Dustproof structure and caster

Abstract

The utility model provides a dustproof structure and trundle, including casing and dust cover, the casing includes annular side wall, the support part of extending to the inside along the one end surface of annular side wall and the blocking part of extending to the inside along the other end surface of annular side wall, and dust cover is a ring piece and is provided with the embedded part at the outer edge, and the placing space between embedded part and adjacent blocking part is matched, the casing and dust cover are placed in the center alignment, and embedded part is located between blocking part and support part. The utility model discloses a new dustproof structure to isolate the dust of outside and fly into the trundle inside.

Description

Technical Field

[0001] This utility model relates to the field of mobile caster technology, and in particular to a dustproof structure and caster. Background Technology

[0002] In the caster structure, the outer side of the spindle is used to connect with external devices such as the bed frame of the hospital bed or the cart body, while the inner side of the spindle cooperates with the internal devices of the caster. Therefore, a dust cover needs to be installed on the spindle to prevent external dust from flying into the interior of the caster.

[0003] In existing conventional caster structures, dust covers can be directly installed on the inner side of the spindle. However, in some casters, additional functional components need to be added to the inner side of the spindle, which affects the installation space of the dust cover. Therefore, a new dustproof structure needs to be designed to prevent external dust from entering the caster. Utility Model Content

[0004] In order to solve the above-mentioned problems of the prior art, the present invention provides a dustproof structure and caster that can prevent external dust from flying into the interior of the caster.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] In a first aspect, the present invention provides a dustproof structure, including a housing and a dustproof cover. The housing includes an annular sidewall, a support portion extending inward along one end of the annular sidewall, and a blocking portion extending inward at intervals along the other end of the annular sidewall. The dustproof cover is an annular piece with an embedded portion protruding from its outer edge, and the placement space between the embedded portion and the adjacent blocking portion is adapted to each other.

[0007] The housing and the dust cover are centered and aligned, and the embedded part is located between the blocking part and the supporting part.

[0008] The beneficial effect of this utility model is that: the embedded part on the dust cover is aligned with the placement space between the adjacent blocking parts and rotated, so that the embedded part is located between the blocking part and the support part, thereby achieving the effect of fixing the dust cover between the blocking part and the support part of the housing, thus preventing external dust from flying into the caster through the dust cover.

[0009] Optionally, the housing and the dust cover are fixedly connected in a horizontal rotational manner.

[0010] As described above, the dustproof function is prevented from failing due to the snap-fit ​​between the housing and the dust cover during horizontal rotation, thus avoiding the problem of the embedded part on the dust cover rotating into the housing's placement space during use.

[0011] Optionally, the annular sidewall is provided with at least two grooves in the placement space, and the embedded part is provided with a suspended part along the outer edge that corresponds to each of the grooves;

[0012] In both the clockwise and counterclockwise directions of horizontal rotation, at least one of the suspended portions engages with the sidewall of the groove.

[0013] Optionally, the side of the groove that engages with the suspended portion is an outwardly inclined surface.

[0014] As can be seen from the above description, the inclined surface facilitates the insertion of the suspended part to achieve a snap-fit ​​connection.

[0015] Optionally, there are multiple blocking portions and multiple embedding portions corresponding to each other.

[0016] Secondly, this utility model provides a caster, including a main shaft and a dustproof structure as described in the first aspect, wherein the main shaft passes through the central through hole of the dustproof cover and is fixedly connected to the dustproof cover.

[0017] Optionally, the spindle is provided with an annular groove, and the dust cover is composed of two half-designed dustproof parts, with the inner edges of the two dustproof parts clamped in the annular groove.

[0018] Optionally, the inner edge of the dust cover has a protruding annular step portion, which fits against the mounting surface on the main shaft.

