CN220648714U

CN220648714U - Anti-pinch ice shaving machine

Info

Publication number: CN220648714U
Application number: CN202321783489.5U
Authority: CN
Inventors: 马瑞芬
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-07-08
Filing date: 2023-07-08
Publication date: 2024-03-22
Anticipated expiration: 2033-07-08

Abstract

The utility model discloses an anti-pinch ice shaving machine, which comprises an outer cup cover and an ice cube turntable, wherein the ice cube turntable is movably connected with the outer cup cover; still include the rocking handle, the rocking handle includes the handle body, and the one end of handle body is formed with power connection lid, and power connection lid and ice-cube carousel mutual location set up, and outer bowl cover includes the lid, and the upside of lid is formed with protruding cover portion, and power connection lid adaptation swing joint is equipped with the pressure ice spring in protruding cover portion on between lid and the ice-cube carousel, presses the ice spring and can promote power connection lid downwardly moving. The anti-pinch ice shaving machine can avoid the situation of pinching hands, is beneficial to optimizing the use experience of the ice shaving machine, and is convenient to use.

Description

Anti-pinch ice shaving machine

Technical Field

The utility model relates to the field of ice shaving appliances, in particular to an anti-pinch ice shaving machine.

Background

Currently, there is a manual ice shaving machine on the market, as shown in fig. 13, which is provided with a shaking handle, one end of the shaking handle is formed with a shaking handle cover 96, a turntable for driving ice cubes to rotate is connected with the shaking handle cover 96 through a transmission shaft, so that the shaking handle cover 96 and the turntable are relatively fixed, a cup cover is arranged at the upper part of the ice shaving machine, when the ice shaving machine is used, a user needs to press down the cup cover to avoid the movement of a shell of the ice shaving machine by fingers, so that a supporting sleeve 97 is formed on the cup cover, the supporting sleeve 97 is used for limiting the shaking handle cover 96, so that the user's hand can be scraped by the shaking handle by the cup cover, and also can be understood that the supporting sleeve 97 is arranged, so that a finger placing space is reserved between the cup cover and the shaking handle, the transmission shaft coaxially penetrates through the supporting sleeve 97 and is movably connected with the supporting sleeve, as shown in fig. 13, when the ice shaving machine is used, the user's finger (for example, a thumb 982 or an index finger 981) may be partially sunk between the upper end of the supporting sleeve 97 and the ice shaving handle cover 96, along with the rotation of the user, the shaking handle is formed, the cup cover 97, the user can shake the user's finger is required to be moved down by the spring to restore the elastic force of the shaking handle cover 96, and the user is not necessary, and the user has to feel to have to feel.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides an ice shaving machine, which can avoid the condition of clamping hands and is beneficial to optimizing the use experience of the ice shaving machine.

The aim of the utility model is achieved by the following technical scheme.

The utility model discloses an anti-pinch ice shaving machine, which comprises an outer cup cover and an ice rotating disc, wherein the ice rotating disc is movably connected with the outer cup cover; the novel ice pressing device comprises an ice rotating disc, and is characterized by further comprising a rocking handle, wherein the rocking handle comprises a handle body, one end of the handle body is provided with a power connection cover, the power connection cover and the ice rotating disc are mutually positioned, the outer cup cover comprises a cover body, an upper convex sleeve part is formed on the upper side of the cover body, the power connection cover is movably connected in the upper convex sleeve part in an adapting mode, an ice pressing spring is arranged between the cover body and the ice rotating disc, and the ice pressing spring can push the power connection cover to move downwards.

Preferably, the ice cube turntable comprises a tray body, a rotating shaft is formed on the upper side of the tray body, a rotating support sleeve is formed at the bottom of the outer cup cover, the rotating shaft is movably connected in the rotating support sleeve in a matching mode, the ice pressing spring is sleeved outside the rotating support sleeve, a spring positioning sleeve is formed at the bottom of the outer cup cover, the rotating support sleeve is arranged on the inner side of the spring positioning sleeve, the upper end of the ice pressing spring is arranged between the rotating support sleeve and the spring positioning sleeve, a spring positioning ring groove is formed in the tray body, the spring positioning ring groove is arranged on the outer side of the rotating shaft in a surrounding mode, and the lower end of the ice pressing spring is arranged in the spring positioning ring groove.

