Limiting device for surgical instrument

Abstract

The utility model discloses a limiting device for a surgical instrument, which comprises a limiting block, an elastic spring, a locking block, a first switch, a second switch, a screw and a limiting pin, and the position of the second switch in a third through hole is fixed through the limiting pin arranged below the second switch. A containing cavity is formed in the position, corresponding to the top block body of the limiting block, above the second through hole, a groove cavity of the containing cavity is communicated with the first through hole and the external environment, a locking block, a first switch and an elastic spring are arranged in the containing cavity, one part of the first switch is arranged in the containing cavity, and the other part of the first switch is arranged outside the limiting block. The first switch and the locking block are fixed together through a screw. The utility model provides a limiting device for a surgical instrument, which can help to solve the problem of low efficiency caused by large occupied space of the device in the surgical process and meet higher actual use requirements in the surgical process.

Description

Technical Field

[0001] The utility model relates to the technical field related to medical instruments, in particular to a limiting device for surgical instruments. Background Art

[0002] In the current surgical procedures, it is common to encounter steps where the incision of human tissue needs to be stretched and stretched to ensure exposure of internal tissues and facilitate surgical operations. For example, in hip replacement surgery, surgeons will remove the damaged part of the hip joint and replace it with parts made of metal, ceramics, and hard plastics; this artificial joint (prosthesis) helps relieve pain, improve the function of the hip joint, and improve the quality of life of patients; the exposure of the acetabulum during hip replacement surgery is very critical, which is conducive to the exposure of the acetabulum, making it easier to judge the size, position, and bone mass of the acetabulum during surgery, and to place the acetabular cup in the ideal position and angle.

[0003] During actual surgery, existing surgical retractor instruments occupy a large amount of surgical space, are not conducive to being used in conjunction with other joint replacement auxiliary systems, reduce surgical efficiency, and consume physical strength when medical staff use retractors for a long time.

[0004] The existing technical solutions have the following defects:

[0005] 1. The surgical assistants take up a large space and the structure is not compact, which increases the demand for the surgical site. The excessive space occupied affects the surgical operation.

[0006] 2. Too many retractors will occupy too much exposed space, resulting in less operating space for doctors and increasing the difficulty of operation. Utility Model Content

[0007] The purpose of the utility model is to provide a limiting device for a surgical instrument to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A limiting device for a surgical instrument comprises a limiting block, an elastic spring, a locking block, a first switch, a second switch, a screw and a limiting pin, wherein a first through hole is opened on a block body on one side of the limiting block in a longitudinal vertical state corresponding to the first through hole, a second through hole is opened on a block body on the other side of the limiting block in a horizontal horizontal state corresponding to the hole position of the first through hole, a third through hole is opened on the block body of the corresponding limiting block in a connected manner at the middle hole body on the side opposite to the direction of the first through hole, the position of the second switch in the third through hole is fixed by a limiting pin arranged below the third through hole, and the upper position of the second through hole, corresponding to the limiting block A accommodating cavity is provided in the top block body, and the groove cavity of the accommodating cavity is connected with the first through hole and the external environment. A locking block, a first switch and an elastic spring are arranged in the accommodating cavity. The second switch is correspondingly placed in the hole cavity of the third through hole, and the cross-sectional shape of the fixed part of the head end is conical. The cross-sectional width of the operating part of the tail end of the second switch is larger than the aperture of the third through hole, and the operating part of the tail end is placed outside the limit block. A part of the first switch is placed in the accommodating cavity and the other part is placed outside the limit block. The first switch and the locking block are fixed together by screws, and the head end part of the locking block extends into the first through hole.

[0010] As a further solution of the utility model: the elastic spring is arranged in a horizontal state, one end of the elastic spring is correspondingly fixed on the side wall of the locking block and the other end thereof is correspondingly fixed on the inner cavity side wall of the limiting block.

[0011] As a further solution of the utility model: the spreader instrument is equipped with a limit rod and a fixed rod, and a plurality of limit devices are placed on the limit rod in an arbitrary detachable manner, and at the same time, each limit device is respectively equipped with a fixed rod in an arbitrary detachable manner, the fixed rod has a limit groove, and the limit rod has a rotating groove and a sliding groove.

[0012] As a further solution of the utility model: the fixing rod is assembled into the limit device through the first through hole, and at the position indicated by the first limit point, the locking block is pushed forward by utilizing the elastic effect of the elastic spring, and the head end portion of the locking block is interlocked with the limit groove of the fixing rod to form a fixation, and after the second switch enters through the third through hole, its conical head end is at the position indicated by the second limit point, and the conical head end of the second switch is docked with the sliding groove and the rotating groove on the limit rod at the second through hole position, and then fixed by the limit pin under the second switch to maintain the locked state, and the third through hole and the second switch have corresponding threads, and the second switch can be screwed in using the threads.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a limiting device for a surgical instrument, which can help solve the problem of a large space occupied by the device during surgery, resulting in low efficiency, and meet higher practical use requirements during surgery.

