TWI843327B - Retractable device - Google Patents

Abstract

A telescopic device includes a shell assembly unit, a rotating unit, and a telescopic unit. A tooth set is formed on one side of the shell assembly unit. The rotating unit is arranged in the shell assembly unit and has a tooth set formed at one end thereof for engaging with the tooth set. The tooth set cooperates with the tooth set to allow the rotating unit to rotate relative to the shell assembly unit along a first direction, and can cooperate to prevent the rotating unit from rotating along a second direction opposite to the first direction. A part of the telescopic unit is assembled and wound on the rotating unit, and another part protrudes from the shell assembly unit and can be pulled, thereby extending the protruding length protruding from the shell assembly unit and driving the rotating unit to rotate along the first direction. The present invention can solve the problem of accidental rotation and retraction of the telescopic unit.

Description

Retractable device

The present invention relates to a red velvet column used to indicate that people are prohibited from passing through or to guide people to move, and in particular to a retractable device.

Referring to Figures 1 and 2, an existing red velvet column includes a base device 11 and a telescopic device 12 installed on the base device 11.

The telescopic device 12 includes a shell assembly unit 121 inserted at the top of the base device 11, a rotating unit 122 rotatably arranged in the shell assembly unit 121 relative to the shell assembly unit 121, a telescopic unit 123 wound around the rotating unit 122 and inserted in the shell assembly unit 121, and an elastic unit 124 assembled between the rotating unit 122 and the shell assembly unit 121.

When the telescopic unit 123 is pulled out by the user as shown in FIG1 , the rotating unit 122 is driven to rotate, and the elastic unit 124 is pulled to deform the elastic unit 124 and store elastic force. When the user releases the telescopic unit 123, the elastic unit 124 releases elastic force and drives the rotating unit 122 to rotate, thereby rolling the extension of the telescopic unit 123 protruding from the housing unit 121 back onto the rotating unit 122.

Although the telescopic unit 123 of the telescopic device 12 can be conveniently and automatically rotated and retracted, the telescopic unit 123 of the telescopic device 12 is not designed to maintain the protruding length of the telescopic unit 123 protruding from the housing unit 121. Therefore, the telescopic unit 123 of the telescopic device 12 will be rotated and retracted as soon as the user lets go. In this way, when the user accidentally lets go, he may be hit by the retracted telescopic unit 123 in an instant, so be careful.

The purpose of the present invention is to provide a telescopic device that can improve at least one disadvantage of the prior art.

The telescopic device includes a housing unit, a rotating unit, and a telescopic unit.

A tooth set is formed on one side of the housing unit. The rotating unit is rotatably arranged in the housing unit relative to the housing unit, and a tooth set is formed at one end thereof to engage with the tooth set. The tooth set cooperates with the tooth set to allow the rotating unit to rotate relative to the housing unit along a first rotation direction, and the tooth set cooperates with the tooth set to prevent the rotating unit from rotating along a second rotation direction opposite to the first rotation direction. A part of the telescopic unit is assembled and wound around the rotating unit, and the other part protrudes from the housing unit and can be pulled, thereby extending the protruding length protruding from the housing unit and driving the rotating unit to rotate along the first rotation direction.

The effect of the present invention is that the tooth set and the protruding tooth set can cooperate to limit the rotating unit to be pulled out only in one direction along the first rotation direction, so there will be no problem of the telescopic unit accidentally rotating and retracting to hit the user.