Preferably, the outer wall of the rotary supporting sleeve is provided with supporting ribs, the supporting ribs are distributed circumferentially, and the upper end part of the ice pressing spring is closely sleeved on the supporting ribs.

Preferably, the ice shaving machine further comprises a connecting piece, a lower hexagonal shaft part is formed at the lower end of the connecting piece, an upper hexagonal shaft part is formed at the upper end of the connecting piece, an inner hexagonal hole is formed at the upper end of the rotating shaft, the lower hexagonal shaft part is adaptively inserted into the inner hexagonal hole, an inner hexagonal sleeve is formed in the power connecting cover, and the upper hexagonal shaft part is detachably adaptively inserted into the inner hexagonal sleeve.

Preferably, a mandrel is formed in the inner hexagonal sleeve, a positioning center hole is formed at the upper end of the connecting piece, the mandrel is detachably inserted in the positioning center hole, extruded ribs are formed on the outer wall of the mandrel, the extruded ribs are uniformly distributed circumferentially and are attached to the inner wall of the positioning center hole.

Preferably, the ice shaving machine further comprises an outer cup and a material cup, wherein the material cup is arranged in the upper part of the outer cup, the tray body is arranged in the material cup, the cover body is buckled with the upper end of the material cup, the lower part of the outer cup is internally provided with a broken ice cup, the bottom of the material cup is provided with an ice discharging opening, one side of the ice discharging opening is provided with an ice shaving blade, the ice discharging opening is arranged above the broken ice cup correspondingly, the lower part of the outer cup is provided with cup taking openings, the positions of the cup taking openings correspond to the broken ice cup, the number of the cup taking openings is two, the two cup taking openings are respectively arranged on two sides of the broken ice cup, and the broken ice cup can leave the outer cup through the cup taking openings.

Preferably, a positioning concave table is formed at the bottom of the outer cup, the bottom of the crushed ice cup is arranged in the positioning concave table, and a guiding inclined step is formed at the edge part of the positioning concave table.

Preferably, the outer wall of the upper convex sleeve part is provided with anti-skid patterns.

Compared with the prior art, the utility model has the beneficial effects that: the power connection cover is formed at one end of the handle body of the rocking handle and is positioned with the ice cube turntable, the outer cup cover comprises the cover body, the upper side of the cover body is provided with the upper convex sleeve part, the power connection cover is movably connected in the upper convex sleeve part, the condition that the power connection cover clamps hands can be avoided, and the use experience sense of the ice shaver is optimized.

Drawings

Fig. 1 is a schematic perspective view of an ice shaving machine according to a first embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional structure of the ice shaving machine of the present utility model.

Fig. 3 is a schematic view showing a state of the ice shaver with ice cubes placed therein according to the present utility model.

Fig. 4 is a schematic view showing a state that a person holds the ice-shaving machine of the present utility model in which ice cubes are put.

Fig. 5 is a schematic perspective view of the outer cup of the present utility model.

Fig. 6 is a schematic perspective view of the outer cup cover of the present utility model.

Fig. 7 is a schematic top perspective view of the ice cube tray of the present utility model.

Fig. 8 is a schematic bottom perspective view of the ice cube tray of the present utility model.

Fig. 9 is a schematic bottom perspective view of the crank of the present utility model.

Fig. 10 is a schematic bottom perspective view of the coupling of the present utility model.

Fig. 11 is a schematic top perspective view of the coupling of the present utility model.

Fig. 12 is a schematic perspective view of an ice shaver according to a second embodiment of the utility model.

Fig. 13 is a schematic view showing a state in which a person holds an ice shaver in which ice cubes are put in the prior art.

Description of the reference numerals: an outer cup 1; taking a cup opening 101; a positioning concave table 11; a guide inclined step 111; an outer cup cover 2; a cover 21; an upper boss portion 22; anti-skid threads 2201; rotating the support sleeve 23; brace 2301; a spring positioning sleeve 24; a rocking handle 3; a handle body 31; rotating the handle 32; a power connection cover 33; an inner hexagonal sleeve 331; a mandrel 332; extrusion rib 3321; a crushed ice cup 4; an ice cube turntable 5; a tray body 51; anti-slip teeth 511; a rotating shaft 52; an inner hexagonal hole 521; a spring detent ring groove 53; a material cup 6; an ice discharge port 601; an ice-shaving blade 61; an ice pressing spring 7; a coupling member 8; a lower hexagonal shaft portion 81; an upper hexagonal shaft portion 82; positioning the central bore 821; ice cubes 99; index finger 981; thumb 982; a support sleeve 97; a crank cover 96; .

