Instrument handle and ligation device

Abstract

The utility model provides a kind of instrument handle and ligation device, it is related to medical instrument technical field.The instrument handle includes pedestal, pivot, rotating drum and bearing;Pedestal is equipped with bearing mounting hole, and the inboard wall of bearing mounting hole is equipped with first circumferential limiting part;Bearing outer ring is equipped with special-shaped part, and bearing is installed in bearing mounting hole, special-shaped part cooperates first circumferential limiting part, and makes outer ring relative to pedestal circumferential limit;Rotating drum is installed on pivot, and pivot passes through pedestal, and cooperates with bearing inner ring.The longitudinal pedestal and bearing are different due to temperature reduction radial dimension shrinkage, also can not lead to pedestal cracking problem, also can effectively alleviate the technical problem that pedestal and bearing are loose in bearing mounting hole due to temperature rise, improve the reliability and stability of instrument handle.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a device handle and ligation device. Background Technology

[0002] Medical devices such as ligators require a special handle for thread winding during operation. Their working principle involves winding the thread around a rotating drum, and the tightening of the thread drives the working end of the device to perform the corresponding action. To ensure smooth drum operation, bearings are typically used as rotating support components. Due to the difference in material properties between the bearing and the polymer base, they exhibit different coefficients of thermal expansion with temperature changes. This necessitates that the bearing be fixed to the base mounting hole using an interference fit. However, this design has significant technical drawbacks: at low temperatures, the base is prone to cracking due to stress concentration from shrinkage; while at high temperatures, the bearing may loosen due to the difference in expansion between the bearing and the base. Utility Model Content

[0003] The purpose of this invention is to provide an instrument handle and a ligation device to alleviate the technical problems of easy bearing loosening and easy base cracking in the instrument handles of the prior art.

[0004] In the first aspect, the instrument handle provided by this utility model includes: a base, a rotating shaft, a rotating cylinder, and a bearing; The base is provided with a bearing mounting hole, and the inner sidewall of the bearing mounting hole is provided with a first circumferential limiting part; The bearing outer ring is provided with a special-shaped part, and the bearing is installed in the bearing mounting hole. The special-shaped part cooperates with the first circumferential limiting part and limits the bearing outer ring circumferentially relative to the base. The rotating drum is mounted on the rotating shaft, which passes through the base and mates with the inner ring of the bearing.

[0005] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the first circumferential limiting portion includes a plurality of first limiting portions spaced circumferentially along the bearing mounting hole, and the irregular portion includes second limiting portions spaced circumferentially along the bearing. One of the first limiting part and the second limiting part is configured as a protrusion and the other is configured as a groove adapted to the protrusion. The plurality of first limiting parts correspond one-to-one with the plurality of second limiting parts.

[0006] In conjunction with the first aspect, this utility model provides a second possible implementation of the first aspect, wherein a stop portion is provided at the end of the bearing mounting hole opposite to the rotating drum, and the bearing is located between the stop portion and the rotating drum.

[0007] In conjunction with the first aspect, this utility model provides a third possible implementation of the first aspect, wherein the rotating shaft has a first shaft segment, a second shaft segment, and a third shaft segment arranged sequentially along the axial direction; The rotating shaft is axially slidably fitted to the rotating cylinder and the bearing, and the rotating cylinder is fitted to the third shaft segment, wherein the first shaft segment and the second shaft segment are selectively fitted to the bearing; With the first shaft segment fitted to the bearing, the first shaft segment and the inner ring of the bearing are in clearance fit. With the second shaft section fitted to the bearing, the second shaft section is in an interference fit with the inner ring of the bearing.

[0008] In conjunction with the third possible implementation of the first aspect, this utility model provides a fourth possible implementation of the first aspect, wherein the inner ring of the bearing is provided with a plurality of inner protrusions, and the plurality of inner protrusions are spaced apart along the circumference of the bearing.

[0009] In conjunction with the third possible implementation of the first aspect, this utility model provides a fifth possible implementation of the first aspect, wherein the third shaft segment is provided with a second circumferential limiting part adapted to the rotating drum.

[0010] In conjunction with the fifth possible implementation of the first aspect, this utility model provides a sixth possible implementation of the first aspect, wherein the length of the second circumferential limiting portion in the axial direction of the rotating shaft is greater than the length of the second shaft segment.

