perpendicular to the axis of the rod, and an infrared illuminator is installed at the lower end of the head cylinder.

[0013] Furthermore, a horizontal device is installed at the connection between the head cylinder and the arc arm, and the horizontal device includes a support frame, which is installed at the connection between the head cylinder and the arc arm. The support frame is rotatably connected to the level bracket, and rubber pads 2 and 3 are respectively fixed at the upper and lower ends of the support frame. Rubber pads 2 and 3 are both slidably connected to the level bracket, and a level is installed in the level bracket.

[0014] Furthermore, a bracket is fixed in the level bracket, the bracket is fixedly connected to the elastic metal sheet, the elastic metal sheet is fixedly connected to the splint, the elastic metal sheet is slidably connected to the level bracket, the elastic metal sheet is fixedly connected to the limit column, the limit column is slidably connected to the level bracket, the support frame is provided with a groove, and the limit column is clamped in the groove.

[0015] The advantages of the utility model are:

[0016] The tamping component can be adjusted up and down in the groove of the joint block, thereby changing the straight-line distance between the head cylinder and the tamping component. The position of the tamping component can be adjusted according to people of different body shapes. For people with large bodies, the distance between the head cylinder and the tamping component can be increased to prevent the PAM tamper from being unable to be fixed due to size limitations. For people with small bodies, the distance between the head cylinder and the tamping component can be reduced to prevent the head cylinder from being too far away from the tamping component, resulting in a long force transmission distance and inaccurate control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 3 Schematic diagram of the block structure of the joint part of the utility model Figure 1 ;

[0020] Figure 4 Schematic diagram of the block structure of the joint part of the utility model Figure 2 ;

[0021] Figure 5 Schematic diagram of the block structure of the joint part of the utility model Figure 3 ;

[0022] Figure 6 Schematic diagram of the block structure of the joint part of the utility model Figure 4 ;

[0023] Figure 7 The structure of the tamping component of the utility model is schematically shown in FIG. Figure 1 ;

[0024] Figure 8 The structure of the tamping component of the utility model is schematically shown in FIG. Figure 2 ;

[0025] Fig. 9 The horizontal device structure of the utility model is shown in FIG. Figure 1 ;

[0026] Fig.10 The horizontal device structure of the utility model is shown in FIG. Figure 2 ;

[0027] Fig.11 The horizontal device structure of the utility model is shown in FIG. Figure 3 ;

[0028] Fig.12 The horizontal device structure of the utility model is shown in FIG. Figure 4 ;

[0029] Description of the markings in the figure:

[0030] 1. Head cylinder; 2. Arc arm; 3. Joint block; 301. Joint block body; 302. Tooth set one; 303. Screw; 304. Hexagonal screw hole; 305. Top plate; 306. Push plate; 307. Rubber pad one; 308. Slide rod; 309. Spring; 4. Ramming component; 401. Head ball; 402. Rod; 403. Tail block; 404. Tooth set two; 5. Infrared illuminator; 6. Leveling device; 601. Support frame; 602. Level bracket; 603. Rubber pad two; 604. Rubber pad three; 605. Level; 606. Clamp; 607. Elastic metal sheet 608; Bracket; 609. Limit column; 610. Groove; 7. Reinforcement ribs. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] Embodiment 1

[0034] like Figure 1-12 As shown, an adjustable PAM tamping device comprises a head cylinder 1, an arc-shaped arm 2, a connecting block 3 and a tamping component 4. The head cylinder 1 and the connecting block 3 are respectively fixed at two ends of the arc-shaped arm 2. A groove higher than the height of the end of the tamping component 4 is provided on the side of the connecting block 3. The end of the tamping component 4 is embedded in the groove and is squeezed and fixed in the groove of the connecting block 3 by a screw assembly. The screw assembly is threadedly connected to the connecting block 3.

