Positioning type hand strap support and convex rail type hand strap support

Abstract

The utility model relates to the technical field of wristband supports, and discloses a positioning type wristband support and a protruding rail type wristband support, the positioning type wristband support comprises a sliding rail piece, a wristband piece, a sliding piece and a band fixing piece, the wristband piece is in butt joint with the sliding piece, the sliding rail piece is provided with a sliding rail groove, the sliding piece is movably embedded in the sliding rail groove, the sliding rail groove is provided with a side groove face, and the band fixing piece comprises a fixing block ball and a spring piece. The spring piece is used for enabling the fixed block bead to be in a pop-up state; the belt fixing piece is arranged on the sliding piece, a fixing block hole is formed in the side groove face, and the fixing block bead and the fixing block hole are arranged in an embedded or separated mode; or the belt fixing piece is installed on the side groove face, the sliding piece is provided with a fixing block hole, and the fixing block bead and the fixing block hole are arranged in an embedded mode or a separated mode. Thus, through displacement of the fixed block beads, friction between the fixed block beads and the sliding rail piece is reduced, the abrasion risk of the fixed block beads and the sliding rail piece is reduced, the service life of the fixed block beads and the service life of the sliding rail piece are prolonged, meanwhile, when the state is switched, the fixed block beads generate displacement, jamming is effectively avoided, labor is saved, and the use experience feeling of the wristband support is improved.

Description

TECHNICAL FIELD

[0001] The utility model discloses a technical field of hand belt support, specifically positioning formula hand belt support and convex rail formula hand belt support. BACKGROUND

[0002] People in the process of using electronic equipment in daily life, in order to better protect electronic equipment, generally will assemble protective shell on electronic equipment, realize the protection of electronic equipment through protective shell, and the electronic equipment can be a mobile phone, a tablet computer.

[0003] At present, in order to facilitate user handheld and realize the placement support of electronic equipment, a hand belt support is equipped on the protective shell. For example, the prior art with the authorization announcement number CN117440077B discloses a handheld device shell with adjustable hand belt, which comprises a shell, a hand belt, a sliding rail, a magnetic attraction assembly and a charging unit. At least one group of sliding gear protrusions is arranged in the sliding groove of the sliding rail, and each group of sliding gear protrusions is symmetrically distributed on both sides of the sliding groove. The sliding gear protrusions are used to block the sliding part above the sliding gear protrusions to fix the sliding end of the hand belt, so that the hand belt supports the handheld device which is sleeved with the handheld device shell.

[0004] In the prior art, the gear protrusions are arranged in a convex manner. When the sliding part slides, the friction between the gear protrusions and the sliding part is large, the gear protrusions are easily damaged or fall off, and the positioning function is lost, resulting in poor service life of the gear protrusions. UTILITY MODEL CONTENTS

[0005] The utility model discloses a positioning formula hand belt support and convex rail formula hand belt support, and aims to solve the problem of poor service life of the positioning structure of the hand belt support in the prior art.

[0006] The utility model discloses a positioning formula hand belt support and convex rail formula hand belt support, and aims to solve the problem of poor service life of the positioning structure of the hand belt support in the prior art.

[0007] The utility model discloses a positioning formula hand belt support and convex rail formula hand belt support, and aims to solve the problem of poor service life of the positioning structure of the hand belt support in the prior art.

[0008] Further, the belt fixing member comprises a fixed bead seat, the spring member is inside the fixed bead seat, the inner end of the spring member is fixedly arranged with the fixed bead seat, the fixed bead is movably arranged in the fixed bead seat, and the fixed bead is arranged in a movable manner relative to the fixed bead seat under force.

[0009] Further, the end of the fixed bead seat forms a seat limiting ring, the middle of the seat limiting ring forms a ring opening, and the ring opening is used for passing the fixed bead; the fixed bead is arranged in a spherical shape, and the diameter of the ring opening is smaller than the diameter of the fixed bead.

[0010] Further, the seat limiting ring has an inner ring surface arranged towards the inside, and the inner ring surface is arranged in a curved surface shape; when the fixed bead is in a pop-out state, the inner ring surface is arranged in a flat contact manner with the outer surface of the fixed bead.

[0011] Further, the sliding rail groove comprises an unfolding area and a sliding area, the unfolding area and the sliding area are arranged in an abutting and communicating manner, the unfolding area is arranged at the end, when the sliding member is in the unfolding area, the hand belt member is arranged in a bent supporting state; the belt fixing member is arranged at the junction position of the unfolding area and the sliding area, and the belt fixing member is used for limiting the sliding member from leaving the unfolding area.

