阅读说明：本技术 一种肋骨接骨板的固定装置 (Fixing device of rib bone fracture plate ) 是由 高武龙 于 2019-12-04 设计创作，主要内容包括：本发明公开了一种肋骨接骨板的固定装置,包括固定钳和紧固机构；固定钳包括本体和安装在本体上的动作组件；紧固机构与接骨板可拆卸连接,紧固机构包括安装部和安装在安装部上的传动组件、第一夹臂和第二夹臂,第一夹臂和第二夹臂相对设置并分别与传动组件连接；传动组件与动作组件连接,并在动作组件的带动下驱动第一夹臂和第二夹臂相对靠近或远离。本发明区别于现有接骨装置的记忆合金抱紧结构,新增了紧固机构,并且对固定钳进行结构上的改进,辅以医学窥镜等,通过固定钳操作置于接骨板上的紧固机构来实现肋骨的加紧,能够将紧固机构的两夹臂调整至最佳夹持位置,适应性广且无需二次调整,提高手术效率。(The invention discloses a fixing device of a rib bone fracture plate, which comprises fixing pliers and a fastening mechanism; the fixed clamp comprises a body and an action assembly arranged on the body; the fastening mechanism is detachably connected with the bone fracture plate and comprises an installation part, a transmission component, a first clamping arm and a second clamping arm, wherein the transmission component, the first clamping arm and the second clamping arm are installed on the installation part; the transmission assembly is connected with the action assembly and drives the first clamping arm and the second clamping arm to be relatively close to or far away from each other under the driving of the action assembly. The invention is different from the memory alloy holding structure of the existing bone-knitting device, adds a fastening mechanism, structurally improves a fixing clamp, is assisted by a medical sight glass and the like, realizes the clamping of the ribs by operating the fastening mechanism arranged on the bone-knitting plate through the fixing clamp, can adjust two clamping arms of the fastening mechanism to the optimal clamping position, has wide adaptability and does not need secondary adjustment, and improves the operation efficiency.)

1. A fixing device of a rib bone fracture plate is characterized by comprising fixing clamps and a fastening mechanism; the fixed clamp comprises a body and an action assembly arranged on the body; the fastening mechanism is detachably connected with the bone fracture plate, the fastening mechanism comprises an installation part, and a transmission assembly, a first clamping arm and a second clamping arm which are installed on the installation part, and the first clamping arm and the second clamping arm are oppositely arranged and are respectively connected with the transmission assembly; the transmission assembly is connected with the action assembly and drives the first clamping arm and the second clamping arm to relatively approach or move away under the driving of the action assembly.

2. The fixation device for a rib bone plate according to claim 1, wherein the action member comprises a first knob, a first gear, a first rack, and a first elastic member;

the first knob is arranged on the body and can slide on the body in a reciprocating manner along a preset direction;

the first gear is arranged in the body and is connected with the first knob;

one part of the first rack is arranged in the body, and the other part of the first rack is positioned outside the body and is meshed with the first gear;

the first elastic piece is arranged in the body and is positioned between the first rack and the body;

the transmission assembly comprises a second rack, a third rack, a second gear and a second elastic piece which are arranged on the mounting part;

the second elastic piece is positioned below the second gear and is respectively connected with the second gear and the mounting part; the first rack and the second rack are respectively positioned at two opposite sides of the second gear;

the second gear comprises a first tooth part, a second tooth part and a third tooth part which are connected in sequence; the first tooth part is connected with the first rack, and the first tooth part is provided with a limiting part which can enable the first rack to press the second gear downwards; the second tooth part is connected with the mounting part;

one end of the second rack is connected with one side of the third tooth part, and the other end of the second rack is connected with the first clamping arm; one end of the third rack is connected with the other side of the third tooth part, and the other end of the third rack is connected with the second clamping arm;

the first rack presses down the second gear to enable the second tooth part to be disconnected with the mounting part and drive the second gear to rotate, so that the rotation of the second gear can drive the first clamping arm and the second clamping arm to be close to or far away from each other.

