阅读说明：本技术 拉链头及拉链 (Zipper head and zipper ) 是由 骆燕明 朱松峰 于 2021-08-30 设计创作，主要内容包括：本申请实施例中提供了一种拉链头及拉链。其中,该拉链头包括拉头主体和拉片安装部。拉头主体用于与拉链牙配合,拉链的拉链牙穿设于拉头主体。拉片安装部设置于拉头主体。拉片安装部包括一对爪部,一对爪部的底部连接于拉头主体,一对爪部的顶部相向弯折铆合以形成具有轴孔的拉鼻。爪部包括用于形成轴孔的第一侧壁部和背离第一侧壁部的第二侧壁部,第一侧壁部在轴孔的轴向上的宽度小于第二侧壁部在轴向上的宽度。采用拉链头在铆合时,第一侧壁部、第二侧壁部在折弯位置不会往外起拱而出现折断风险,更加容易铆合,拉链头铆合质量高,成品率高。(The embodiment of the application provides a zipper head and a zipper. Wherein, this draw zipper head includes pull head main part and pulling-on piece installation department. The pull head body is used for being matched with the zipper teeth, and the zipper teeth of the zipper penetrate through the pull head body. The pull piece mounting part is arranged on the pull head main body. The pull tab mounting part comprises a pair of claw parts, the bottoms of the claw parts are connected to the slider body, and the tops of the claw parts are oppositely bent and riveted to form a pull nose with a shaft hole. The claw portion includes a first side wall portion for forming the shaft hole and a second side wall portion facing away from the first side wall portion, and a width of the first side wall portion in an axial direction of the shaft hole is smaller than a width of the second side wall portion in the axial direction. Adopt and draw zipper head when the riveting, first lateral wall portion, second lateral wall portion can not be toward outer arching and the risk of breaking appears in the position of bending, and the riveting is high for easier riveting, draws zipper head riveting quality, and the yield is high.)

1. A slider for slide fastener, comprising:

a slider body (20) for fitting with a fastener element;

the pull tab mounting part (10) is arranged on the slider body (20), the pull tab mounting part (10) comprises a pair of claw parts (11), the bottoms of the claw parts (11) are connected to the slider body (20), and the tops of the claw parts (11) are oppositely bent and riveted to form a pull nose with a shaft hole (12);

the claw part (11) comprises a first side wall part (111) for forming the shaft hole (12) and a second side wall part (112) departing from the first side wall part (111), and the width of the first side wall part (111) in the axial direction of the shaft hole (12) is smaller than that of the second side wall part (112) in the axial direction.

2. The slider according to claim 1, wherein the pawl portion (11) has a T-shaped cross section, the second side wall portion (112) is provided to protrude from the first side wall portion (111) toward both sides in the axial direction, and the first side wall portion (111) is provided to protrude from the second side wall portion (112) toward the shaft hole (12).

3. The slider according to claim 2, wherein the slider (100) further comprises a pull tab (30), the pull tab (30) comprises a shaft portion (31) and a pair of holding arms (32), the shaft portion (31) is rotatably disposed in the shaft hole (12), the pair of holding arms (32) are connected to both ends of the shaft portion (31) and extend in a length direction of the pull tab (30), the claw portion (11) is held between the pair of holding arms (32), and both sides of the second side wall portion (112) in the axial direction abut against the holding arms (32).

4. The slider according to claim 3, wherein each of the pair of holding arms (32) is provided with a holding surface (321) for abutting against the second side wall portion (112), a distance between two oppositely disposed holding surfaces (321) of the pair of holding arms (32) in the axial direction is smaller than a width of the second side wall portion (112) in the axial direction, and the pull tab (30) is made of an elastic material.

5. A slider according to claim 3, wherein the end of each of said holding arms (32) connected to said shaft portion (31) is a connecting end portion (322), said connecting end portion (322) is provided with a mounting wall (3221) for connecting to the shaft portion (31), said shaft portion (31) is connected between two oppositely disposed mounting walls (3221) along said axial direction, said mounting walls (3221) are arranged to protrude radially with respect to said shaft portion (31), said first side wall portion (111) is held between two oppositely disposed mounting walls (3221), the distance between the two mounting walls (3221) is smaller than the width of said first side wall portion (111) along said axial direction, and said pull tab (30) is made of an elastic material.

