TWM519692U - Linear slide retainer - Google Patents

Description

Linear slide and its holder

This creation relates to a kind of slide rail, and in particular to a linear slide rail and a retainer thereof.

Due to the continuous development and improvement of precision feed systems, linear drive technology and its products have become the most important part of many precision machines. A wide range of linear mechanism products have been widely used in human life, processing plants and high-tech equipment. Inside, for example, linear slides; although the development of linear mechanism technology is very rapid, consumer users still need continuous improvement of technology, so there are still many problems to be developed, and related technology industries are actively developing and can effectively improve. Various new creations and new inventions of linear institutions. The linear slide rail mainly comprises a guide rail, a slide sleeve sliding on the guide rail, and the slide member is provided with a rolling element relative to the rolling surface of the guide rail and between the slide rail and the slider (can be divided into Both the chained and non-chained versions, a circulating module that allows the rolling elements to circulate indefinitely, two end caps mounted on both ends of the slider, and a retainer for maintaining the rolling elements in a specific position.

In practical applications, when the slider slides on the guide rail, external dust or fine dirt is easily entered between the guide rail and the slider, thereby causing uneven sliding between the slider and the guide rail. Therefore, some manufacturers will additionally install relevant dustproof members on the retainer. However, the dustproof members currently provided on the retainer are not only troublesome to manufacture but also difficult to install. Therefore, the creator feels that the above-mentioned deficiencies can be improved. He has devoted himself to researching and cooperating with the application of theory, and finally proposed a creation that is reasonable in design and effective in improving the above-mentioned defects.

The present embodiment is directed to providing a linear slide rail and a retainer thereof, which are configured to effectively position each of the two circulating sleeves simultaneously.

The present invention provides a linear slide rail comprising: a guide rail, a slider, a two-cycle module, two retainers, and two end cover modules. A rolling groove is formed on each of opposite sides of the guide rail. The sliding groove is concavely disposed with a matching groove, and the matching groove of the sliding sleeve is slidably sleeved on the guide rail, and the sliding member is formed with two through receiving passages on opposite sides of the engaging groove. The two-cycle module is respectively disposed on opposite sides of the slider, and each cycle module comprises: two circulating sleeves and two rolling units. The two circulating sleeves are disposed in the adjacent two receiving passages, and each of the circulating sleeves at least partially protrudes beyond the slider. The two rolling units are respectively installed in the two circulating sleeves, and the two rolling units are slidably sandwiched between the guide rail and the slider at a portion other than the two circulating sleeves. The two retainers are respectively disposed on opposite sides of the guide rail and disposed on the slider, and the two retainers respectively position and maintain the positions of the two circulating modules relative to the guide rails. Each retainer includes: a limiting member and a top abutting member. The limiting member has a base portion and two side wing portions extending integrally from the base portion, and the two side wings respectively form a limiting hole, the limiting member has a substantially V-shaped cross section, and the two ends of the V-shaped outer edge of the limiting member are Forming a dustproof strip respectively, and the two dustproof strips abut against the surface of the corresponding guide rail of the guide rail; wherein, in the circulation module in which the retainer is positioned, the two circulating sleeves are respectively positioned on the two of the limiting members The limiting hole of the side wing portion, and the two rolling units are respectively located at positions other than the two circulating sleeves, and are respectively threaded through the limiting holes of the two side wings. The opposite side portions of the abutting member are respectively fitted to the base portion of the limiting member and the slider. The two end cover modules are respectively mounted on the slider and slidably sleeved on the guide rails, and the two end cover modules cover the circulation sleeve portions of the two circulation modules protruding beyond the slider.

The embodiment of the present invention further provides a retainer for the linear slide rail, comprising: a limiting member and a top abutting member. The limiting member has a base portion and two side wing portions extending integrally from the base portion, the base portion is formed with a mounting groove, and the two side wing portions are respectively formed with a limiting hole, and one of the limiting holes of the two limiting holes is oriented toward the mounting groove The side offset is set, and the other of the limiting holes is offset from the opposite side of the mounting groove, the limiting member The cross section is substantially V-shaped, and a dustproof strip is respectively formed at both ends of the V-shaped outer edge of the limiting member. One side portion of the abutting member is fitted to the mounting groove of the base portion.