3. The fixing device for the rib bone plate according to claim 2, wherein the mounting portion is provided with a blind hole, and a first through hole and a second through hole are formed on two opposite sides of the lower portion of the blind hole in an outward expanding manner;

the axial direction of the first through hole and the axial direction of the second through hole are both vertical to the axial direction of the blind hole, and the first through hole and the second through hole are respectively positioned at two sides of the blind hole and are communicated with the blind hole;

the second gear and the second elastic piece are arranged in the blind hole, the blind hole is provided with a fourth tooth part, and the second gear is meshed with the fourth tooth part;

the second elastic piece is arranged at the bottom of the blind hole;

the second rack is inserted in the first through hole, and the second rack is inserted in the second through hole.

4. The fixation device for a rib bone plate according to claim 2, wherein the body comprises a housing, a handle, a connecting cylinder, a first transmission structure and a clamping mechanism;

the handle is connected with the shell;

the connecting cylinder is connected with the shell and can rotate on the shell around the axis of the connecting cylinder; the connecting cylinder is provided with a guide hole, and the first knob is in sliding fit with the guide hole so as to drive the first gear and the first rack to slide along a preset direction

The clamping mechanism is connected with the connecting cylinder;

the first transmission structure is installed in the shell and is in transmission connection with the handle and the clamping mechanism respectively, so that the handle can drive the clamping mechanism to perform clamping action.

5. The fixation device for a rib bone plate according to claim 4, wherein the clamping mechanism comprises a second knob, a second transmission structure, a clamp rod, a rotary joint and a clamp head;

the second knob is inserted into the connecting cylinder and can rotate around the axis of the second knob on the connecting cylinder;

the second transmission structure is arranged in the connecting cylinder and is respectively in transmission connection with the second knob and the clamp rod, so that the second knob drives the clamp rod to rotate through the second transmission structure;

the clamp rod is installed on the connecting cylinder, and the rotary joint is connected with the clamp head and the clamp rod respectively.

6. The fixation device for a rib bone plate according to any one of claims 1 to 5, wherein the mounting portion is snap-fitted to the bone plate.

7. The fixation device for a rib bone plate according to any one of claims 1 to 5, wherein the fastening mechanism is made of a biodegradable material.

Technical Field

The invention relates to the technical field of surgical instruments, in particular to a fixing device for a rib bone fracture plate.

Background

Rib fractures are the most common trauma to the chest, requiring surgical fixation for rib fractures with severe displacement affecting respiratory cycle function. The existing rib bone fracture surgery adopts fixing clamps and a memory alloy bone fracture plate, wherein a plurality of paired encircling arms are arranged on two sides of the memory alloy bone fracture plate, the paired encircling arms form an annular structure with an opening, and the memory alloy bone fracture plate needs to carry out temperature change to realize that the encircling arms encircle ribs in the implantation process, so that the operation is complex; moreover, the deformation stroke of the encircling arm with the structure is determined, the encircling arm cannot be matched with ribs of all patients, and the opening between two opposite encircling arms needs to be opened by structures such as fixing clamps and the like, so that the operation is very inconvenient, and the operation time is prolonged.

Disclosure of Invention

The invention aims to provide a fixing device for a rib bone fracture plate, which aims to solve the problems that the existing bone fracture device is complex in operation, cannot be matched with ribs of all patients, needs to be adjusted for the second time and is long in operation time.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a fixing device of a rib bone fracture plate comprises fixing clamps and a fastening mechanism; the fixed clamp comprises a body and an action assembly arranged on the body; the fastening mechanism is detachably connected with the bone fracture plate, the fastening mechanism comprises an installation part, and a transmission assembly, a first clamping arm and a second clamping arm which are installed on the installation part, and the first clamping arm and the second clamping arm are oppositely arranged and are respectively connected with the transmission assembly; the transmission assembly is connected with the action assembly and drives the first clamping arm and the second clamping arm to relatively approach or move away under the driving of the action assembly.

According to the fixing device of the rib bone fracture plate, which is provided by the invention, the fixing device is different from a memory alloy holding structure of the existing bone fracture device, a fastening mechanism is additionally arranged, the structure of a fixing clamp is improved, a medical sight glass is used as an auxiliary, the rib is fastened by operating the fastening mechanism arranged on the bone fracture plate through the fixing clamp, two clamping arms of the fastening mechanism can be adjusted to the optimal clamping position, the adaptability is wide, secondary adjustment is not needed, and the operation efficiency is improved.