2: Red Velvet Column

21: Base device

3: Shell unit

31: Shell

32: Cover

33: Top shell

331: The first seam

332: Second seam

34: Bottom shell

35: Assembly Department

36: Tooth group

361: Tooth structure

362: Straight protruding tooth surface

363: Oblique protruding tooth surface

37: Cover the hole

4: Rotating unit

41: Rotating axis

42: Rings

43: Top shaft

44: Bottom shaft

45: Middle shaft

46: Gear set

461: Tooth structure

462: Straight tooth surface

463: Oblique tooth surface

47: Assembly seam

5: Elastic unit

6: Telescopic unit

61: Telescopic parts

62: Card Item

63: Operating parts

7: Switching unit

71: Elastic parts

72: Push piece

721: Column body

722: Head block

D1: Axial direction

D2: radial direction

T1: First turn

T2: Second turn

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is an incomplete three-dimensional diagram illustrating an existing red velvet column; FIG. 2 is an incomplete three-dimensional exploded diagram illustrating an existing telescopic device of the red velvet column; FIG. 3 is an incomplete three-dimensional diagram illustrating an embodiment of the telescopic device of the present invention used in conjunction with a base device of a red velvet column; FIG. 4 is An incomplete three-dimensional exploded view illustrates the embodiment; FIG. 5 is a combined cross-sectional view illustrating a rotating unit of the embodiment in a first state; FIG. 6 is an exploded cross-sectional view, the section position of which is offset from a cover hole of the cover body, illustrating the structure of a protruding tooth group of a cover body and a locking tooth group of the rotating unit of the embodiment; and FIG. 7 is a combined cross-sectional view illustrating the rotating unit of the embodiment in a second state.

In the following descriptions, similar or identical components will be indicated by the same numbers.

Referring to Figures 3, 4, and 5, an embodiment of the present invention is applicable to a base device 21 disposed on a red velvet column 2 as shown in Figure 3, and comprises a housing assembly unit 3 applicable to be disposed on the base device 21, a rotating unit 4 rotatably disposed in the housing assembly unit 3 along a first rotation direction T1, an elastic unit 5 assembled between the housing assembly unit 3 and the rotating unit 4, a telescopic unit 6 assembled on the rotating unit 4 and partially protruding from the housing assembly unit 3, and a switching unit 7 mounted on the housing assembly unit 3.

Referring to Figures 4, 5, and 6, the housing assembly unit 3 includes a housing 31 and a cover 32 locked at the top of the housing 31.

The housing 31 includes a top housing 33 which is cylindrical and accommodates the rotating unit 4, the elastic unit 5 and the telescopic unit 6, a bottom housing 34 which is also cylindrical and extends downward from the bottom of the top housing 33, and a plurality of assembly parts 35 which protrude outward from the outer peripheral surface diameter of the top housing 33.

The top shell 33 is cylindrical as described above, and defines an axial direction D1 and a radial direction D2. A first insertion slit 331 for inserting the telescopic unit 6 is formed on one side of the top shell 33, and a second insertion slit 332 for inserting the elastic unit 5 is formed on the other side. The radial width of the bottom shell 34 is smaller than that of the top shell 33. The assembly parts 35 are used for detachably assembling the telescopic unit 6 of other telescopic devices that are the same as the present embodiment.

The cover 32 has a ring-shaped protruding tooth set 36 and a cover hole 37 that passes through the upper and lower parts and is surrounded by the protruding tooth set 36 on the side facing the housing 31.

The tooth assembly 36 is located at the top side of the housing assembly unit 3 and includes a plurality of tooth structures 361 arranged in a matching ring shape.

Each tooth structure 361 includes a straight tooth surface 362 extending along the axial direction, and an oblique tooth surface 363 extending obliquely. Specifically, a second turning direction T2 opposite to the first turning direction T1 is defined, and each oblique tooth surface 363 extends obliquely from one end of each straight tooth surface 362 close to the rotating unit 4 along the second turning direction T2 toward a direction away from the rotating unit 4.

The rotating unit 4 is located in the housing 31 and includes a rotating shaft 41 whose top abuts against the protruding tooth set 36 of the cover 32 and whose bottom is inserted into the bottom shell 34 of the housing 31, and two rings 42 spaced up and down from each other and extending radially outward from the rotating shaft 41 to form a circular ring.

The rotating shaft 41 includes a top shaft portion 43 higher than the ring 42 located above, a bottom shaft portion 44 located below the top shaft portion 43 and inserted into the bottom shell portion 34, and a middle shaft portion 45 located between the top shaft portion 43 and the bottom shaft portion 44.