In summary, the linear slide rail and the retainer of the present invention have the advantages of simple production, convenient production and long service life.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are only for reference and explanation, and are not intended to limit the scope of the present invention. .

100‧‧‧Linear slides

1‧‧‧rail

11‧‧‧ rolling groove

111‧‧‧ bottom wall

112‧‧‧Load side wall

12‧‧‧Abutment

2‧‧‧ Slider

21‧‧‧With slot

211‧‧‧Positioning ditch

212‧‧‧ side positioning groove

213‧‧‧ Carrying wall

22‧‧‧ accommodating channel

23‧‧‧Installation end face

3‧‧‧Circuit module

31‧‧‧Circulating casing

311‧‧‧ Straight line

312‧‧‧ Turning section

32‧‧‧ spacer

33‧‧‧ rolling unit

4‧‧‧ Keeper

41‧‧‧Limited parts

411‧‧‧ base

4111‧‧‧Installation slot

4112‧‧‧Clamping clip

412‧‧‧Flanking

4121‧‧‧Limited holes

4122‧‧‧Arc wall

4123‧‧‧Long side wall

4124‧‧‧Limited column

4125‧‧‧Installation strip

4126‧‧‧Bound wall

41261‧‧‧Perforation

42‧‧‧Parts

421‧‧‧ fitting column

422‧‧‧ buckle column

43‧‧‧Dust strip

5‧‧‧End cap module

C‧‧‧ gap

S‧‧‧ sliding direction

Figure 1 is an exploded perspective view of the linear slide of the present invention.

Figures 2 and 3 are schematic views of the assembly of the linear slide of the present invention.

Figure 4 is a schematic cross-sectional view of Figure 3 taken along the line I-I.

Figure 5 is a schematic view of the slider of the linear slide of the present invention.

FIG. 6 is a schematic diagram of a set of loop modules and holders of the linear slide of the present invention.

Figure 7 is a schematic view of another perspective of Figure 6.

Figure 8 is a side elevational view of the retainer of the linear slide of the present invention.

Fig. 9 is a partially enlarged view of the stopper of the retainer of the linear slide of the present invention.

Fig. 10 is a partially enlarged view showing the combination of the stopper and the dustproof member of the holder of the linear slide of the present invention.

The following describes the implementation of the linear slide and its holder of the present invention by a specific specific example, and those skilled in the art can easily understand other advantages and effects of the present invention by the contents disclosed in the present specification. The present invention may also be implemented or applied by other specific examples. The details of the present specification may also be based on different viewpoints and applications, and various modifications and changes may be made without departing from the spirit of the present invention. The drawing of this creation is only a brief description, and is not depicted in actual size, that is, the actual size of the relevant composition is not reflected, which will be described first. The following embodiments are intended to further explain the scope of this creation, but do not limit the scope of the creation in any way.

As shown in FIG. 1 , the linear slide rail 100 includes a guide rail 1 and a slider 2 . The ring module 3, the two retainers 4 and the two end cover modules 5. The appearance of the guide rail 1 is substantially I-shaped, and the slider 2 has a matching groove 21 corresponding to the appearance of the guide rail 1. The two circulating modules 3 are combined with the two retainers 4, and are respectively disposed on the mating groove 21. Both sides; that is, each of the circulation modules 3 is coupled to one of the holders 4 and is disposed on the inner wall of one side of the fitting groove 21. As shown in FIG. 2 and FIG. 3 , when the loop modules 3 and the sliders 2 of the retainers 4 are disposed on the guide rail 1 , the loop modules 3 and the retainers 4 are correspondingly located on the guide rail 1 . Between the slider 2. The end cover modules 5 are respectively disposed on the two opposite mounting end faces 23 of the slider 2, and the circulating modules 3 and the retainers 4 disposed in the matching slots 21 are respectively disposed at two ends respectively. In the end cover module 5, in the practical application, each end cover module 5 can be used to provide the circulation modules 3 so that the slider 2 can slide smoothly on the guide rail 1.

In more detail, referring to FIG. 1, the guide rail 1 has an elongated shape, and the longitudinal direction of the guide rail 1 is defined as a sliding direction S. The opposite sides of the guide rail 1 are recessed to form an elongated rolling groove 11 parallel to the sliding direction S, and the surfaces connected to both sides of the rolling groove 11 are each defined as an abutting surface 12. Each of the rolling grooves 11 has a bottom wall 111 and two load side walls 112, and the two load side walls 112 are respectively connected to opposite side edges of the bottom wall 111.