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The anti-pinch ice machine of the utility model, as shown in fig. 1 to 3, comprises an outer cup cover 2 and an ice cube turntable 5, wherein the ice cube turntable 5 is movably connected with the outer cup cover 2, the ice machine of the utility model also comprises a rocking handle 3, the rocking handle 3 comprises a handle body 31, one end of the handle body 31 is provided with a power connecting cover 33, the other end corresponding to the handle body 31 is provided with a rotary handle 32, the rotary handle 32 is rotatably connected with the handle body 31, the power connecting cover 33 and the ice cube turntable 5 are mutually positioned, in other words, the power connecting cover 33 can drive the ice cube turntable 5 to rotate, and the ice cube turntable 5 can drive the power connecting cover 33 to move up and down. As shown in fig. 6, the outer cup cover 2 includes a cover body 21, as shown in fig. 1 and fig. 6, an upper convex sleeve portion 22 is formed on the upper side of the cover body 21, and a power connection cover 33 is adapted to be movably connected in the upper convex sleeve portion 22, in other words, the power connection cover 33 can move up and down in the upper convex sleeve portion 22, the power connection cover 33 can also rotate in the upper convex sleeve portion 22, and the power connection cover 33 is in clearance fit with the upper convex sleeve portion 22. As shown in fig. 2 and 3, an ice pressing spring 7 is provided between the cover 21 and the ice rotary table 5, and the ice pressing spring 7 can push the power connection cover 33 to move downward.

As shown in fig. 3 and 4, in the process of using the ice shaver, the ice cubes 99 are positioned at the lower side of the ice cube tray 5, and relatively, the ice cubes 99 are pushed up against the ice cube tray 5, so that the ice cube tray 5 rotates the ice cubes 99, the ice shaving blades 61 of the ice shaver rotate relatively to the bottom of the ice cubes 99, and as the ice cubes 99 rotate, the ice cubes 99 gradually decrease, and the ice cube tray 5 is pressed against the ice cubes 99 due to the elastic restoring force of the ice compressing springs 7, as shown in fig. 4, the index finger 981 and thumb 982 of the left hand of the user can hold the upper boss 22, and the index finger 981 and thumb 982 can simultaneously press the outer cup cover 2, and then the right hand holds the rotating handle 32 and rotates the ice cubes 3, the ice cube tray 5 is pressed against the ice cubes 99 by the elastic restoring force of the ice compressing springs 7, the ice rotary table 5 is rotated while being lowered so that the power connection cover 33 is rotated while being lowered, and since the power connection cover 33 is adapted to be movably connected in the upper boss portion 22 as shown in fig. 4, a gap between the power connection cover 33 and the upper boss portion 22 in the up-down direction is eliminated even though the index finger 981 and the thumb 982 of the user contact the power connection cover 33, but as the power connection cover 33 is lowered, the index finger 981 and the thumb 982 can slide with respect to the power connection cover 33, thereby preventing the user's finger from being caught by the power connection cover 33, so that the user can operate the ice shaver of the present utility model in a relatively relaxed psychological state, and in addition, since the upper boss portion 22 is provided to limit the extent of the lowering of the handle body 31, the corresponding outer position of the upper boss portion 22 provides an operation space for the user's finger, that is to say, the ice shaving machine is convenient to use, so that the ice shaving machine can avoid the condition of clamping hands, and is beneficial to optimizing the experience of use.