In addition, the fixing device for the rib bone plate according to the above embodiment of the invention may have the following additional technical features:

according to an example of the present invention, the action part includes a first knob, a first gear, a first rack, and a first elastic member;

the first knob is arranged on the body and can slide on the body in a reciprocating manner along a preset direction;

the first gear is arranged in the body and is connected with the first knob;

one part of the first rack is arranged in the body, and the other part of the first rack is positioned outside the body and is meshed with the first gear;

the first elastic piece is arranged in the body and is positioned between the first rack and the body;

the transmission assembly comprises a second rack, a third rack, a second gear and a second elastic piece which are arranged on the mounting part;

the second elastic piece is positioned below the second gear and is respectively connected with the second gear and the mounting part; the first rack and the second rack are respectively positioned at two opposite sides of the second gear;

the second gear comprises a first tooth part, a second tooth part and a third tooth part which are connected in sequence; the first tooth part is connected with the first rack, and the first tooth part is provided with a limiting part which can enable the first rack to press the second gear downwards; the second tooth part is connected with the mounting part;

one end of the second rack is connected with one side of the third tooth part, and the other end of the second rack is connected with the first clamping arm; one end of the third rack is connected with the other side of the third tooth part, and the other end of the third rack is connected with the second clamping arm;

the first rack presses down the second gear to enable the second tooth part to be disconnected with the mounting part and drive the second gear to rotate, so that the rotation of the second gear can drive the first clamping arm and the second clamping arm to be close to or far away from each other.

According to one example of the invention, the mounting part is provided with a blind hole, and a first through hole and a second through hole are formed on two opposite sides of the lower part of the blind hole in an outward expanding mode;

the axial direction of the first through hole and the axial direction of the second through hole are both vertical to the axial direction of the blind hole, and the first through hole and the second through hole are respectively positioned at two sides of the blind hole and are communicated with the blind hole;

the second gear and the second elastic piece are arranged in the blind hole, the blind hole is provided with a fourth tooth part, and the second gear is meshed with the fourth tooth part;

the second elastic piece is arranged at the bottom of the blind hole;

the second rack is inserted in the first through hole, and the second rack is inserted in the second through hole.

According to one example of the invention, the body comprises a housing, a handle, a connecting cylinder, a first transmission structure and a clamping mechanism;

the handle is connected with the shell;

the connecting cylinder is arranged on the shell and can rotate around the axis of the connecting cylinder; the connecting cylinder is provided with a guide hole, and the first knob is in sliding fit with the guide hole so as to enable the knob to drive the first gear and the first rack to slide along a preset direction;

the clamping mechanism is connected with the connecting cylinder;

the first transmission structure is installed in the shell and is in transmission connection with the handle and the clamping mechanism respectively, so that the handle can drive the clamping mechanism to perform clamping action.

According to one example of the invention, the clamping mechanism comprises a second knob, a second transmission structure, a clamp rod, a rotary joint and a clamp head;

the second knob is inserted into the connecting cylinder and can rotate around the axis of the second knob on the connecting cylinder;

the second transmission structure is arranged in the connecting cylinder and is respectively in transmission connection with the second knob and the clamp rod, so that the second knob drives the clamp rod to rotate through the second transmission structure;

the clamp rod is installed on the connecting cylinder, and the rotary joint is connected with the clamp head and the clamp rod respectively.

According to one example of the present invention, the mounting portion is snap-fit to the bone plate.

According to one example of the invention, the fastening means is made of a biodegradable material.

Advantages of the above additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic view of a fixation device for a rib plate according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an actuator assembly according to an embodiment of the present invention;

FIG. 3 is a schematic view of a part of the internal structure of the housing according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of a fastening mechanism according to an embodiment of the present invention;

fig. 5 is a sectional view taken along line a-a of fig. 4.