[0015] 1. The limit device has two adjustable switches; the locking block is locked with the limit slot on the fixed rod, and can be unlocked using the first switch; the second switch in the limit device can be locked with the rotating slot and the sliding slot on the limit rod at the same time, so as to adjust the relative position of the limit device;

[0016] The design is compact to ensure that the locking structure takes up little space during actual surgery, making it easier for doctors to avoid using auxiliary instruments that would otherwise take up too much space and affect surgical operations.

[0017] 2. The specific number of the limit devices can be increased or decreased as the surgical requirements increase; the limit device is a system that can be increased or decreased according to the doctor's needs;

[0018] The design is as follows: each limit device is independent, and the doctor can adjust the number according to the required expansion position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic diagram of the cross-sectional structure of a limiting device for a surgical instrument.

[0020] Figure 2 The present invention is a schematic diagram of the cross-sectional structure of a surgical instrument in which a limiting device, a limiting rod and a fixing rod cooperate with each other.

[0021] Figure 3 The present invention is a structural schematic diagram of a surgical instrument limit device installed on a supporting instrument.

[0022] In the figure: 1-locking block, 2-screw, 3-first switch, 4-second switch, 5-limiting block, 6-limiting pin, 7-elastic spring, 8-first through hole, 9-second through hole, 10-third through hole, 11-first limiting point, 12-second limiting point, A-fixing rod, B-limiting rod. DETAILED DESCRIPTION

[0023] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0024] See also Figure 1-3, the utility model embodiment relates to a limiting device for surgical instruments, including a limiting block 5, an elastic spring 7, a locking block 1, a first switch 3, a second switch 4, a screw 2 and a limiting pin 6, a first through hole 8 is correspondingly opened on one side of the limiting block 5 in a longitudinal vertical state, a second through hole 9 is correspondingly opened on the other side of the limiting block 5 in a horizontal horizontal state at a hole position staggered from the first through hole 8, a third through hole 10 is opened on the block of the corresponding limiting block 5 in a connected manner at the middle hole of the side opposite to the direction of the first through hole 8, the second switch 4 is correspondingly placed in the hole cavity of the third through hole 10 and the cross-sectional shape of the head end fixing part thereof is conical, the cross-sectional width of the tail end operating part of the second switch 4 is greater than the aperture of the third through hole 10 and the tail end operating part thereof Placed outside the limit block 5, the position of the second switch 4 in the third through hole 10 is fixed by a limit pin 6 arranged below it, an accommodating cavity is opened in the top block body of the limit block 5 at the upper position of the second through hole 9, and the groove cavity of the accommodating cavity is connected with the first through hole 8 and the external environment, and a locking block 1, a first switch 3 and an elastic spring 7 are arranged in the accommodating cavity, and the elastic spring 7 is arranged in a horizontal state, one end of the elastic spring 7 is fixed to the side wall of the block body of the locking block 1 and the other end is fixed to the side wall of the inner cavity of the limit block 5, a part of the first switch 3 is placed in the accommodating cavity and the other part is placed outside the limit block 5, the first switch 3 and the locking block 1 are fixed together by screws 2, and the head end part of the locking block 1 extends into the first through hole 8.

[0025] The expander instrument is equipped with a limit rod B and a fixed rod A. Several limit devices are placed on the limit rod B in an arbitrary detachable manner, and each limit device is respectively equipped with a fixed rod A in an arbitrary detachable manner. The fixed rod A has a limit groove, and the limit rod B has a rotating groove and a sliding groove.

[0026] The fixing rod A is assembled into the limit device through the first through hole 8. At the position indicated by the first limit point 11, the locking block 1 is pushed forward by the elastic effect of the elastic spring 7. The head end portion of the locking block 1 is interlocked with the limit groove of the fixing rod A to form a fixation. After the second switch 4 enters through the third through hole 10, its conical head end is at the position indicated by the second limit point 12. After the conical head end of the second switch 4 and the sliding groove and the rotating groove on the limit rod B at the position of the second through hole 9 are docked with each other, they are fixed by the limit pin 6 under the second switch 4 to maintain the locked state. Another embodiment is that the third through hole 10 and the second switch 4 have corresponding threads, and the second switch 4 can be screwed in using the threads.