[0035] The working principle of the above technical solution is as follows: the tamping component 4 is located in the joint and contacts the cartilage, and the combination of the head cylinder 1, the arc-shaped arm 2 and the joint block 3 is located outside the joint and is used to transmit the tamping force to the tamping component 4. After the subchondral bone of the femoral trochlea is formed, the trochlea groove cartilage with the original abnormal shape is tamped and plasticized to conform to and match the newly formed trochlea groove. The tamping component 4 can be adjusted up and down in the joint block 3, thereby changing the straight-line distance between the head cylinder 1 and the tamping component 4. The position of the tamping component 4 can be adjusted according to people of different body shapes. For people with large body shapes, the distance between the head cylinder 1 and the tamping component 4 is increased and changed to prevent the PAM tamper from being unable to be fixed due to size restrictions. For people with small body shapes, the distance between the head cylinder 1 and the tamping component 4 is reduced and changed to prevent the head cylinder 1 from being too far away from the tamping component 4, resulting in a long force transmission distance and inaccurate control.

[0036] Embodiment 2

[0037] like Figure 1-12 As shown, a reinforcing rib 7 is provided on the inner side of the arc-shaped arm 2;

[0038] The working principle of the above technical solution is: the arc-shaped arm 2 will bend and deform after long-term use, and the reinforcing rib 7 can further strengthen the arc-shaped arm 2 to increase its service life.

[0039] Embodiment 3

[0040] like Figure 1-12 As shown, the combining block 3 includes a combining block body 301, a groove is arranged on the side of the combining block body 301, a tooth set 1 302 is arranged on the inner wall of the groove, and the tamping component 4 is engaged with the tooth set 1 302;

[0041] The screw assembly includes a screw 303, a top plate 305, a push plate 306 and a rubber pad 307. The block body 301 is rotatably connected to the screw 303, the screw 303 is fixedly connected to the top plate 305, the top plate 305 squeezes the push plate 306 and is slidably connected in the block body 301, the push plate 306 is fixedly connected to the rubber pad 307, and the rubber pad 307 is attached to the tamping component 4;

[0042] The push plate 306 is fixedly connected to the slide bar 308, the slide bar 308 slides on the combination block body 301, and the slide bar 308 is covered with a spring 309, one end of the spring 309 is fixed on the push plate 306, and the other end of the spring 309 is fixed in the combination block body 301;

[0043] The working principle of the above technical solution is as follows: the process of adjusting the tamping component 4 up and down is as follows: the screw 303 is turned, the screw 303 moves outward on the combination block body 301, driving the top plate 305 to move outward, and the push plate 306 loses the squeezing force of the top plate 305 on it. Under the contraction of the spring 309, the slide bar 308 and the combination block body 301 are driven to slide, driving the push plate 306 and the rubber pad 307 to move toward the direction close to the screw 303, and the tamping component 4 loses the squeezing force of the rubber pad 307 on it. At this time, the tamping component 4 can be pulled out and moved up. Or after moving down, reinsert the combining block body 301, and the side of the ramming component 4 re-engages into the tooth group 302, and the screw 303 is turned to drive the top plate 305 to move in the direction of the ramming component 4, drive the top plate 305 to squeeze the push plate 306 and the rubber pad 307 to move in the direction of the ramming component 4, drive the slide rod 308 and the combining block body 301 to slide, drive the spring 309 to be stretched, and the rubber pad 307 squeezes the ramming component 4 tightly against the tooth group 302 to prevent the ramming component 4 from moving at will, thereby completing the adjustment of the position of the ramming component 4.

[0044] Embodiment 4

[0045] like Figure 1-12 As shown, the screw 303 is provided with a hexagonal screw hole 304;

[0046] The working principle of the above technical solution is: the screw 303 can be disassembled and installed by a hexagonal screwdriver, thereby increasing the disassembly and installation methods.