[0011] In conjunction with the third or sixth possible implementation of the first aspect, this utility model provides a seventh possible implementation of the first aspect, wherein the length of the first shaft segment is greater than or equal to the length of the second shaft segment.

[0012] In conjunction with the seventh possible implementation of the first aspect, this utility model provides an eighth possible implementation of the first aspect, wherein a limiting end cap is installed at the end of the first shaft segment opposite to the second shaft segment.

[0013] Secondly, the ligation device provided by this utility model is equipped with the instrument handle described in the first aspect.

[0014] The present invention provides the following beneficial effects: A base with a bearing mounting hole is used, the inner wall of which has a first circumferential limiting part. The outer ring of the bearing has a shaped part, and the bearing is mounted in the bearing mounting hole. The shaped part cooperates with the first circumferential limiting part, thus circumferentially limiting the outer ring of the bearing relative to the base. A rotating cylinder is mounted on a rotating shaft, which passes through the base and mates with the inner ring of the bearing. The outer ring of the bearing does not need to be interference-fitted with the bearing mounting hole. Even if there is a difference in radial dimension shrinkage between the base and the bearing due to temperature reduction, it will not cause the base to crack. Furthermore, it effectively alleviates the technical problem of the bearing easily loosening in the bearing mounting hole due to temperature rise, thus improving the reliability and stability of the instrument handle.

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the instrument handle provided in an embodiment of this utility model; Figure 2 A cross-sectional view of the instrument handle provided in an embodiment of this utility model; Figure 3 A schematic diagram of the base of the instrument handle provided in this embodiment of the utility model; Figure 4 A front view of the bearing of the instrument handle provided in an embodiment of this utility model; Figure 5 A schematic diagram of the rotating shaft and knob of the instrument handle provided in this embodiment of the utility model.

[0018] Icons: 100-Base; 101-Bearing mounting hole; 102-First circumferential limiting part; 103-Stop part; 200-Rotating shaft; 210-First shaft section; 220-Second shaft section; 230-Third shaft section; 231-Second circumferential limiting part; 300-Rotating cylinder; 400-Bearing; 401-Irregular part; 500-Limiting end cap; 600-Knob. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are only used to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the instrument handle provided in this embodiment of the present invention includes: a base 100, a rotating shaft 200, a rotating cylinder 300, and a bearing 400; the base 100 is provided with a bearing mounting hole 101, and the inner side wall of the bearing mounting hole 101 is provided with a first circumferential limiting part 102; the outer ring of the bearing 400 is provided with a shaped part 401, and the bearing 400 is installed in the bearing mounting hole 101, the shaped part 401 cooperates with the first circumferential limiting part 102, and the outer ring of the bearing 400 is circumferentially limited relative to the base 100; the rotating cylinder 300 is installed on the rotating shaft 200, the rotating shaft 200 passes through the base 100 and cooperates with the inner ring of the bearing 400.

[0023] In this embodiment, both the first circumferential limiting part 102 and the irregular part 401 adopt a non-circular structure in the circumferential direction of the bearing 400. By cooperating with the first circumferential limiting part 102 and the irregular part 401, the outer ring of the bearing 400 is circumferentially limited relative to the bearing mounting hole 101. Therefore, it is not necessary to use an interference fit to assemble the bearing 400 into the bearing mounting hole 101. While ensuring the stable installation of the bearing 400, it also reduces the risk of cracking caused by the base 100 being radially supported by the bearing 400 in low-temperature environments.

[0024] In this embodiment of the present invention, the first circumferential limiting part 102 includes a plurality of first limiting parts spaced apart circumferentially along the bearing mounting hole 101, and the irregular part 401 includes a second limiting part spaced apart circumferentially along the bearing 400; one of the first limiting part and the second limiting part is configured as a protrusion and the other is configured as a groove adapted to the protrusion, and the plurality of first limiting parts are correspondingly matched with the plurality of second limiting parts.