6. The slider according to claim 4, wherein each of the holding arms (32) further comprises an avoiding groove (323), the avoiding groove (323) is disposed on a side of the holding surface (321) away from the shaft portion (31), and the width of the avoiding groove (323) along the axial direction is greater than the distance between the two oppositely disposed holding surfaces (321) along the axial direction.

7. The slider according to claim 3, wherein the end of each of the gripper arms (32) connected to the shaft portion (31) is a connecting end portion (322), and the connecting end portion (322) includes a first plane (3222) oppositely arranged in the thickness direction of the pull tab (30), a second plane, and an arc-shaped surface (3224) connected to the ends of the first plane (3222) and the second plane.

8. The slider according to claim 3, wherein the radial cross section of both end portions of the shaft portion (31) is semicircular, and the circular portion of the shaft portion (31) faces the clip space (33) between the pair of clip arms (32); alternatively, the axial section of both end portions of the shaft portion (31) is circular in radial cross section.

9. The slider according to claim 3, wherein each of the clip arms (32) is further formed with an elastic relief groove (324) for engaging with the corresponding second side wall portion (112).

10. A slide fastener comprising a pair of fastener tapes having fastener elements and a slider (100) according to any one of claims 1 to 9 for coupling or separating the pair of fastener tapes to or from each other.

Technical Field

The application relates to a zipper technology, in particular to a zipper puller and a zipper.

Background

The zipper is a common article in daily life and is widely applied to articles such as clothes, bags and the like. Generally, a slide fastener includes a fastener tape, fastener elements fixed to the fastener tape, and a slider for coupling and decoupling the fastener elements on two fastener tapes. The zipper head generally comprises a zipper body and a zipper pull, wherein the zipper body is generally made of metal materials, a first riveting end and a second riveting end are arranged on the zipper body, and the first riveting end and the second riveting end are bent after being punched so that the first riveting end and the second riveting end are connected to clamp a transverse shaft of the zipper pull to form a closed zipper nose. The riveting parts of the existing zipper bodies are generally the same in thickness, stress cannot be dispersed in time when the zipper bodies are bent, the conditions of deformation or cracking and the like are easy to occur, and the quality and the yield of zipper sliders are influenced.

Disclosure of Invention

In order to solve one of the above technical drawbacks, embodiments of the present application provide a zipper head and a zipper.

According to a first aspect of embodiments of the present application, there is provided a slider including:

the zipper head body is used for being matched with the zipper teeth;

the pull piece mounting part is arranged on the slider body and comprises a pair of claw parts, the bottoms of the claw parts are connected with the slider body, and the tops of the claw parts are oppositely bent and riveted to form a pull nose with a shaft hole;

the claw portion includes a first side wall portion for forming the shaft hole and a second side wall portion facing away from the first side wall portion, and a width of the first side wall portion in an axial direction of the shaft hole is smaller than a width of the second side wall portion in the axial direction.

Optionally, the cross section of the claw portion is of a T-shaped structure, the second side wall portion protrudes from the first side wall portion towards two sides in the axial direction, and the first side wall portion protrudes from the second side wall portion towards the shaft hole.

Optionally, the zipper head further includes a pull tab, the pull tab includes a shaft portion and a pair of clamping arms, the shaft portion is rotatably disposed in the shaft hole, the pair of clamping arms are connected to two ends of the shaft portion and extend along a length direction of the pull tab, the claw portion is clamped between the pair of clamping arms, and two sides of the second side wall portion along an axial direction abut against the clamping arms.

Optionally, each of the clamping arms is provided with a clamping surface for abutting against the second side wall portion, a distance between the two oppositely arranged clamping surfaces on the pair of clamping arms along the axial direction is smaller than a width of the second side wall portion along the axial direction, and the pull piece is made of an elastic material.

Optionally, each clamping arm is connected with the end portion connected with the shaft portion, the end portion is provided with an installation wall for being connected with the shaft portion, the shaft portion is axially connected between two oppositely-arranged installation walls, the installation wall is radially protruded relative to the shaft portion, the first side wall portion is clamped between the two oppositely-arranged installation walls, the distance between the two installation walls is smaller than the axial width of the first side wall portion, and the pull piece is made of an elastic material.