The slider 2 is substantially elongated, and the length of the slider 2 is smaller than the length of the guide rail 1. The cross section of the slider 2 perpendicular to the longitudinal direction thereof is substantially inverted U-shaped, and the fitting groove 21 is formed. Since the slider 2 has a substantially symmetrical structure on the left and right, a part of the slider 2 will be described below. As shown in FIG. 4 and FIG. 5, the (inherent) inner edge of the engaging groove 21 is formed with a positioning groove 211, two side positioning grooves 212 and two bearing walls 213 along the longitudinal direction thereof. Two bearing walls 213 are respectively disposed between the positioning groove 211 and the two side positioning grooves 212. Preferably, the slider 2 is viewed from a cross section perpendicular to the sliding direction S (Fig. 1), and the center line of the two carrying walls 213 intersects substantially perpendicularly to the position where the positioning groove 211 is away from the guide rail 1. In addition, the slider 2 is formed with a through-receiving passage 22 along its length at a specific distance from each of the carrier walls 213. Preferably, in view of the cross section of the slider 2 in the vertical sliding direction S, the vertical line of each of the carrier walls 213 is substantially The center of the accommodating channel 22 corresponding thereto. As shown in FIG. 4, when the matching groove 21 of the slider 2 is correspondingly disposed on the guide rail 1, the positioning groove 211 of the slider 2 and the two bearing walls 213 substantially correspond to the rolling groove 11 of the guide rail 1, and the positioning groove of the slider 2 211 and the bottom wall 111 of the rolling groove 11 of the guide rail 1 face each other, and the two bearing walls 213 of the slider 2 respectively face the two load side walls 112 of the rolling groove 11.

As shown in FIGS. 6 and 7, each circulation module 3 has two circulation sleeves 31, two spacers 32, and two rolling units 33. Each of the circulating sleeves 31 is constructed by assembling a plurality of sheets in this embodiment, but for convenience of explanation, each of the circulating sleeves 31 will be described as a whole in the following; and each rolling unit 33 is In the embodiment, the chain roller is taken as an example, but the rolling unit 33 may also be in the form of a non-chain or a ball, which is not limited herein. In detail, each of the circulation sleeves 31 defines a straight section 311 and two substantially U-shaped turning sections 312 extending from opposite ends of the straight section 311. The length of the straight section 311 is slightly longer than the length of the accommodating passage 22 (shown in FIG. 5), and the ends of the two turning sections 312 face each other with the distance between the two being slightly smaller than the length of the accommodating passage 22. Wherein, the circulation sleeve 31 and its corresponding spacer 32 together form a rolling path (not shown), and the inner edge of the circulation sleeve 31 and its corresponding spacer 32 form a continuous track structure (Fig. Not shown, the scroll unit 33 can move along the rolling path corresponding to the track configuration. Referring to FIG. 4 to FIG. 6 , the relationship between the circulation module 3 and the slider 2 is that the two circulating sleeves 31 of the circulation module 3 are respectively disposed in the adjacent two accommodating passages 22 in the straight line segment 311 . The inside is smoothly and stably installed in the accommodating passage 22 through the stepped structure of the outer edge of the straight section 311.

Referring to FIG. 1 , the two retainers 4 are respectively disposed between the inner side edges of the engaging grooves 21 and opposite sides of the guide rail 1 , and the two retainers 4 are respectively used for positioning and maintaining the two circulating modules 3 relative to each other. At the position of the guide rail 1. Since the two retainers 4 are of the same configuration and the positions of the mounting are also symmetrical to the above-mentioned guide rail 1, only one retainer 4 and its corresponding other component configurations will be described below.

As shown in FIGS. 6-8, the retainer 4 is elongated and has a length substantially corresponding to the length of the circulation module 3. The retainer 4 has a limiting member 41, a top abutting member 42 and two defenses Dust strip 43. The limiting member 41 and the two dustproof strips 43 are integrally formed, and the limiting member 41 has a substantially V-shaped cross section perpendicular to the longitudinal direction thereof, and the V-shaped outer edge of the limiting member 41 is substantially planar. The two dustproof strips 43 are integrally formed with the limiting member 41 in a two-shot injection molding manner; specifically, the limiting member 41 may be a relatively hard plastic material, and the dustproof strip 43 may be relatively soft and elastic. Plastic material. In particular, the dust-proof strips 43 of the respective stoppers 41 are formed by means of two-shot injection molding, which can effectively reduce the manufacturing process of the holder 4, and can greatly improve the production efficiency thereof, and is relatively high in comparison with the conventional dust-proof strips 43. The snaps are disposed on the limiting member 41. The dustproof strips 43 of the retainer 4 of the embodiment have relatively good connectivity with the limiting members 41.