[0025] The protrusion can be configured as a semi-cylindrical structure, with the axis of the semi-cylindrical structure parallel to the axis of the bearing mounting hole 101. Multiple first limiting portions are provided circumferentially along the bearing mounting hole 101, and each of the first limiting portions corresponds to and engages with multiple second limiting portions, thereby ensuring that the outer ring of the bearing 400 is stably and circumferentially positioned relative to the bearing mounting hole 101. Furthermore, the engagement of the protrusion and the groove increases the contact area between the outer ring of the bearing 400 and the base 100, further enhancing the stability of the bearing 400.

[0026] See Figure 2 and Figure 3 The bearing mounting hole 101 is provided with a stop part 103 at one end away from the rotating drum 300, and the bearing 400 is located between the stop part 103 and the rotating drum 300.

[0027] The base 100 may be provided with two support parts, through which the rotating shaft 200 passes and axially limits the rotating cylinder 300 between the two support parts. Additionally, the bearing 400 is located between the stop part 103 and the rotating cylinder 300. One end of the bearing 400 is limited by the stop part 103, and the other end is limited by the rotating cylinder 300, thereby preventing axial sliding of the bearing 400 and preventing it from slipping out of the bearing mounting hole 101.

[0028] like Figure 2 and Figure 5As shown, the rotating shaft 200 has a first shaft section 210, a second shaft section 220, and a third shaft section 230 arranged sequentially along the axial direction. The rotating shaft 200 is slidably fitted to the rotating cylinder 300 and the bearing 400 along the axial direction, and the rotating cylinder 300 is fitted to the third shaft section 230. The first shaft section 210 and the second shaft section 220 are selectively fitted to the bearing 400. When the first shaft section 210 is fitted to the bearing 400, the first shaft section 210 and the inner ring of the bearing 400 are in clearance fit. At this time, the first shaft section 210 can rotate relative to the inner ring of the bearing 400, and the bearing 400 does not participate in the rotational lubrication. When the second shaft section 220 is fitted to the bearing 400, the second shaft section 220 and the inner ring of the bearing 400 are in interference fit. At this time, the bearing 400 provides lubrication for the rotation of the rotating shaft 200 relative to the base 100.

[0029] In an optional embodiment, the bearing 400 can be a bidirectional rotary bearing or a unidirectional bearing with a unidirectional rotation limiting function. When the first shaft section 210 is clearance-fitted with the inner ring of the bearing 400, the shaft 200 can rotate bidirectionally; when the first shaft section 210 is interference-fitted with the inner ring of the bearing 400, the shaft 200 can only rotate unidirectionally together with the inner ring of the bearing 400.

[0030] See Figure 2 , Figure 4 and Figure 5 As shown, the inner ring of the bearing 400 is provided with multiple inner protrusions 402, which are spaced apart circumferentially along the bearing 400. The second shaft segment 220 is interference-fitted within the space enclosed by the multiple inner protrusions 402. The diameter of the first shaft segment 210 is slightly smaller than that of the second shaft segment 220. When the rotating shaft 200 slides axially until the first shaft segment 210 is located inside the bearing 400, all the inner protrusions 402 are clearance-fitted with the first shaft segment 210.

[0031] See Figure 2 and Figure 5 The third shaft segment 230 is provided with a second circumferential limiting part 231 adapted to the rotating drum 300. The second circumferential limiting part 231 can be configured as a spline, flat key or other structure; the second circumferential limiting part 231 can also be configured as a plane perpendicular to one of the radial lines of the third shaft segment 230; or the third shaft segment 230 can be configured as a polygonal columnar structure in a cross section perpendicular to the axis, thereby forming the second circumferential limiting part 231 on the side of the third shaft segment 230.

[0032] The projection of the second shaft segment 220 onto a plane perpendicular to the axis is located inside the projection of the third shaft segment 230 onto that plane. When the first shaft segment 210 slides to the inside of the bearing 400, the second shaft segment 220 can slide into the shaft hole of the rotating drum 300.

[0033] Furthermore, the length of the second circumferential limiting portion 231 in the axial direction of the rotating shaft 200 is greater than the length of the second shaft segment 220. When the first shaft segment 210 slides to the inside of the bearing 400, although the second shaft segment 220 enters the shaft hole of the rotating cylinder 300, a portion of the second circumferential limiting portion 231 still engages with the rotating cylinder 300, thereby maintaining the circumferential limitation of the rotating cylinder 300 relative to the rotating shaft 200.