In the drawings, the components represented by the respective reference numerals are listed below:

1. fixing the pliers; 11. an action component; 111. a first knob; 112. a first gear; 113. a first rack; 114. a first elastic member; 12. a housing; 13. a handle; 14. a connecting cylinder; 15. a clamping mechanism; 151. a second knob; 152. a clamp lever; 153. a rotary joint; 154. a binding clip;

2. a fastening mechanism; 21. an installation part; 211. blind holes; 2111. a fourth tooth portion; 212. a first through hole; 213. a second through hole; 22. a transmission assembly; 221. a second rack; 222. a third rack; 223. a second gear; 2231. a first tooth portion; 2232. a second tooth portion; 2233. a third tooth portion; 224. a second elastic member; 23. a first clamp arm; 24. a second clamp arm; 25. a clamping jaw.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1-5, the present embodiment provides a fixing device for a rib bone plate, which comprises a fixing clamp 1 and a fastening mechanism 2; the fixing device of this embodiment firstly improves the structure of the fixing clamp 1, and adds the action component 11 on the body of the original fixing clamp 1, so that the fixing clamp 1 can be matched with the fastening mechanism 2 except for the clamping function, and the first clamping arm 23 and the second clamping arm 24 of the fastening mechanism 2 can be actuated through the action of the fixing clamp 1.

The fastening mechanism 2 of this embodiment is detachably connected with a bone plate (not shown in the drawings), the fastening mechanism 2 includes a mounting portion 21, and a transmission assembly 22, a first clamping arm 23 and a second clamping arm 24 which are mounted on the mounting portion 21, the mounting portion 21 of this embodiment may be a strip-shaped plate structure with a certain length, preferably, the fastening mechanism 2 of this embodiment is connected with the bone plate in a clamping manner, and correspondingly, the bone plate is required to be provided with structures such as a clamping groove which is matched with the mounting portion, so as to connect the mounting portion 21 with the bone plate.

The first clamping arm 23 and the second clamping arm 24 of the present embodiment are oppositely disposed and respectively connected to the transmission assembly 22; the first clamping arm 23 and the second clamping arm 24 are both provided with a plurality of clamping jaws 25, so that the bone fracture plate needs to be improved in adaptability, the bone fracture plate is provided with a plurality of structures such as grooves or holes for the reciprocating motion of the clamping jaws 25, and the structures of the first clamping arm 23 and the second clamping arm 24 are shown in the attached drawings, so that the structures such as the clamping grooves and the grooves are arranged on the bone fracture plate, and the structures are easily thought of, and the structures are not illustrated in the attached drawings.

The transmission assembly 22 of the present embodiment is connected to the action assembly 11, and drives the first clamping arm 23 and the second clamping arm 24 to move closer to or away from each other under the driving of the action assembly 11, and specific connection and action modes are given below.

As can be seen from the above description, the fixing device for a rib bone fracture plate of the present embodiment is different from the memory alloy holding structure of the existing bone fracture device, the fastening mechanism 2 is additionally provided, the fixing forceps 1 is structurally improved, the medical speculum is used as an auxiliary, the rib is fastened by operating the fastening mechanism 2 arranged on the bone fracture plate through the fixing forceps 1, the two clamping arms of the fastening mechanism 2 can be adjusted to the optimal clamping position, the adaptability is wide, secondary adjustment is not needed, and the operation efficiency is improved.

As shown in fig. 2 and 3, the actuating member of the present embodiment includes a first knob 111, a first gear 112, a first rack 113, and a first elastic member 114; wherein, the first knob 111 of the embodiment is installed on the body and can slide on the body back and forth along a preset direction; the first gear 112 of the present embodiment is installed in the body and connected with the first knob 111 to realize the synchronous rotation of the first knob 111 and the first gear 112; the first rack 113 of this embodiment is partially installed in the body, and the other part is located outside the body and engaged with the first gear 112; the first elastic member 114 of this embodiment is installed in the body and located between the first rack 113 and the body, and drives the first gear 112 and the first rack 113 to descend by pressing down the first knob 111, so as to drive the subsequent second gear 223 to descend, and after the second gear 223 completes the action, the first elastic member 114 is used for the first rack 113, the first gear 112 and the first knob 111 to recover to the initial state. The specific actions performed by the second gear 223 as described herein will be described below.