In more detail, the limiting member 41 includes a strip-shaped base portion 411 and two side wing portions 412 which are obliquely inclined away from each other from the opposite long side edges of the base portion 411 (as shown in FIG. 5). The base portion 411 is formed by extending from the upper left and the lower left of the base. The base portion 411 is formed with a strip-shaped mounting groove 4111 along a longitudinal direction thereof at a substantially central portion thereof, and the base portion 411 is formed with a plurality of fastening clips 4112 at both ends of the adjacent mounting groove 4111. The two side flanges 412 are formed with an elongated limiting hole 4121 along the length direction thereof, and one of the limiting holes 4121 of the two limiting holes 4121 is facing one side of the mounting groove 4111 (as shown in FIG. 5 above). The limiting hole 4121 is offset from the right side of the mounting slot 4111, and the other limiting hole 4121 is facing the opposite side of the mounting slot 4111 (as shown in the lower limiting hole 4121 in FIG. 5). The left side of the mounting slot 4111 is offset.

In other words, each of the limiting holes 4121 is surrounded by two long side walls 4123 and two arc-shaped walls 4122, and the two long side walls 4123 extend toward each other to form an elongated limiting post 4124. The distance between the end faces of the two limiting posts 4124 of each side wing portion 412 is smaller than the distance between the adjacent arcuate walls 4122. Furthermore, the side wings 412 are respectively provided with a mounting strip 4125 at a position away from the base 411, and the mounting strips 4125 are geometrically engageable with the side positioning grooves 212. The abutting member 42 includes a fitting post 421 and two fastening posts 422. The cross section perpendicular to the longitudinal direction thereof is substantially hexagonal, and opposite sides of the fitting post 421 (such as the front side and the rear side of the fitting post 421 in FIG. 5) are geometrically fitted to the positioning groove 211 and mounted respectively. The slot 4111 is formed in a cylindrical shape and is integrally formed from the opposite end faces of the fitting post 421 (the left end surface and the right end surface of the fitting post 421 in FIG. 5).

Furthermore, the abutting member 42 is fitted to the mounting groove 4111 of the limiting member 41 at one side of the fitting post 421, and the two fastening posts 422 are respectively clamped to the two sets of the fastening clips 4112, and the two lengths are respectively The dust-proof strip 43 of the type is formed at a position where the side wings 412 are away from the base 411, and is located substantially on the opposite side of the mounting strip 4125, that is, the two long-shaped dustproof strips 43 are formed at the V-shaped outer edge end of the limiting member 41. At the office.

In particular, it is particularly emphasized in the present embodiment that the limiting member 41 and the dust-proof strip 43 of the retainer 4 are integrally formed by means of two-material injection. In practical applications, the forming limiter may be first injected. 41, and then the two ends of the limiting member 41 are ejected to form two dust-proof strips 43; and in order to make the two of them more firmly coupled, in actual implementation, the limiting member 41 may be formed at the end thereof during the forming process. The structure combined with the dustproof strip 43 is reinforced.

Further, as shown in FIG. 9, in the process of the two-shot injection molding, the formed limiting member 41 is firstly ejected, and at the ends of the two side wings 412, a coupling wall 4126 may be respectively formed, and the coupling walls 4126 may be respectively formed. The plurality of perforations 41261 are included, and the longitudinal length of each of the bonding walls 4126 in the sliding direction S (shown in FIG. 1) may be smaller than the longitudinal length of the entire limiting member 41, and the two ends of the bonding walls 4126 may be correspondingly formed. Gap C. As shown in FIG. 10, after the injection molding stopper 41 is ejected, the dust-proof strip 43 may be formed on the coupling walls 4126 of the limiting member 41, and the part for forming the dust-proof strip 43 may be injected. Correspondingly, the corresponding holes 41261 and the notches C are filled, so that at least a part of the finally formed dust-proof strip 43 is embedded in the bonding wall 4126, and at least a part of the dust-proof strip 43 is covered by the bonding wall 4126. Thereby, the stability of the dustproof strip 43 and the joint wall 4126 can be effectively improved.