The top shaft portion 43 is formed with a tooth set 46 that abuts against the protruding tooth set 36 of the cover body 32, and an assembly seam 47 that extends through the cover body 32 in the radial direction.

The tooth assembly 46 includes a plurality of tooth structures 461. Each tooth structure 461 includes a straight tooth surface 462 extending along the axial direction, and an oblique tooth surface 463. Each oblique tooth surface 463 extends obliquely from an end of a respective straight tooth surface 462 opposite to the cover body 32 of the housing unit 3 along the second turning direction T2 toward the cover body 32.

The straight tooth surfaces 462 can respectively engage with the straight protruding tooth surfaces 362 of the protruding tooth set 36, thereby cooperating to prevent the rotating unit 4 from rotating relative to the housing unit 3 along the second rotation direction T2. The oblique tooth surfaces 463 can cooperate with the oblique protruding tooth surfaces 363 of the protruding tooth set 36 to allow the rotating unit 4 to rotate relative to the housing unit 3 along the first rotation direction T1 as described above.

The middle shaft 45 is located in the top shell 33 of the shell 31 and is used for the telescopic unit 6 to be assembled and wound. Since the structure of the middle shaft 45 for the telescopic unit 6 to be clamped is common knowledge, the description is omitted here.

The ring 42 located at the top is located between the top shaft 43 and the middle shaft 45, and is used to support the elastic unit 5 to prevent the elastic unit 5 from sagging and interfering with the extension and contraction of the telescopic unit 6. The ring 42 located at the bottom is located between the bottom shaft 44 and the middle shaft 45, and can cooperate with the ring 42 located at the top to limit the telescopic unit 6 to the middle shaft 45.

The elastic unit 5 is a snail spring arranged on the ring 42 and supported by the ring 42. The elastic unit 5 is located at one end on the inner side in the radial direction D2 and is assembled and inserted in the assembly seam 47 of the top shaft portion 43, and the other end on the outer side in the radial direction D2 is assembled and inserted in the second insertion seam 332 of the top shell portion 33 of the shell body 31.

The telescopic unit 6 includes a telescopic member 61, and a locking member 62 and an operating member 63 disposed at opposite ends of the telescopic member 61.

In this embodiment, the retractable member 61 is a strip of red velvet cloth, a portion of which is wound around the middle shaft portion 45 of the rotating shaft 41 and is located between the upper and lower rings 42, and the other portion is inserted into the first insertion seam 331 of the top shell portion 33 of the shell body 31 (see FIG. 3 for a schematic diagram).

The abutment member 62 is clamped on the middle shaft portion 45 of the rotating shaft 41 so that the telescopic member 61 is linked to the rotating shaft 41. The operating member 63 is located outside the top shell portion 33 of the shell 31 (see FIG. 3 for schematic diagram), and can be operated by a user to pull the telescopic member 61 out of the middle shaft portion 45 through the first insertion slit 331 of the shell 31, thereby extending the extension length of the telescopic member 61 protruding from the top shell portion 33.

The switching unit 7 includes an elastic member 71 disposed in the bottom shell 34 of the shell 31, and a push member 72 inserted in the cover hole 37 of the cover 32.

The elastic member 71 is supported between the bottom shell portion 34 and the bottom shaft portion 44 of the rotating shaft 41, and can provide elastic force to push the rotating shaft 41 toward the cover 32 along the axial direction D1, so that the tooth set 46 of the rotating shaft 41 is engaged with the protruding tooth set 36 of the cover 32.

The push member 72 includes a column body portion 721 inserted into the cover hole 37 and partially protruding upward from the cover body 32 (see FIG. 5 ), and a head block portion 722 of the tooth set 46 connected to the bottom end of the column body portion 721 and abutting against the rotating shaft 41.

Referring to Figures 5, 6, and 7, the column portion 721 of the push member 72 protrudes out of the cover 32 of the housing unit 3 and can be pressed by the user, thereby driving the rotating unit 4 to switch between a first state as shown in Figure 5 and a second state as shown in Figure 7.