[0047] Embodiment 5

[0048] like Figure 1-12 As shown, the tamping component 4 includes a head ball 401, a rod 402, a tail block 403 and a second tooth group 404 arranged on the side of the tail block 403, the head ball 401 is fixed to one end of the rod 402, the tail block 403 is threadedly connected to the other end of the rod 402, the second tooth group 404 is meshed with the first tooth group 302, and the rubber pad 307 is attached to the tail block 403;

[0049] The working principle of the above technical solution is as follows: the process of adjusting the tamping component 4 up and down is to rotate the screw 303, the screw 303 moves outward on the connecting block body 301, driving the top plate 305 to move outward, and the push plate 306 loses the squeezing force of the top plate 305 on it. Under the contraction of the spring 309, the slide bar 308 and the connecting block body 301 are driven to slide, driving the push plate 306 and the rubber pad 307 to move toward the direction close to the screw 303, and the tail block 403 loses the squeezing force of the rubber pad 307 on it. At this time, the tamping component 4 can be pulled out, and the tamping component 4 can be moved up or down and then reinserted into the connecting block body. 301, the tooth group 2 404 on the side of the tail block 403 re-engages with the tooth group 1 302, and the screw 303 is turned to drive the top plate 305 to move in the direction of the tail block 403, drive the top plate 305 to squeeze the push plate 306 and the rubber pad 1 307 to move in the direction of the tail block 403, drive the slide bar 308 and the combination block body 301 to slide, drive the spring 309 to be stretched, and the rubber pad 1 307 squeezes the tail block 403 tightly against the tooth group 1 302, so that the tooth group 2 404 and the tooth group 1 302 are meshed and tightly, preventing the tamping component 4 from moving at will, thereby completing the adjustment of the position of the tamping component 4;

[0050] The rod 402 is threadedly connected to the tail block 403, and the rod 402 can be rotated to be removed and replaced with rods 402 of other specifications according to actual needs. Therefore, there is no need to produce the tail block 403, and only rods 402 of different specifications need to be produced, thereby saving production costs.

[0051] Embodiment 6

[0052] like Figure 1-12 As shown, the line connecting the center point of the head cylinder 1 and the center point of the head ball 401 is perpendicular to the axis of the rod 402, and an infrared irradiator 5 is installed at the lower end of the head cylinder 1;

[0053] The working principle of the above technical solution is: the light irradiated by the infrared irradiator 5 can fall on the head ball 401. When the head ball 401 acts on the body, the light irradiated by the infrared irradiator 5 falls on the skin directly above the head ball 401, and the approximate position of the head ball 401 acting on the body can be inferred.

[0054] Embodiment 7

[0055] like Figure 1-12 As shown, a horizontal device 6 is installed at the connection between the head cylinder 1 and the arc-shaped arm 2, and the horizontal device 6 includes a support frame 601, which is installed at the connection between the head cylinder 1 and the arc-shaped arm 2, and the support frame 601 is rotatably connected to a level bracket 602, and a rubber pad 2 603 and a rubber pad 3 604 are fixed at the upper and lower ends of the support frame 601, respectively, and the rubber pad 2 603 and the rubber pad 3 604 are both slidably connected to the level bracket 602, and a level 605 is installed in the level bracket 602;

[0056] A bracket 608 is fixed in the level bracket 602, the bracket 608 is fixedly connected to the elastic metal sheet 607, the elastic metal sheet 607 is fixedly connected to the clamping plate 606, the elastic metal sheet 607 is slidably connected to the level bracket 602, the elastic metal sheet 607 is fixedly connected to the limit column 609, the limit column 609 is slidably connected to the level bracket 602, the support frame 601 is provided with a groove 610, and the limit column 609 is clamped in the groove 610;

[0057] The working principle of the above technical solution is as follows: when the position of the level 605 is parallel to the axis of the rod 402, the level 605 can monitor whether the tamping component 4 is placed horizontally, and then adjust the position of the entire PAM tamper to make the tamping component 4 placed horizontally to prevent the tamping component 4 from tilting. The transmission of the tamping force is offset, which is not conducive to the plasticization of the original abnormal trochlear groove cartilage to match the newly formed trochlear groove. The limiting column 609 is stuck in the groove 610 to prevent the head cylinder 1, the arc arm 2 and the joint block 3 from vibrating while transmitting the force, causing the level 605 to deviate. The two clamping plates 606 are squeezed to deform the two elastic metal sheets 607. The two elastic metal sheets 607 bend toward each other, driving the limit column 609 to disengage from the groove 610. The level bracket 602 is rotated to make the limit column 609 fit into the other two grooves 610. At this time, the level 605 is perpendicular to the axis of the rod 402. At this time, it is possible to monitor whether the combination of the head cylinder 1, the arc arm 2 and the joint block 3 is vertical in the longitudinal direction, and then adjust the PAM rammer to keep the PAM rammer in the correct posture at all times, accurately transmit force, and reduce damage to surrounding tissues.