Referring to FIG. 4 and FIG. 8 and referring to FIG. 5 and FIG. 6 as appropriate, the relationship between the retainer 4 and each component is roughly described as follows. The engagement of the holder 4 with the slider 2 is such that the fitting post 421 of the abutting member 42 is fitted to the positioning groove 211 of the slider 2, and the mounting strips 4125 of the side wings 412 are respectively fitted to the side positioning grooves of the slider 2. 212. The combination of the retainer 4 and the circulation module 3: the two circulating sleeves 31 of the circulation module 3 are respectively limited to the two limiting holes 4121 of the limiting member 41, and further, the two turning segments of each circulating sleeve 31 The ends of the 312 are respectively fastened to the two arc-shaped walls 4122 of the corresponding limiting holes 4121 and the end faces of the limiting posts 4124 adjacent to the curved wall 4122, and the rolling units 33 on each of the carrying walls 213 are worn. The corresponding limit hole 4121 is passed. The mate 4 is matched with the guide rail 1 : a gap is left between the V-shaped outer edge of the limiting member 41 and the rolling groove 11 of the guide rail 1 , and the two dustproof strips 43 respectively abut against the two abutting faces 12 adjacent to the rolling groove 11 .

Therefore, the linear slide rail 100 of the present invention is designed with the position limiting member 4121 of the retainer 4 through the position limiting member 4121 and the top abutting member 42 can be engaged with the limiting member 41 and the slider 2 to make the cross misalignment. The two circulating sleeves 31 arranged are effectively positioned by the holder 4. Further, the retainer 4 passes through the dustproof strip 43 to prevent impurities or dust from entering the rolling groove 11 through the abutting surface 12.

The above is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the patents of the present invention. Any changes and modifications made to the scope of the patent application of the present invention should be covered by the present invention.

3‧‧‧Circuit module

31‧‧‧Circulating casing

311‧‧‧ Straight line

312‧‧‧ Turning section

32‧‧‧ spacer

33‧‧‧ rolling unit

4‧‧‧ Keeper

41‧‧‧Limited parts

411‧‧‧ base

4111‧‧‧Installation slot

4112‧‧‧Clamping clip

412‧‧‧Flanking

4121‧‧‧Limited holes

4122‧‧‧Arc wall

4123‧‧‧Long side wall

4124‧‧‧Limited column

4125‧‧‧Installation strip

42‧‧‧Parts

421‧‧‧ fitting column

422‧‧‧ buckle column

43‧‧‧Dust strip

Claims (10)