Optionally, every still be provided with on the centre gripping arm and dodge the groove, dodge the groove set up in the clamping face is kept away from one side of axial part, dodge the groove and follow axial width is greater than two relative settings follow between the clamping face axial distance.

Optionally, an end portion of each of the grip arms connected to the shaft portion is a connection end portion including a first plane, a second plane, and an arc surface connected to end portions of the first plane and the second plane, the first plane and the second plane being arranged opposite to each other in a thickness direction of the pull tab.

Optionally, the radial section of the two end parts of the shaft part is semicircular, and the circular part of the shaft part faces the clamping space between the pair of clamping arms; alternatively, the radial cross section of the end portions at both ends of the shaft portion is circular.

Optionally, each of the clamping arms is further provided with an elastic yielding groove matched with the corresponding second side wall portion.

According to a second aspect of the embodiments of the present application, there is provided a slide fastener including a pair of fastener tapes having fastener elements and a slider as described in any one of the above for coupling or separating the pair of fastener tapes to or from each other.

Adopt the zipper head that provides in this application embodiment, can reach following technological effect at least:

in this application, the width of first lateral wall portion is less than the width of second lateral wall portion in the axial, and the width of first lateral wall portion is littleer for first lateral wall portion is the bending deformation more easily, thereby the riveting more easily, and first lateral wall portion buckles earlier, and the stress of production transmits to second lateral wall portion, thereby is difficult to the rupture when the riveting. The difference in width between the first and second sidewall portions allows for an expandable space to be reserved for the first sidewall portion that deforms more during riveting. Moreover, because the widths of the first side wall part and the second side wall part are different, the first side wall part and the second side wall part can expand towards two sides along the axial direction when being bent, and the first side wall part and the second side wall part cannot interfere with each other, so that the first side wall part and the second side wall part cannot arch outwards at the bending position to cause the risk of breakage. Therefore, the zipper puller has high riveting quality and high yield.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural view of a slider according to an embodiment of the present application, in which a pull tab is not shown and a pair of claw portions are in an un-riveted state;

fig. 2 is a schematic structural view of a slider according to an embodiment of the present application, in which a pull tab is not shown and a pair of claw portions are in a riveted state;

fig. 3 is a schematic side view of a slider according to an embodiment of the present application, in which the pull tab is not shown and the pair of claw portions are in an un-riveted state;

fig. 4 is a schematic perspective view of a zipper slider according to an embodiment of the present application;

fig. 5 is an exploded view of a slider according to an embodiment of the present application;

FIG. 6 is a schematic front view of a pull tab of a zipper pull provided in accordance with one embodiment of the present application;

fig. 7 is a schematic structural view of a pull tab of a zipper slider according to another embodiment of the present application.

Reference numerals

100-a zipper head; 10-a pull tab attachment; 11-a jaw portion; 111-a first sidewall portion; 112-a second sidewall portion; 12-shaft hole; 20-a slider body; 30-a pull tab; 31-a shaft portion; 32-a gripper arm; 321-a clamping surface; 322-connecting the ends; 3221-a mounting wall; 3222-a first plane; 3224-an arc-shaped surface; 323-avoidance slot; 324-an elastic yielding slot; 325-elastic wall; 33-clamping space.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Fig. 1 is a schematic structural view of a slider 100 according to an embodiment of the present application, in which a pull tab 30 is not shown and a pair of claw portions 11 are in an un-riveted state, fig. 2 is a schematic structural view of the slider 100 according to the embodiment of the present application, in which the pull tab 30 is not shown and the pair of claw portions 11 are in a riveted state, and fig. 3 is a schematic side view of the slider 100 according to the embodiment of the present application, in which the pull tab 30 is not shown and the pair of claw portions 11 are in an un-riveted state. To facilitate the staking of the slider 100, according to a first aspect of the embodiments of the present application, as shown in fig. 1-3, there is provided a slider 100, the slider 100 including a slider body 20 and a tab attachment portion 10. The slider body 20 is used for matching with the zipper teeth, and the zipper teeth of the zipper are arranged on the slider body 20 in a penetrating way. The tab attaching portion 10 is provided to the slider body 20. The tab attaching portion 10 includes a pair of claw portions 11, and the bottom portions of the pair of claw portions 11 are connected to the slider body 20, alternatively, the bottom portions of the claw portions 11 are connected. The top parts of the pair of claw parts 11 are oppositely bent and riveted to form a pull nose with a shaft hole 12. In order to increase the caulking quality of the slider 100, the tab attaching portion 10 and the slider body 20 are optionally made of a metal material for facilitating caulking, such as zinc alloy, copper, aluminum alloy, or the like.