[0027] The working principle of a limiting device for surgical instruments designed in the utility model is as follows: before using the distraction device, the doctor installs the limiting devices on the limiting rod B respectively, and a certain number of limiting devices can be installed on both sides according to needs, one side is selected as the fixed end and the other side is selected as the movable end, and both sides need to be placed in the fixing rod A. When adjusting the limiting device, the second switch 4 needs to be rotated first to keep it in the unlocked state, and the rotation angle and the front-to-back distance can be adjusted at the same time. When it is adjusted to a suitable position, the second switch 4 can be tightened so that the head of the second switch 4 is inserted into the sliding groove and the rotating groove on the limiting rod B at the same time to form a lock; select a suitable fixing rod A, and insert it from the lower end of the first through hole 8 of the limiting device. During the insertion process, the first switch 3 needs to be pulled back to keep it in the unlocked state. After adjusting to the required position, release the first switch 3 to automatically lock; first adjust the required distance of the limiting device at the fixed end on the other side, and put it on the upper end of the bone surface after adjustment, and fix the rod A Insert it from the top of the first through hole 8. There is no need to pull the first switch 3 during insertion. The fixed rod A is inserted into the bone surface position through a tool such as an electric drill. The height can be adjusted by itself, and the position of the limit device can also be appropriately adjusted according to the shape of the bone surface. The adjustment is achieved by unlocking and locking the second switch 4. After the fixed rod A at the fixed end is adjusted in place, the handle of the spreader instrument is manipulated to tighten them against each other. After tightening, the fixed end remains stationary, and the movable end will be stretched outward. During the stretching process, the position of the fixed rod A can also be appropriately adjusted according to actual conditions. When the stretching range of the spreader instrument reaches the specified position, the handle stops tightening. After completing the above operations, an unobstructed space will be formed between the multiple fixed rods A, and the doctor can complete the required surgical operation in this space. After the doctor completes the surgical operation, the first switch 3 at the fixed end is unlocked, and the spreader instrument is directly taken out. The remaining fixed rods A can be pulled out using tools such as an electric drill or other tools.

[0028] The utility model provides a limiting device for a surgical instrument, which can help solve the problem of a large space occupied by the device during surgery, resulting in low efficiency, and meet higher practical use requirements during surgery.

[0029] 1. The limit device has two adjustable switches; the locking block is locked with the limit slot on the fixed rod A, and can be unlocked using the first switch 3; the second switch 4 in the limit device can be locked with the rotating slot and the sliding slot on the limit rod B at the same time, so as to adjust the relative position of the limit device.

[0030] The following design is adopted: two types of locking can be completed on the limit device, and the structure is compact to ensure that the locking structure occupies little space in actual surgery, which is convenient for doctors to avoid the surgical operation being affected by the excessive space occupied by auxiliary instruments during the operation.

[0031] 2. The specific number of the limit devices can be increased or decreased as the surgical requirements increase; the limit device is a system that can be increased or decreased according to the doctor's needs.

[0032] The design is as follows: each limit device is independent, and the doctor can adjust the number according to the required expansion position.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0034] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A limiting device for a surgical instrument, comprising a limiting block (5), an elastic spring (7), a locking block (1), a first switch (3), a second switch (4), a screw (2) and a limiting pin (6), characterized in that: A first through hole (8) is correspondingly provided on one side of the limit block (5) in a longitudinal vertical state, and a second through hole (9) is correspondingly provided on the other side of the limit block (5) in a transverse horizontal state at a hole position offset from the first through hole (8). A third through hole (10) is provided on the block of the corresponding limit block (5) in a connected manner at the middle hole of the second through hole (9) on the side opposite to the direction of the first through hole (8), and the position of the second switch (4) in the third through hole (10) is fixed by a limit pin (6) provided below the third through hole, and an accommodating cavity is provided at the top of the block of the corresponding limit block (5) at the position above the second through hole (9), and the groove of the accommodating cavity is aligned with the first through hole. (8) is connected to the external environment, a locking block (1), a first switch (3) and an elastic spring (7) are arranged in the accommodating cavity, the second switch (4) is correspondingly placed in the hole cavity of the third through hole (10) and the cross-sectional shape of the head end fixing part thereof is conical, the cross-sectional width of the tail end operating part of the second switch (4) is greater than the aperture of the third through hole (10) and the tail end operating part thereof is placed outside the limit block (5), a part of the first switch (3) is placed in the accommodating cavity and the other part thereof is placed outside the limit block (5), the first switch (3) and the locking block (1) are fixed together by a screw (2), and the head end part of the locking block (1) extends into the first through hole (8).

2. A limiting device for surgical instruments according to claim 1, characterized in that: The elastic spring (7) is arranged in a horizontal state, one end of the elastic spring (7) is correspondingly fixed on the side wall of the locking block (1) and the other end is correspondingly fixed on the inner cavity side wall of the limiting block (5).

3. A limiting device for surgical instruments according to claim 2, characterized in that: The expander instrument is equipped with a limit rod B and a fixed rod A. Several limit devices are placed on the limit rod B in an arbitrary detachable manner, and each limit device is respectively equipped with a fixed rod A in an arbitrary detachable manner. The fixed rod A has a limit groove, and the limit rod B has a rotating groove and a sliding groove.

4. A limiting device for surgical instruments according to claim 3, characterized in that: The fixing rod A is assembled into the limiting device through the first through hole (8). At the position indicated by the first limiting point (11), the locking block (1) is pushed forward by the elastic effect of the elastic spring (7). The head end portion of the locking block (1) is locked with the limiting groove of the fixing rod A to form a fixed state. After the second switch (4) enters through the third through hole (10), its conical head end is at the position indicated by the second limiting point (12). After the conical head end of the second switch (4) and the sliding groove and the rotating groove on the limiting rod B at the position of the second through hole (9) are connected with each other, they are fixed by the limiting pin (6) below the second switch (4) to maintain the locked state. The third through hole (10) and the second switch (4) have corresponding threads, and the second switch (4) can be screwed in using the threads.

Images