As shown in fig. 4 and 5, in order to achieve the engagement with the actuating assembly 11 and the clamping of the rib, the transmission assembly 22 of the present embodiment specifically includes a second rack 221, a third rack 222, a second gear 223, a second elastic member 224, and the like, which are mounted on the mounting portion 21.

The second elastic member 224 of the present embodiment is located below the second gear 223 and is respectively connected to the second gear 223 and the mounting portion 21, so that when the first rack 113 presses down the second gear 223, the second gear 223 can return to the initial position through the second elastic member 224; the first rack 113 and the second rack 221 are located on opposite sides of the second gear 223 in the length direction of the bone plate or mounting portion 21, i.e., the length direction of the first rack 113 and the second rack 221 is perpendicular to the length direction of the mounting portion 21 and the bone plate.

Specifically, the second gear 223 of the present embodiment includes a first tooth portion 2231, a second tooth portion 2232, and a third tooth portion 2233 connected in sequence; the first tooth portion 2231 is connected to the first rack 113, and the first tooth portion 2231 is provided with a limiting portion that enables the first rack 113 to press down the second gear 223, that is, the limiting portion is located below the first rack 113; the second tooth portion 2232 is connected to the mounting portion 21.

In this embodiment, one end of the second rack 221 is connected to one side of the third tooth 2233, and the other end is connected to the first clamping arm 23; in this embodiment, one end of the third rack 222 is connected to the other side of the third tooth 2233, and the other end is connected to the second clamping arm 24.

When the ribs need to be held tightly, the first rack 113 is slid to press down the second gear 223, so that the second gear 2232 is disengaged from the mounting portion 21, and the second gear 223 is driven to rotate, and since the second rack 221 and the third rack 222 are respectively located at two opposite sides of the second gear 223 and are meshed with the second gear 223, the second gear 223 can be driven to rotate to drive the second rack 221 and the third rack 222 to move on the mounting portion 21, and further drive the first clamping arm 23 and the second clamping arm 24 to approach or leave.

Specifically, as shown in fig. 4 and 5, in order to ensure the stability of the overall structure, the mounting portion 21 of the present embodiment is provided with a blind hole 211, and the lower portion of the blind hole 211 is outwardly expanded to form a first through hole 212 and a second through hole 213; in the embodiment, the axial direction of the first through hole 212 and the axial direction of the second through hole 213 are both perpendicular to the axial direction of the blind hole 211, and the first through hole 212 and the second through hole 213 are both communicated with the blind hole 211, and three holes can be understood as a single-hole structure having a vertical blind hole 211 and two horizontal through holes in the figure. The second rack 221 of this embodiment is inserted into the first through hole 212, and the second rack 221 is inserted into the second through hole 213.

The second gear 223 and the second elastic member 224 of the present embodiment are installed in the blind hole 211, and a fourth tooth portion 2111 is provided on a side wall of the blind hole 211, that is, the second tooth portion 2232 of the second gear 223 is engaged with the fourth tooth portion 2111 of the installation portion 21; the second elastic member 224 of this embodiment is installed at the bottom of the blind hole 211, so that the second gear 223 can be conveniently restored to the initial position after being pressed down, the second tooth 2232 is kept engaged with the fourth tooth 2111, the second rack 221 and the third rack 222 are locked, and further the first clamping arm 23 and the second clamping arm 24 are locked, and the positions of the two opposite clamping jaws 25 are fixed.

The body of the present embodiment comprises a housing 12, a handle 13, a connecting cylinder 14, a first transmission structure (not shown in the figure) and a clamping mechanism 15; wherein, the handle 13 is connected with the shell 12; the connecting cylinder 14 of the present embodiment is connected to the housing 12 and communicates with the inside of the housing, and the connecting cylinder 14 is rotatable on the housing 12 about its axis.

In this embodiment, the first knob 111 is also installed on the connecting cylinder 14, in order to realize that the first knob 111 can slide on the body in a reciprocating manner, a guide hole is formed in the connecting cylinder 14 in this embodiment, and the first knob 111 is in sliding fit with the guide hole, so that the knob drives the first gear 112 and the first rack 113 to slide along a preset direction.