The pawl portion 11 includes a first side wall portion 111 for forming the shaft hole 12 and a second side wall portion 112 facing away from the first side wall portion 111, and a width of the first side wall portion 111 in the axial direction of the shaft hole 12 is smaller than a width of the second side wall portion 112 in the axial direction. The width of the claw portion 11 in the axial direction is smaller as it approaches the shaft hole 12.

As shown in fig. 1 and 2, since the first side wall 111 is close to the shaft hole 12 and the second side wall 112 is far from the shaft hole 12, the bending curvature of the first side wall 111 is larger than that of the second side wall 112 at the time of bending and riveting, and the deformation is larger and more likely to occur.

In the present application, the width of the first side wall portion 111 is smaller than the width of the second side wall portion 112 in the axial direction, and the width of the first side wall portion 111 is smaller, so that the first side wall portion 111 is more easily bent and deformed, and is more easily riveted. In the caulking process, the first side wall 111 is bent first, and the generated stress is transmitted to the second side wall 112, so that the snap-off is not easily generated in the caulking process. The difference in width between the first side wall 111 and the second side wall 112 allows for an expandable space for the first side wall 111 to deform more during riveting. Moreover, since the widths of the first side wall portion 111 and the second side wall portion 112 are different, the first side wall portion 111 and the second side wall portion 112 can expand to both sides in the axial direction when being bent, and the first side wall portion 111 and the second side wall portion 112 do not interfere with each other, so that the first side wall portion 111 and the second side wall portion 112 do not arch outward at the bending position and risk of breaking. Therefore, the slider 100 of the present application has high caulking quality and high yield.

In the present application, how the width in the axial direction between the first side wall portion 111 and the second side wall portion 112 changes is not limited, and in an embodiment of the present application, as shown in fig. 1, the cross section of the claw portion 11 has a T-shaped structure, the second side wall portion 112 protrudes from the first side wall portion 111 toward both sides in the axial direction, and the first side wall portion 111 protrudes from the second side wall portion 112 toward the shaft hole 12. Optionally, the first sidewall portion 111 is perpendicular to the second sidewall portion 112.

The second side wall portion 112 can be expanded toward the corner between the first side wall portion 111 and the second side wall portion 112 at the time of caulking, so that stress at the time of caulking is reduced, and the claw portion 11 is prevented from being cracked at the time of caulking.

Moreover, the T-shaped structure has three support bars with three ends, so that a stable three-point support structure can be formed, and after the first side wall portion 111 and the second side wall portion 112 are riveted, the two claw portions 11 mutually form stable supports, so that the strength of the riveted pull nose is improved, and the stable and reliable quality of the zipper head 100 is ensured.

In other embodiments of the present application, the cross section of the claw portion 11 may also form a trapezoidal structure, the width of the claw portion 11 in the axial direction gradually decreases in a direction perpendicular to the axial direction, and the first side wall portion 111 and the second side wall portion 112 are connected by a slope.

In one embodiment of the present application, as shown in fig. 1 and 3, before the pair of claw portions 11 are caulked, the top portions of the claw portions 11 are disposed to face each other with a space therebetween, the bottom portions of the claw portions 11 are connected, and a U-shaped groove is formed between the claw portions 11. After the pair of claw portions 11 are caulked, a U-shaped groove is formed as a shaft hole 12. The bottom of the U-shaped groove is spaced from the upper surface of the slider body 20 by a predetermined distance, thereby preventing the end of the pull-tab 30 from interfering with the upper surface of the slider body 20 when the pull-tab 30 is rotated.