In the first state, the tooth set 46 is engaged with the tooth set 36. When the user operates the operating member 63 to pull the telescopic member 61 out of the top shell 33 of the housing 31, the inclined tooth surfaces 363 and the inclined tooth surfaces 463 can cooperate to allow the telescopic member 61 to drive the shaft 41 to rotate along the first rotation direction T1 through the abutment member 62, so that the protruding extension length of the telescopic member 61 protruding from the top shell 33 is extended and increased, and the elastic unit 5 is pulled to deform, so that the elastic unit 5 stores the elastic force to drive the shaft 41 to rotate along the second rotation direction T2.

When the user stretches the telescopic member 61 to a required length and then lets go, the straight protruding tooth surfaces 362 and the straight clamping tooth surfaces 462 cooperate to limit the rotation axis 41 by the cover 32 and prevent it from rotating along the second rotation direction T2. Therefore, even if the elastic unit 5 stores elastic force that can drive the rotation axis 41 to rotate along the second rotation direction T2, the rotation axis 41 will not rotate. Similarly, even if the user accidentally lets go, the rotation axis 41 in the first state will not rotate. Therefore, this embodiment has the effect of maintaining the extension length of the telescopic member 61 after stretching, and has the effect of preventing the user from being injured by the telescopic unit 6 due to the instantaneous automatic rotation when accidentally letting go.

When the red velvet column 2 is used up and the retractable member 61 of the present embodiment needs to be retracted into the housing 31, the push member 72 of the switching unit 7 can be pressed. Pressing the column body 721 of the push member 72 can move the push member 72 downward and push the shaft 41 downward, while driving the shaft 41 downward to compress the elastic member 71 of the switching unit 7 and change the shaft 41 unit to the second state.

In the second state, the tooth set 46 and the protruding tooth set 36 are spaced apart and no longer engaged. At this time, since the elastic unit 5 is no longer restricted by the tooth set 46 and the protruding tooth set 36, the elastic unit 5 that stores the elastic force that can drive the shaft 41 to rotate along the second rotation direction T2 can release the elastic force to drive the shaft 41 to rotate along the second rotation direction T2, and the telescopic member 61 is retracted onto the shaft 41 again.

When the retractable member 61 has been completely retracted onto the shaft 41, the user only needs to release his hand, and the elastic member 71 of the switching unit 7 squeezed by the shaft 41 can release the elastic force to push the shaft 41 upward, so that the tooth set 46 of the shaft 41 is again engaged with the protruding tooth set 36 of the cover 32, and the rotating unit 4 is restored to the first state.

In summary, the function of the telescopic device of the present invention is that: in the first state, the protruding tooth set 36 and the locking tooth set 46 can cooperate with each other to allow the rotating unit 4 to rotate along the first rotation direction T1 when the telescopic unit 6 is pulled out from the housing unit 3, and in the second state, the elastic unit 5 can drive the rotating unit 4 to rotate along the second rotation direction T2. In this way, when the user pulls out the telescopic unit 6 to a sufficient length or accidentally lets go, the present invention has the effect of maintaining the extension length and preventing accidental rewinding. When the push member 72 of the switching unit 7 is pressed, it has the effect of allowing the telescopic member 61 to be automatically retracted onto the rotating shaft 41.

The above is only an embodiment of the present invention and cannot be used to limit the scope of the patent application of the present invention. In addition, simple equivalent changes and modifications according to the scope of the patent application of the present invention and the patent specification should also be covered by the scope of the patent application of the present invention.