The first transmission structure of the embodiment is installed in the housing 12 and the connecting cylinder 14, and is in transmission connection with the handle 13 and the clamping mechanism 15, respectively, so that the handle 13 can drive the clamping mechanism 15 to perform a clamping action. The first transmission structure may be any structure capable of transmitting the motion of the handle 13 to the clamping mechanism 15 for clamping in the prior art, such as a pull rope or a pull rod, which are commonly used in the prior art, and the embodiment does not describe the first transmission structure because the conventional technical means can be known by those skilled in the art.

In addition, in order to facilitate the installation of the bone plate, the present embodiment further improves the clamping mechanism 15, and as shown in fig. 1, the clamping mechanism 15 of the present embodiment includes a second knob 151, a second transmission structure, a clamping rod 152, a rotary joint 153, and a clamping head 154; wherein the binding clip 154 is connected with the first transmission structure, the second knob 151 is inserted on the connecting cylinder 14 and can rotate around the axis of the connecting cylinder 14; the second transmission structure is installed in the connecting cylinder 14 and is respectively in transmission connection with the second knob 151 and the forceps rod 152, so that the second knob 151 drives the forceps rod 152 to rotate through the second transmission structure; the clamp lever 152 is mounted on the connecting cylinder 14, and the rotary joint 153 is connected to the clamp head 154 and the clamp lever 152, respectively. The clamping mechanism 15 can rotate freely and perform bending action in a small range, so that the bone fracture plate is convenient to mount, and the operation efficiency is improved.

Specifically, the second transmission structure of the present embodiment may be a miniature worm and gear structure, or a rack and pinion transmission structure, and since the above structure has been shown in the accompanying drawings to provide a rack and pinion transmission structure, the present embodiment does not describe the rack and pinion transmission here, and those skilled in the art can refer to other drawings of the present application to obtain the present invention.

Based on the above structure, the present embodiment also selects the material of the fastening mechanism 2 and the bone plate as biodegradable material, such as the existing biodegradable ceramics and biodegradable plastics, and for the second elastic member 224 that needs to have a certain elasticity, the biodegradable high elastic fiber material can be selected. In addition, since the application range of the fastening mechanism 2 of the present application is an operation, the machining of the fastening mechanism 2 generally employs a micromachining technique.

In order to facilitate the understanding of the fixing device for a rib bone plate according to the present embodiment, the following is a brief description of the operation process thereof:

firstly, the mounting part 21 of the fastening mechanism 2 is connected with the bone fracture plate to be fixed, the bone fracture plate is provided with grooves, holes and other structures, so that the bone fracture plate can be combined with the fastening mechanism 2 into a good whole, and the whole formed by the fastening mechanism 2 and the bone fracture plate is clamped and adjusted through the clamping mechanism 15 of the fixing clamp 1, so that the bone fracture plate can cover the rib fracture part.

The exposed end of the first rack 113 is then coupled with the first tooth portion 2231 of the second gear 223, and ensures the first rack 113 to be matched with the limit part, slides the first knob 111, presses down the second gear 223 through the limit part, the second tooth portion 2232 of the second gear 223 is disengaged from the fourth tooth portion 2111 of the mounting portion 21, so that the second gear 223 can be rotated by rotating the first knob 111, thereby completing the movement of the second rack 221 and the third rack 222, driving the first clamping arm 23 and the second clamping arm 24 to approach or separate from each other, completing the precise fastening and clamping of the ribs, and the transmission structures such as the first knob 111, the first rack 113 and the second gear 223 are convenient for adjusting the fastening force of the clamping jaw 25 to the rib, the fastening force can be finely adjusted, and the fine adjustment stage number is determined by the tooth numbers of the first gear 112, the second gear 223, the second rack 221 and the third rack 222.

The whole process needs to be realized by assisting with visual devices such as medical lenses, the operation is convenient, the fastening of ribs and the fine adjustment of fastening force are realized by a pure mechanical structure, the bone fracture plate and the like do not need to be heated, and the applicability of a patient is far greater than that of the existing memory alloy bone fracture plate structure.

In the description of the present invention, it is to be understood that the terms "inside", "outside", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.