A linear slide rail includes: a guide rail having a rolling groove formed on opposite sides thereof; a sliding block recessed with a matching groove, and a matching groove of the sliding sleeve is slidably sleeved on the guide rail, The sliders are respectively formed with two through receiving passages on opposite sides of the matching groove; two circulating modules are respectively installed on opposite sides of the slider, and each circulating module comprises: two circulating sleeves a tube, which is disposed in the two adjacent accommodating passages, and each of the circulating sleeves at least partially protrudes beyond the slider; and two rolling units respectively installed in the two circulating sleeves, and The two rolling units are slidably sandwiched between the rail and the slider at a portion other than the two circulating sleeves; two retainers are respectively located on opposite sides of the rail and are disposed on the slider, and the two The holders respectively position and maintain the positions of the two circulation modules relative to the guide rails. Each of the holders includes: a limiting member having a base portion and two side wings extending integrally from the base portion, the two wing portions are respectively formed There is a limit hole, and the cross section of the limit member is substantially V Two dust-proof strips are formed at both ends of the V-shaped outer edge of the limiting member, and the two dust-proof strips abut against the surface of the corresponding guide rail of the guide rail, and the dust-proof strips are injected in two materials. An arrangement in which the limiting member is integrally formed; wherein, in the circulation module in which the retainer is positioned, the two circulating sleeves are respectively positioned on the limiting holes of the wing portions of the limiting member, and the The two rolling units are respectively disposed in a position other than the two circulating sleeves through the limiting holes of the two side wings; and an abutting member, the opposite side portions are respectively fitted to the base of the limiting member With the slider; The two end cover modules are respectively mounted on the slider and slidably sleeved on the guide rail, and the two end cover modules cover the circulation sleeve protruding from the two circulation modules outside the slider Part. The linear slide rail according to claim 1, wherein the opposite inner side edges of the matching groove are respectively formed with a positioning groove, and the base of each limiting member is formed with a mounting groove, and each of the top abutting members includes an inlay. The pillars are assembled, and each of the abutting members is fitted to the corresponding groove positioning groove and the limiting member mounting groove by the opposite side portions of the fitting column. The linear slide rail according to claim 2, wherein the two circulating sleeves of each circulation module are arranged in the wrong arrangement of the sliders, and in each of the limiting members, the two limiting positions One of the limiting holes of the hole is offset toward the one side of the mounting groove, and the other of the limiting holes is offset from the opposite side of the mounting groove so that each limit is set The two limiting holes of the position piece respectively locate the two cross-displacement circulating sleeves of the corresponding circulating module. The linear slide rail according to claim 3, wherein each rolling groove has two load side walls, and an inner edge of the matching groove is formed with two bearing walls facing the two load side walls corresponding to each rolling groove; a rolling unit is located at a portion other than the circulating sleeve that is accommodated therebetween, and is rollably sandwiched between the load side wall of the guide rail and the bearing wall of the slider; among the two bearing walls corresponding to each rolling groove The vertical lines intersect substantially vertically, and the mid-perpendicular line of each of the load-bearing walls passes substantially through the center of the corresponding receiving passage. The linear slide rail according to claim 2, wherein each of the limiting members is formed with a set of fastening clips at both ends of the base adjacent to the mounting groove, and each of the topping members further comprises two fastening posts. And the two fastening posts are respectively formed integrally extending from opposite end faces of the fitting column, and the two fastening posts of each abutting member are respectively clamped to the two sets of fastening clips of the corresponding limiting members thereof. . The linear slide rail of claim 5, wherein the opposite inner edges of the mating groove are formed with two side positioning grooves equidistant from the positioning groove, each A mounting strip is disposed on each of the two side wings of the limiting member at a position away from the base, and the mounting strips of the two limiting members are respectively fitted to the side positioning grooves of the slider. The linear slide rail according to any one of the preceding claims, wherein the end portions of the two side wings of the limiting member are respectively formed with a coupling wall, each of the coupling walls including a plurality of perforations, and each The longitudinal length of the binding wall is smaller than the overall longitudinal length of the limiting member, and a gap is formed at each end of each of the binding walls, and the limiting member and the dustproof strip form part of the dustproof strip when the two materials are injection molded. Filling the through holes and the notches, and the dust strips are wrapped around the two ends of the bonding wall. A retaining device for a linear slide rail includes: a limiting member having a base portion and two side wings extending integrally from the base portion, the base portion forming a mounting groove, wherein the two side wings are respectively formed with a limiting hole, the two One of the limiting holes of the limiting hole is offset from the mounting groove toward one side, and the other of the limiting holes is offset from the opposite side of the mounting groove, the limit is set. The cross-section of the member is substantially V-shaped; two dust-proof strips are formed at both ends of the V-shaped outer edge of the limiting member, and the dust-proof strips are integrally formed with the limiting member in a double-ejected manner; A top abutting member is fitted to the mounting groove of the base at one side. The holder of the linear slide rail according to claim 8, wherein the limiting member is formed with a set of fastening clips at both ends of the base adjacent to the mounting groove, and each of the topping members comprises a fitting column. And a plurality of fastening posts, wherein the two fastening posts are integrally extended from opposite end faces of the fitting post, and a fitting post side portion of the abutting member is fitted to the mounting groove of the base, the top The two fastening posts of the abutting member are respectively clamped to the two sets of fastening clips of the limiting member. The retainer of the linear slide rail according to the eighth or the ninth aspect of the invention, wherein the ends of the two side wings of the limiting member are respectively formed with a coupling wall, and each of the coupling walls includes a plurality of perforations, and The longitudinal length of each of the binding walls is smaller than the overall longitudinal length of the limiting member, and a gap is formed at each end of each of the bonding walls, and the limiting member and the dustproof strip form part of the dustproof strip during the injection molding of the dustproof strip. , Filling the through holes and the notches, and the dust strips are wrapped around the two ends of the bonding wall.