[0019] The technical effect of the caster provided in the second aspect refers to the relevant description of the dustproof structure provided in the first aspect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a dustproof structure and its cooperation with the main shaft according to an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the shell structure involved in an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the dust cover according to an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the main shaft involved in an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the structure of a caster according to an embodiment of the present utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Shell; 11. Annular sidewall; 12. Support; 13. Blocking part; 14. Placement space; 15. Groove; 151. Inclined surface;

[0027] 2. Dust cover; 21. Embedded part; 22. Suspended part; 23. Central through hole; 24. Annular stepped part; 25. Dustproof component;

[0028] 3. Spindle; 31. Annular groove; 32. Assembly parts;

[0029] 100. Casters. Detailed Implementation

[0030] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0031] Example 1

[0032] Please refer to Figures 1 to 3 This utility model provides a dustproof structure, including a shell 1 and a dustproof cover 2.

[0033] like Figure 2 As shown, the housing 1 includes an annular sidewall 11, a support portion 12 extending inward along one end of the annular sidewall 11, and blocking portions 13 extending inward at intervals along the other end of the annular sidewall 11. That is, the support portion 12 and the blocking portions 13 are respectively disposed on the upper and lower end faces of the annular sidewall 11. The placement space 14 between adjacent blocking portions 13 does not extend inward, thus providing space for the dust cover 2 to be inserted. It should be noted that the support portion 12 is annular, and the blocking portion 13 has an arc-shaped edge, to adapt to the overall shape of the main shaft 3's mounting hardware 32 and the caster 100.

[0034] like Figure 3 As shown, the dust cover 2 is an annular piece with an embedded portion 21 protruding from its outer edge. The embedded portion 21 is adapted to the placement space 14 between adjacent blocking portions 13. In this embodiment, there are four corresponding blocking portions 13 and embedded portions 21, such that each embedded portion 21 is embedded below the corresponding blocking portion 13. In other embodiments, there are two, three, five, or more corresponding blocking portions 13 and embedded portions 21.

[0035] like Figure 1As shown, the housing 1 and the dust cover 2 are placed in the center and aligned. The insert 21 is located between the blocking part 13 and the supporting part 12, that is, the dust cover 2 is limited in the housing 1 by the insert 21.

[0036] In summary, when assembling the housing 1 and the dust cover 2, the embedded part 21 on the dust cover 2 is aligned with the placement space 14 between the adjacent blocking parts 13 and rotated. When the embedded part 21 on the dust cover 2 rotates to the bottom of the blocking part 13, the dust cover 2 is limited between the blocking part 13 and the support part 12 of the housing 1, thereby preventing external dust from flying into the caster 100 through the dust cover 2.

[0037] Example 2

[0038] Please refer to Figures 1 to 3 This utility model provides a dustproof structure. Based on the above embodiment one, in this embodiment, the shell 1 and the dust cover 2 are fixedly connected in a horizontal rotational manner. That is, the shell 1 will not rotate horizontally on the dust cover 2.

[0039] In this embodiment, the annular sidewall 11 has four grooves 15 in the placement space 14, and the insert 21 has a suspended part 22 corresponding to each groove 15 along its outer edge. Therefore, there are also four suspended parts 22. At this time, in both the clockwise and counterclockwise directions of horizontal rotation, there are two suspended parts 22 that engage with the sidewall of the corresponding groove 15, thereby horizontally limiting the dust cover 2. This prevents the insert 21 on the dust cover 2 from rotating into the placement space 14 of the housing 1 during use, which would cause the dustproof function to fail and improve the stability of the caster 100.

[0040] In this embodiment, the dust cover 2 is made of metal. Therefore, when assembling the housing 1 and the dust cover 2, when the insert portion 21 on the dust cover 2 rotates to below the blocking portion 13 and the suspended portion 22 is outside the groove 15, a jig is used to pry the suspended portion 22 into the groove 15, thereby achieving a snap-fit ​​between the suspended portion 22 and the groove 15. Therefore, in this embodiment, the side of the groove 15 that snaps into the suspended portion 22 is an outwardly inclined slope 151, the purpose of which is to facilitate the snap-fit ​​of the suspended portion 22.