Fig. 4 is a schematic perspective view of a zipper slider 100 according to an embodiment of the present application, fig. 5 is a schematic exploded view of the zipper slider 100 according to an embodiment of the present application, and fig. 6 is a schematic front view of a pull tab 30 of the zipper slider 100 according to an embodiment of the present application, as shown in fig. 4 to 6, in an embodiment of the present application, the zipper slider 100 further includes the pull tab 30. The pull tab 30 includes a shaft portion 31 and a pair of gripper arms 32. The shaft portion 31 is inserted through the shaft hole 12 and rotatably engaged with the shaft hole 12. A pair of gripper arms 32 are connected to both ends of the shaft portion 31 and extend in the longitudinal direction of the pull tab 30. A clamping space 33 is provided between the pair of clamping arms 32, and the claw portion 11 is clamped in the clamping space 33 by the pair of clamping arms 32. Both sides of the second side wall portion 112 in the axial direction abut against the holding arms 32. "resist" the abutment with a certain pressure between the two.

In the process of rotating the pull-tab 30 around the shaft portion 31, since the claw portion 11 is held by the pair of holding arms 32, the frictional force between the claw portion 11 and the holding arms 32 is increased, so that the pull-tab 30 is not shaken up and down, and the pull-tab 30 can be held at an arbitrary angle while rotating around the shaft portion 31. Moreover, the second side wall portion 112 abuts against the holding arm 32 along both sides in the axial direction, so that the pull-tab 30 can be limited along the width of the pull-tab 30, and the pull-tab 30 is prevented from shaking left and right. "left and right" refer to the width direction of the pull tab 30. "Up and down" refers to the length of the pull tab 30.

In another embodiment of the present application, the pull tab 30 may not be provided, and the pull tab may be engaged with a pull string, which is inserted through the shaft hole 12, to open or close the slide fastener by pulling the pull string.

In order to increase the frictional force between the gripping arms 32 and the claw portion 11, in one embodiment of the present application, as shown in fig. 6, each gripping arm 32 is provided with a gripping surface 321 for abutting against the second side wall portion 112. The two oppositely disposed clamping surfaces 321 are abutted against the two sides of the second sidewall 112 in the axial direction in a one-to-one correspondence. The distance in the axial direction between the two oppositely disposed gripping surfaces 321 on the pair of gripper arms 32 is smaller than the width in the axial direction of the second side wall portion 112. In other words, the gripping arm 32 and the claw portion 11 are in interference fit. The pull tab 30 is made of an elastic material, which may be plastic, nylon, resin, rubber, or other elastic material.

Because the pull-tab 30 is made of elastic material, the two clamping arms 32 have certain elasticity, and the distance between the clamping surfaces 321 is smaller than the axial width of the second side wall part 112, so that the clamping arms 32 can clamp the second side wall part 112 by using the elasticity, the clamping force on the second side wall part 112 is increased, the friction force between the clamping arms and the second side wall part is increased, and the pull-tab 30 can be stably kept at any angle without shaking.

To further increase the grip of the gripping arms 32 on the pawl portion 11, in one embodiment of the present application, as shown in fig. 5 and 6, the end of each gripping arm 32 connected to the shaft portion 31 is a connecting end 322. The connecting end portion 322 is provided with a mounting wall 3221 for connecting with the shaft portion 31, and the shaft portion 31 is connected between the two oppositely disposed mounting walls 3221 in the axial direction. The mounting wall 3221 is disposed to protrude radially with respect to the shaft portion 31, the first side wall portion 111 is sandwiched between the two mounting walls 3221 disposed to face each other, and the portion of the mounting wall 3221 protruding radially beyond the shaft portion 31 sandwiches the first side wall portion 111. The distance between the two mounting walls 3221 is smaller than the width of the first side wall portion 111 in the axial direction, in other words, the mounting walls 3221 and the first side wall portion 111 are in interference fit. The pull tab 30 is made of the above-mentioned elastic material such as plastic, nylon, resin, rubber, etc., so that the two holding arms 32 have a certain elasticity.