3: Shell unit

31: Shell

32: Cover

33: Top shell

331: The first seam

332: Second seam

34: Bottom shell

35: Assembly Department

36: Tooth group

361: Tooth structure

362: Straight protruding tooth surface

363: Oblique protruding tooth surface

37: Cover the hole

4: Rotating unit

41: Rotating axis

42: Rings

43: Top shaft

44: Bottom shaft

45: Middle shaft

46: Gear set

461: Tooth structure

462: Straight tooth surface

463: Oblique tooth surface

47: Assembly seam

5: Elastic unit

6: Telescopic unit

61: Telescopic parts

62: Card Item

63: Operating parts

7: Switching unit

71: Elastic parts

72: Push piece

721: Column body

722: Head block

D1: Axial direction

D2: radial direction

T1: First turn

T2: Second turn

Claims (7)

A telescopic device comprises: a shell assembly unit, one side of which is formed with a tooth group; a rotating unit, which is rotatably arranged in the shell assembly unit relative to the shell assembly unit, and one end of which is formed with a tooth group that is engaged with the tooth group, the tooth group cooperates with the tooth group to allow the rotating unit to rotate relative to the shell assembly unit along a first rotation direction, and the tooth group cooperates with the tooth group to prevent the rotating unit from rotating along a second rotation direction opposite to the first rotation direction; and a telescopic unit, a part of which is assembled and wound on the rotating unit, and the other part protrudes from the shell assembly unit and can be pulled, thereby extending the protruding length of the protruding from the shell assembly unit, and driving the rotating unit to rotate along the first rotation direction. wherein the telescopic device further comprises an elastic unit assembled between the housing unit and the rotating unit, and a switching unit, the switching unit comprising an elastic member arranged between the other end of the rotating unit and the housing unit, and a push member inserted in the protruding tooth group and abutting against the tooth group, the push member protruding from the housing unit and being pressed to operate, and driving the rotating unit to switch between a first state and a second state, in the first state, the tooth group is engaged with the protruding tooth group, and the rotating unit can only rotate along the first rotation direction, in the second state, the tooth group is not engaged with the protruding tooth group, and the elastic unit is allowed to drive the rotating unit to rotate along the second rotation direction. The telescopic device as described in claim 1, wherein the housing assembly unit includes a housing and a cover disposed on the housing, the housing includes a top housing portion accommodating the rotating unit, the telescopic unit and the elastic unit, and a bottom housing portion extending downward from the top housing portion, the bottom housing portion is provided with the elastic member of the switching unit, and the cover is formed with the tooth set. The telescopic device as described in claim 2, wherein the rotating unit includes a rotating shaft abutting between the protruding tooth group of the cover and the elastic member of the switching unit, and the rotating shaft includes a top shaft portion formed with the tooth group, a bottom shaft portion inserted in the bottom shell portion of the housing and abutting the elastic member, and a middle shaft portion located in the top shell portion of the housing and for the telescopic unit assembly to be wound around. The telescopic device as described in claim 3, wherein the rotating unit further includes a ring extending outward from the rotating shaft in a ring shape, the ring being located between the top shaft and the middle shaft, and the elastic unit is a snail spring disposed on the ring, one end of which is connected to the top shaft and the other end of which is connected to the top shell of the shell. The telescopic device as described in claim 4, wherein the rotating unit further includes another ring extending outward from the rotating shaft in a ring shape and located at the bottom shaft and the middle shaft. The telescopic device as described in claim 3, wherein the telescopic unit includes a telescopic member, and a clamping member and an operating member arranged at two opposite ends of the telescopic member, the telescopic member is wound around the middle shaft of the rotating shaft, the clamping member is clamped on the middle shaft of the rotating shaft to make the telescopic member and the rotating shaft connected, and the operating member is located outside the housing and can be operated to pull the telescopic member out from the middle shaft through the top housing of the housing. A telescopic device as described in any one of claims 1 to 6, wherein the tooth group includes a plurality of tooth structures, each of the tooth structures includes a straight tooth surface extending along an axial direction, and an inclined tooth surface extending from an end of the straight tooth surface close to the rotating unit along the first rotation direction toward away from the rotating unit, and the tooth group includes a plurality of tooth structures, each of the tooth structures includes a straight tooth surface extending along the axial direction, and an inclined tooth surface extending from an end of the straight tooth surface opposite to the shell assembly unit along the first rotation direction toward the shell assembly unit.

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