Further, as shown in fig. 7 and 8, the ice cube turntable 5 includes a tray body 51, a rotating shaft 52 is formed on the upper side of the tray body 51, as shown in fig. 6, a rotating support sleeve 23 is formed on the bottom of the outer cup cover 2, as shown in fig. 2, the rotating shaft 52 is movably connected in the rotating support sleeve 23 in an adapting manner, that is, the rotating shaft 52 and the rotating support sleeve 23 are in clearance fit, as shown in fig. 2, the ice pressing spring 7 is sleeved outside the rotating support sleeve 23, as shown in fig. 6, a spring positioning sleeve 24 is formed on the bottom of the outer cup cover 2, the rotating support sleeve 23 is arranged inside the spring positioning sleeve 24, as shown in fig. 2, the upper end of the ice pressing spring 7 is arranged between the rotating support sleeve 23 and the spring positioning sleeve 24, as shown in fig. 7, a spring positioning ring groove 53 is formed on the tray body 51, and the spring positioning ring groove 53 is arranged on the outer side of the rotating shaft 52 in an enclosing manner, as shown in fig. 2, so that the lower end of the ice pressing spring 7 is arranged in the spring positioning ring groove 53, and the ice pressing spring 7 is well positioned radially, so that the ice pressing spring 7 is prevented from shifting in the elastic expansion process, and contraction process, and stable work of the ice pressing spring 7 is facilitated.

Further, as shown in fig. 6, a rib 2301 is formed on the outer wall of the rotation support sleeve 23, the ribs 2301 are circumferentially distributed, and the upper end portion of the ice pressing spring 7 is closely fitted on the rib 2301, in other words, the rib 2301 is closely fitted on the inner side of the spring wire of the ice pressing spring 7, thereby further avoiding radial displacement of the ice pressing spring 7.

Further, as shown in fig. 2, the ice shaver of the utility model further comprises a coupling member 8, as shown in fig. 10 and 11, a lower hexagonal shaft 81 is formed at the lower end of the coupling member 8, an upper hexagonal shaft 82 is formed at the upper end of the coupling member 8, as shown in fig. 7, an inner hexagonal hole 521 is formed at the upper end of the rotating shaft 52, as shown in fig. 2, the lower hexagonal shaft 81 is adapted to be inserted into the inner hexagonal hole 521, as shown in fig. 6, an inner hexagonal sleeve 331 is formed in the power connection cover 33, as shown in fig. 2, the upper hexagonal shaft 82 is detachably inserted into the inner hexagonal sleeve 331, in other words, the coupling member 8 plays a role of a coupling, so that the power connection cover 33 can drive the rotating shaft 52 to rotate synchronously, the rotating shaft 52 can drive the power connection cover 33 to move synchronously axially, wherein the coupling member 8 can be fixed at the upper end of the rotating shaft 52 through screws (note that the screws are not shown in the respective figures), the outer threads of the screws coaxially penetrate the coupling member 8 and are screwed with the upper hexagonal shaft 82, as shown in fig. 6, and the upper hexagonal sleeve 331 is in interference fit with the power connection cover 33, which is easy to be connected with the power connection cover 33; when the ice cube turntable 5 needs to be disassembled for cleaning, the power connection cover 33 is pulled out of the upper hexagonal shaft part 82, then the disc body 51 is pulled downwards, the rotating shaft 52 is pulled out of the rotating support sleeve 23, the ice cube turntable 5, the rocking handle 3 and the outer cup cover 2 can be cleaned independently, after cleaning, the lower end of the ice pressing spring 7 is inserted into the spring positioning ring groove 53, then the rotating shaft 52 penetrates into the rotating support sleeve 23, the inner hexagonal sleeve 331 is aligned with the upper hexagonal shaft part 82, and then the upper hexagonal shaft part 82 is inserted into the inner hexagonal sleeve 331 relatively.

Further, as shown in fig. 9, a mandrel 332 is formed in the inner hexagonal sleeve 331, as shown in fig. 11, a positioning central hole 821 is formed at the upper end of the coupling member 8, as shown in fig. 2, the mandrel 332 is detachably inserted into the positioning central hole 821, as shown in fig. 9, extrusion ribs 3321 are formed on the outer wall of the mandrel 332, the extrusion ribs 3321 are uniformly distributed circumferentially, as shown in fig. 2, the extrusion ribs 3321 are abutted against the inner wall of the connecting positioning central hole 821, so that the mandrel 332 and the positioning central hole 821 are in interference fit in practice, which is beneficial to improving the connection reliability of the power connection cover 33 and the coupling member 8, and preventing the power connection cover 33 and the coupling member 8 from easily generating axial slipping phenomenon.