Since the distance between the two mounting walls 3221 is smaller than the width of the first side wall 111 in the axial direction, the connecting end 322 of the clamping arm 32 can clamp the first side wall 111 by elasticity, so as to increase the clamping force on the first side wall 111 and further increase the friction force therebetween, so that the pull tab 30 can be stably held at any angle without shaking. Moreover, the pull tab 30 not only clamps the second side wall portion 112 by the clamping arm 32, but also clamps the first side wall portion 111 by the connecting end portion 322, and clamps the first side wall portion 111 and the second side wall portion 112 by two positions of the pull tab 30 in the length direction, respectively, so that the pull tab 30 can clamp the claw portion 11 more stably, and further increases the frictional force therebetween, so that the pull tab 30 can be held at any angle more stably without shaking.

In order to prevent the pull tab 30 from interfering with the pull tab nose when rotating around the shaft portion 31, in one embodiment of the present application, as shown in fig. 6, an avoiding groove 323 is further provided on each of the gripping arms 32. The escape groove 323 is provided on a side of the holding surface 321 away from the shaft portion 31, and the width of the escape groove 323 in the axial direction is larger than the distance between the two holding surfaces 321 that are provided opposite to each other in the axial direction.

By providing the escape groove 323, the pull tab 30 does not interfere with the pull tab nose when the pull tab 30 is rotated about the shaft portion 31, and the weight of the pull tab 30 can be reduced.

In a first embodiment of the present application, the connecting end 322 of the clamp arm 32 is a semi-circular or circular structure.

In the second embodiment of the present application, as shown in fig. 5, the end of each of the gripper arms 32 connected to the shaft portion 31 is a connection end 322, and the connection end 322 includes a first plane 3222, a second plane disposed oppositely in the thickness direction of the pull tab 30, and an arc-shaped surface 3224 connected to the ends of the first plane 3222 and the second plane. The surface of the connecting end portion 322 is not completely semicircular or circular, and the first plane 3222 and the second plane may be formed by flattening the upper and lower surfaces of the connecting end portion 322 in the thickness direction, and only a portion of the arc-shaped surface 3224 may be remained, which not only enables the connecting end portion 322 to form the smooth arc-shaped surface 3224, which is not easy to hook, but also helps to reduce the thickness of the pull tab 30.

Since the pull tab 30 does not need to rotate for a full 360 ° around the shaft portion 31, in the first embodiment of the present application, fig. 7 is a schematic structural view of the pull tab 30 of the zipper slider 100 according to another embodiment of the present application, and as shown in fig. 7, the radial cross section of the end portions of the shaft portion 31 is semicircular, and the circular portion of the shaft portion 31 faces the clamping space 33 between the pair of clamping arms 32. In the second embodiment of the present application, as shown in fig. 5 and 6, the radial cross section of both end portions of the shaft portion 31 is circular.

In order to provide a better grip of the tab 30 on the claw portion 11, in one embodiment of the present application, as shown in fig. 6 and 7, each gripping arm 32 is further provided with an elastic relief groove 324. The resilient relief groove 324 mates with the corresponding second sidewall portion. The elastic relief groove 324 penetrates through the holding arm 32 in the thickness direction of the pull tab 30, the elastic relief groove 324 extends in the length direction of the holding arm 32, the side wall of the elastic relief groove 324 on the side close to the claw part 11 is formed into an elastic wall 325, and the elastic wall 325 abuts against the second side wall part 112.

Through setting up elasticity groove 324 of stepping down, can correspondingly reduce the rigidity of centre gripping wall, the centre gripping of elastic wall 325 to second lateral wall portion 112 can produce and is similar to the effect that compression spring supported second lateral wall portion 112, consequently, can avoid because of the extrusion deformation that makes centre gripping arm 32 produce too big, lead to centre gripping arm 32 or claw 11 to produce wearing and tearing in the use, the condition that the clamping performance became invalid and then lead to the pulling-on piece 30 to appear rocking appears.

According to a second aspect of the embodiment of the present application, there is provided a slide fastener including a pair of fastener tapes having fastener elements and the slider 100 provided in any one of the above-described manners for coupling or separating the pair of fastener tapes to or from each other. The fastener elements on the pair of fastener tapes are engageable with each other. When the slider 100 moves up and down along the fastener elements, the zipper is opened or closed. Alternatively, the zipper may be a concealed zipper or a normal zipper, which is not limited in this application.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application.

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 application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.