[0034] In addition, to ensure that the first shaft segment 210 slides to the inside of the bearing 400 so that the second shaft segment 220 can be completely disengaged from the bearing 400, the length of the first shaft segment 210 should be greater than or equal to the length of the second shaft segment 220. Preferably, the length of the first shaft segment 210 should be slightly greater than the length of the second shaft segment 220.

[0035] like Figure 1 and Figure 2 As shown, a limiting end cap 500 can be installed at the end of the first shaft segment 210 away from the second shaft segment 220. The diameter of the limiting end cap 500 is larger than the inner diameter of the stop portion 103, so as to prevent the shaft 200 from slipping axially when the first shaft segment 210 is fitted inside the bearing 400.

[0036] In addition, a knob 600 can be fixedly installed on the rotating shaft 200, and an easy-to-grip anti-slip structure can be configured along the circumference of the knob 600, so that the knob 600 can be manually rotated to drive the rotating shaft 200 and the rotating drum 300 to rotate.

[0037] The ligator provided in this embodiment of the utility model is equipped with the instrument handle described in the above embodiments. The ligator has the technical advantages of the instrument handle described above, which will not be repeated here.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An instrument handle, characterized by include: Base (100), shaft (200), drum (300) and bearing (400); The base (100) is provided with a bearing mounting hole (101), and the inner sidewall of the bearing mounting hole (101) is provided with a first circumferential limiting part (102). The bearing (400) has a shaped part (401) on its outer ring, and the bearing (400) is installed in the bearing mounting hole (101). The shaped part (401) cooperates with the first circumferential limiting part (102) and limits the outer ring of the bearing (400) circumferentially relative to the base (100). The rotating drum (300) is mounted on the rotating shaft (200), which passes through the base (100) and engages with the inner ring of the bearing (400).

2. An instrument handle according to claim 1, wherein, The first circumferential limiting part (102) includes a plurality of first limiting parts spaced circumferentially along the bearing mounting hole (101), and the irregular part (401) includes second limiting parts spaced circumferentially along the bearing (400); One of the first limiting part and the second limiting part is configured as a protrusion and the other is configured as a groove adapted to the protrusion. The plurality of first limiting parts correspond one-to-one with the plurality of second limiting parts.

3. An instrument handle according to claim 1, wherein, The bearing mounting hole (101) is provided with a stop (103) at one end away from the rotating cylinder (300), and the bearing (400) is located between the stop (103) and the rotating cylinder (300).

4. The instrument handle of claim 1, wherein, The rotating shaft (200) has a first shaft segment (210), a second shaft segment (220) and a third shaft segment (230) arranged sequentially along the axial direction. The rotating shaft (200) is axially slidably fitted to the rotating cylinder (300) and the bearing (400), and the rotating cylinder (300) is fitted to the third shaft segment (230), wherein the first shaft segment (210) and the second shaft segment (220) are selectively fitted to the bearing (400); With the first shaft segment (210) engaged with the bearing (400), the first shaft segment (210) and the inner ring of the bearing (400) are in clearance engagement. With the second shaft segment (220) fitted to the bearing (400), the second shaft segment (220) and the inner ring of the bearing (400) are in an interference fit.

5. An instrument handle according to claim 4, wherein, The bearing (400) has a plurality of inner protrusions (402) on its inner ring, and the plurality of inner protrusions (402) are arranged at intervals along the circumference of the bearing (400).

6. An instrument handle according to claim 4, wherein, The third shaft section (230) is provided with a second circumferential limiting part (231) adapted to the rotating drum (300).

7. An instrument handle according to claim 6, wherein, The length of the second circumferential limiting portion (231) in the axial direction of the rotating shaft (200) is greater than the length of the second shaft segment (220).

8. An instrument handle according to any one of claims 4 to 7, wherein, The length of the first shaft segment (210) is greater than or equal to the length of the second shaft segment (220).

9. An instrument handle according to claim 8, wherein, A limit cap (500) is installed on the end of the first shaft segment (210) away from the second shaft segment (220).

10. A ligator characterized by, The ligator is equipped with the instrument handle as described in any one of claims 1 to 9.

Images