Further, as shown in fig. 1 and 2, the ice crushing device further comprises an outer cup 1 and a material cup 6, the material cup 6 is arranged in the upper portion of the outer cup 1, for example, the upper portion of the material cup 6 is fastened with the outer cup 1, the tray body 51 is arranged in the material cup 6, the cover body 21 is fastened with the upper end of the material cup 6 through a rotary fastening structure, the crushed ice cup 4 is arranged in the lower portion of the outer cup 1, an ice discharging opening 601 is formed in the bottom of the material cup 6, an ice planing blade 61 is arranged on one side of the ice discharging opening 601, the ice discharging opening 601 is arranged above the crushed ice cup 4, as shown in fig. 5, a cup taking opening 101 is formed in the lower portion of the outer cup 1, as shown in fig. 1, the positions of the cup taking openings 101 correspond to the crushed ice cup 4, as shown in fig. 5, the number of the cup taking openings 101 is two, the two cup taking openings 101 are respectively arranged on two sides of the crushed ice cup 4, and can be understood that the cup taking openings 101 penetrate through the outer cup 1 along the diameter direction of the outer cup 1, and the crushed ice cup 4 can leave the outer cup 1 through the cup 1. The use flow of the ice shaving machine is as follows: the outer cup 1 is held by the left hand, the outer cup cover 2 is rotated anticlockwise by the right hand by a certain amplitude, the cover body 21 and the upper end of the material cup 6 are tripped, the outer cup cover 2, the rocking handle 3 and the ice rotary table 5 can be taken away from the outer cup 1, ice blocks 99 are placed into the material cup 6, the ice rotary table 5 is placed on the ice blocks 99, the outer cup cover 2 is pressed down by the hand, the ice pressing spring 7 is elastically compressed and deformed, the ice rotary table 5 moves upwards relative to the outer cup cover 2, the upper end of the material cup 6 can be sealed by the outer cup cover 2, the outer cup cover 2 is rotated clockwise, the cover body 21 and the material cup 6 are enabled to be restored to be buckled, the outer cup 1 and the outer cup cover 2 can be stabilized on a table top in a mode shown in fig. 4, then the rocking handle 3 is rotated, the rocking handle 3 drives the ice rotary table 5 to rotate, anti-slip teeth 511 are formed at the bottom of the ice rotary table 51 and are restored to be pressed on the ice blocks 99 through the elasticity of the ice pressing spring 7, the ice blocks 5 can be driven 99 to rotate, the ice shaving blades 61 can be filled up with the ice blades 101, the ice blades 101 can be taken out by the user or the user can take out from the ice cup 101 through the cup 101 when the cup 101, the ice cup is taken out by the user 4, and the user can take the ice cup from the cup 101 is taken out from the cup 101, and the cup is convenient to be taken down by the user.

Further, as shown in fig. 5, a positioning concave table 11 is formed at the bottom of the outer cup 1, as shown in fig. 2, the bottom of the crushed ice cup 4 is arranged in the positioning concave table 11, so that the crushed ice cup 4 can be prevented from easily sliding off the outer cup 1 when the ice shaver is inclined to a small extent, a guiding inclined step 111 is formed at the edge part of the positioning concave table 11, so that when the crushed ice cup 4 is pulled out of the outer cup 1 by a user, the bottom angle position of the crushed ice cup 4 can climb along the guiding inclined step 111 and leave the positioning concave table 11, thereby facilitating the user to pull the crushed ice cup 4 off the outer cup 1.

Further, as shown in fig. 1 and 6, the anti-slip pattern 2201 is formed on the outer wall of the upper boss portion 22, and the anti-slip pattern 2201 may be parallel to the axis of the ice cube turntable 5, so that, as shown in fig. 4, the user may pinch the upper boss portion 22 with the left hand and then rotate the rocking handle 3 with the right hand, and when rotating the rocking handle 3, the anti-slip pattern 2201 plays a role in anti-slip, so that the phenomenon that the upper boss portion 22 slips relatively with the fingers is avoided.

In some embodiments, as shown in FIG. 1, the outer surface of the rotary knob 32 is formed with anti-slip ribs, and the diameter of the rotary knob 32 is greater than the axial height of the rotary knob 32.

In some embodiments, as shown in fig. 12, the diameter of the rotary knob 32 is smaller than the axial height of the rotary knob 32, and the rotary knob 32 has a tapered shape with a smaller upper part and a larger lower part.