[0058] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An adjustable PAM rammer, characterized in that: The invention comprises a head cylinder (1), an arc-shaped arm (2), a connecting block (3) and a tamping component (4). The head cylinder (1) and the connecting block (3) are respectively fixed at two ends of the arc-shaped arm (2). A groove higher than the height of the end of the tamping component (4) is provided on the side of the connecting block (3). The end of the tamping component (4) is embedded in the groove and is squeezed and fixed in the groove of the connecting block (3) by a screw assembly.

2. An adjustable PAM rammer according to claim 1, characterized in that: A reinforcing rib (7) is provided on the inner side of the arc-shaped arm (2).

3. An adjustable PAM rammer according to claim 2, characterized in that: The combining block (3) comprises a combining block body (301), a groove is arranged on the side of the combining block body (301), a tooth set 1 (302) is arranged on the inner wall of the groove, and the tamping component (4) is meshed with the tooth set 1 (302).

4. An adjustable PAM rammer according to claim 3, characterized in that: The screw assembly comprises a screw (303), a top plate (305), a push plate (306) and a rubber pad (307); the coupling block body (301) is rotatably connected to the screw (303); the screw (303) is fixedly connected to the top plate (305); the top plate (305) squeezes the push plate (306) to be slidably connected in the coupling block body (301); the push plate (306) is fixedly connected to the rubber pad (307); and the rubber pad (307) is attached to the tamping component (4).

5. An adjustable PAM rammer according to claim 4, characterized in that: The screw (303) is provided with a hexagonal screw hole (304).

6. An adjustable PAM rammer according to claim 5, characterized in that: The push plate (306) is fixedly connected to the slide rod (308), the slide rod (308) slides on the combination block body (301), the slide rod (308) is covered with a spring (309), one end of the spring (309) is fixed on the push plate (306), and the other end of the spring (309) is fixed in the combination block body (301).

7. An adjustable PAM rammer according to claim 6, characterized in that: The tamping component (4) comprises a head ball (401), a rod (402), a tail block (403) and a second tooth group (404) arranged on the side of the tail block (403); the head ball (401) is fixed to one end of the rod (402); the tail block (403) is threadedly connected to the other end of the rod (402); the second tooth group (404) is meshed with the first tooth group (302); and the first rubber pad (307) is attached to the tail block (403).

8. An adjustable PAM rammer according to claim 7, characterized in that: The line connecting the center point of the head cylinder (1) and the center point of the head ball (401) is perpendicular to the axis of the rod (402), and an infrared irradiator (5) is installed at the lower end of the head cylinder (1).

9. An adjustable PAM rammer according to claim 8, characterized in that: A horizontal device (6) is installed at the connection between the head cylinder (1) and the arc-shaped arm (2), and the horizontal device (6) comprises a support frame (601), the support frame (601) is installed at the connection between the head cylinder (1) and the arc-shaped arm (2), the support frame (601) is rotatably connected to a level bracket (602), a rubber pad 2 (603) and a rubber pad 3 (604) are respectively fixed at the upper and lower ends of the support frame (601), the rubber pad 2 (603) and the rubber pad 3 (604) are both slidably connected to the level bracket (602), and a level (605) is installed in the level bracket (602).

10. An adjustable PAM rammer according to claim 9, characterized in that: A bracket (608) is fixed inside the level bracket (602); the bracket (608) is fixedly connected to the elastic metal sheet (607); the elastic metal sheet (607) is fixedly connected to the clamping plate (606); the elastic metal sheet (607) is slidably connected to the level bracket (602); the elastic metal sheet (607) is fixedly connected to the limiting column (609); the limiting column (609) is slidably connected to the level bracket (602); a groove (610) is provided on the support frame (601); and the limiting column (609) is snap-fitted into the groove (610).

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