[0041] like Figure 2 As shown, in this embodiment, two grooves 15 are set in one placement space 14, and the other two grooves 15 are set in another placement space 14 directly opposite each other, so as to facilitate the insertion of the suspended part 22.

[0042] In other equivalent embodiments, there can be two, three, or even five or more grooves 15. In this case, at least one suspended part 22 can be engaged with the side wall of the groove 15 in both the clockwise and counterclockwise directions of horizontal rotation.

[0043] The methods by which the housing 1 and the dust cover 2 are fixedly connected in horizontal rotation include, but are not limited to: corresponding holes on the housing 1 and the dust cover 2 for locking in place, and matching protrusions and recesses on the housing 1 and the dust cover 2 for locking in place, etc.

[0044] Example 3

[0045] Please refer to Figures 1 to 5 This utility model provides a caster 100, including a main shaft 3 and a dustproof structure according to any one of embodiments one or two. The main shaft 3 passes through the central through hole 23 of the dustproof cover 2 and is fixedly connected to the dustproof cover 2. At the same time, an annular step portion 24 protrudes from the inner edge of the dustproof cover 2, and the annular step portion 24 fits against the mounting part 32 on the main shaft 3. This not only improves space utilization, but also further prevents dust from entering the interior of the caster 100.

[0046] like Figure 4 As shown, the spindle 3 has an annular groove 31, and the dust cover 2 consists of two half-designed dustproof parts 25, with the inner edges of the two dustproof parts 25 clamped within the annular groove 31. (Refer to...) Figure 5 As can be seen, the dust cover 2 is located on the outside. When assembling with external components, the dust cover 2 needs to contact the external components, so it needs to play a role in partially supporting the external components. Therefore, the groove 15 is designed to increase the contact area between the dust cover 2 and the spindle 3, thereby increasing the bearing strength of the dust cover 2.

[0047] At this time, when assembling the dust cover 2, after aligning and clamping the inner edges of the two dustproof parts 25 in the annular groove 31, the housing 1 is inserted from the outer side of the main shaft 3, and the assembly of the housing 1 and the dust cover 2 is realized according to the description in Embodiment 1 or 2.

[0048] In summary, the dustproof structure of this embodiment not only achieves the effect of preventing dust from entering the caster 100, but also has the advantages of high space utilization and strong operational stability.

[0049] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0051] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] 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. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dustproof structure, characterized in that, The device includes a housing and a dust cover. The housing includes an annular sidewall, a support portion extending inward along one end of the annular sidewall, and a blocking portion extending inward at intervals along the other end of the annular sidewall. The dust cover is an annular piece with an embedded portion protruding from its outer edge. The embedded portion is adapted to the placement space between adjacent blocking portions. The housing and the dust cover are centered and aligned, and the embedded part is located between the blocking part and the supporting part.

2. The dustproof structure according to claim 1, characterized in that, The housing and the dust cover are fixedly connected in a horizontal rotation.

3. The dustproof structure according to claim 2, characterized in that, The annular sidewall is provided with at least two grooves in the placement space, and the embedded part is provided with a suspended part along the outer edge that corresponds to each of the grooves; In both the clockwise and counterclockwise directions of horizontal rotation, at least one of the suspended portions engages with the sidewall of the groove.

4. A dustproof structure according to claim 3, characterized in that, The side of the groove that engages with the suspended part is an outwardly inclined surface.

5. A dustproof structure according to any one of claims 1 to 4, characterized in that, There are multiple blocking portions and embedding portions in a one-to-one correspondence.

6. A caster, characterized in that, The device includes a spindle and a dustproof structure as described in any one of claims 1 to 5, wherein the spindle passes through the central through hole of the dustproof cover and is fixedly connected to the dustproof cover.

7. A caster according to claim 6, characterized in that, The main shaft is provided with an annular groove, and the dust cover is composed of two half-designed dustproof parts, with the inner edges of the two dustproof parts clamped in the annular groove.

8. A caster according to claim 6, characterized in that, The inner edge of the dust cover has a protruding annular step portion, which fits against the mounting surface on the main shaft.

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