Claims

1. The utility model provides a prevent tong ice shaver, includes outer bowl cover (2) and ice-cube carousel (5), ice-cube carousel (5) with outer bowl cover (2) swing joint, its characterized in that: still include rocking handle (3), rocking handle (3) include handle body (31), the one end of handle body (31) is formed with power connection lid (33), power connection lid (33) with ice-cube carousel (5) mutual location sets up, outer bowl cover (2) include lid (21), the upside of lid (21) is formed with protruding cover portion (22), power connection lid (33) adaptation swing joint in go up protruding cover portion (22), lid (21) with be equipped with between ice-cube carousel (5) and press ice spring (7), it can promote to press ice spring (7) power connection lid (33) downstream.

2. The anti-pinch ice shaver as set forth in claim 1, wherein: the ice cake carousel (5) includes disk body (51), the upside of disk body (51) is formed with pivot (52), the bottom of outer bowl cover (2) is formed with and rotates support cover (23), pivot (52) adaptation swing joint in rotate in support cover (23), it locates to press ice spring (7) cover rotate outside support cover (23), the bottom of outer bowl cover (2) is formed with spring positioning sleeve (24), it locates to rotate support cover (23) the inboard of spring positioning sleeve (24), the upper end of pressing ice spring (7) is located rotate support cover (23) with between spring positioning sleeve (24), be formed with spring positioning annular (53) on disk body (51), spring positioning annular (53) are located the outside of pivot (52), the lower extreme of pressing ice spring (7) is located in spring positioning annular (53).

3. The anti-pinch ice shaver as set forth in claim 2, wherein: the outer wall of the rotary supporting sleeve (23) is provided with supporting ribs (2301), the supporting ribs (2301) are circumferentially distributed, and the upper end part of the ice pressing spring (7) is closely sleeved on the supporting ribs (2301).

4. The anti-pinch ice shaver as set forth in claim 2, wherein: the power connection device is characterized by further comprising a connecting piece (8), wherein a lower hexagonal shaft part (81) is formed at the lower end of the connecting piece (8), an upper hexagonal shaft part (82) is formed at the upper end of the connecting piece (8), an inner hexagonal hole (521) is formed at the upper end of the rotating shaft (52), the lower hexagonal shaft part (81) is adaptively inserted into the inner hexagonal hole (521), an inner hexagonal sleeve (331) is formed in the power connection cover (33), and the upper hexagonal shaft part (82) is detachably adaptively inserted into the inner hexagonal sleeve (331).

5. The anti-pinch ice shaver as set forth in claim 4, wherein: the inner hexagon sleeve (331) is internally provided with a mandrel (332), the upper end of the connecting piece (8) is provided with a positioning center hole (821), the mandrel (332) is detachably inserted into the positioning center hole (821), the outer wall of the mandrel (332) is provided with extrusion ribs (3321), the extrusion ribs (3321) are uniformly distributed circumferentially, and the extrusion ribs (3321) are attached to the inner wall of the positioning center hole (821).

6. The anti-pinch ice shaver as set forth in claim 2, wherein: still include outer cup (1) and material cup (6), material cup (6) are located in the upper portion of outer cup (1), disk body (51) are located in material cup (6), lid (21) with the upper end lock joint of material cup (6), broken ice cup (4) have been placed in the lower part of outer cup (1), the bottom of material cup (6) is formed with row's ice mouth (601), one side of row's ice mouth (601) is equipped with plane ice blade (61), row's ice mouth (601) are located the top that corresponds of broken ice cup (4), the lower part of outer cup (1) is formed with gets rim of a cup (101), get rim of a cup (101) position corresponds broken ice cup (4), get the quantity of rim of a cup (101) and set up to two, two get rim of a cup (101) and locate respectively broken ice cup (4) can get rim of a cup (101) and leave outside cup (1).

7. The anti-pinch ice shaver as set forth in claim 6, wherein: the bottom of outer cup (1) is formed with location concave station (11), the bottom of broken ice cup (4) is located in location concave station (11), the edge of location concave station (11) is formed with direction inclined step (111).

8. The anti-pinch ice shaver as set forth in claim 6, wherein: an anti-skid pattern (2201) is formed on the outer wall of the upper convex sleeve part (22).