[0012] Further, the positioning type hand belt support comprises two belt fixing members, and the two belt fixing members are arranged in a two-side corresponding manner.

[0013] Further, the fixed bead has an outer bead surface, when the fixed bead is embedded with the fixed bead hole, the outer bead surface is outside the fixed bead seat; the curvature of the fixed bead hole is arranged in a consistent manner with the curvature of the outer bead surface, and the area of the fixed bead hole is arranged in a consistent manner with the area of the outer bead surface.

[0014] Further, the sliding member comprises a sliding plate and a sliding block, the sliding plate and the sliding block are arranged in a superimposed manner, the sliding block is movably embedded in the sliding rail groove, the sliding plate is outside the sliding member, and the cross-sectional area of the sliding plate is greater than the cross-sectional area of the sliding block.

[0015] Further, the two sides of the sliding block respectively form sliding block grooves arranged in a through manner, the sliding rail member has two rail plates, and the two rail plates are respectively arranged in a one-to-one movably embedded manner with the two sliding block grooves.

[0016] The convex rail type hand belt support comprises a slide rail piece, a hand belt piece, a sliding piece and a belt fixing piece, the slide rail piece is arranged in assembly with a fixed object, the hand belt piece is arranged in butt joint with the sliding piece, the slide rail piece comprises a convex rail strip, the convex rail strip is arranged in convex in a direction away from the fixed object, and the convex rail strip is arranged in long strip shape, the sliding piece is provided with a sliding groove, the convex rail strip is embedded in the sliding groove, the sliding piece is arranged in movement relative to the convex rail strip to cause the hand belt piece to be arranged in a bent supporting state or an unfolded storage state, and the belt fixing piece comprises a fixing block bead and a spring piece, an inner end of the spring piece is arranged in fixation, an outer end of the spring piece is arranged in butt joint with the fixing block bead, and the spring piece is used to cause the fixing block bead to be arranged in a pop-out state.

[0017] The belt fixing piece is arranged on the sliding piece, the convex rail strip is provided with a fixing block hole, and the fixing block bead is arranged in embedded arrangement or disengagement arrangement with the fixing block hole.

[0018] Compared with the prior art, when the electronic device needs to be placed and supported, the user pushes the sliding piece to cause the sliding piece to be arranged in movement relative to the slide rail piece until the hand belt piece is arranged in the bent supporting state, at this time, the fixing block bead is arranged in embedded arrangement with the fixing block hole, the positioning force is applied through cooperation of the fixing block bead and the fixing block hole, the hand belt piece is guaranteed to be arranged in the bent supporting state, and thus the placement and support of the electronic device are guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is an exploded schematic view of the positioning type hand belt support provided by the utility model;

[0020] Figure 2 is a three-dimensional schematic view of the sliding piece of the positioning type hand belt support provided by the utility model;

[0021] Figure 3 is a cross-sectional schematic view of the belt fixing piece of the positioning type hand belt support provided by the utility model;

[0022] Figure 4 is a cross-sectional schematic view of the belt fixing piece of the positioning type hand belt support provided by the utility model;

[0023] Figure 5 is a cross-sectional schematic view of the second embodiment of the positioning type hand strap support provided by the utility model;

[0024] Figure 6 is a cross-sectional schematic view of the third embodiment of the convex rail type hand strap support provided by the utility model

[0025] Figure 7 is a cross-sectional schematic view of the fourth embodiment of the convex rail type hand strap support provided by the utility model;

[0026] Figure 8 is the exploded schematic view of the protective shell embodiment provided by the utility model;

[0027] Figure 9 is the exploded schematic view of the mobile power supply embodiment provided by the utility model;

[0028] Figure 10 is the exploded schematic view of the card bag piece embodiment provided by the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0030] The implementation of the utility model will be described in detail in combination with specific embodiments.

[0031] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the utility model, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the patent, for ordinary skilled persons in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0032] Referring to Figures 1-10 , a preferred embodiment provided by the utility model is shown.

[0033] The positioning type hand strap support comprises a sliding rail piece 1, a hand strap piece 2, a sliding piece 3 and a belt fixing piece 4; the belt fixing piece 4 comprises a fixed bead seat 43, a spring piece 42 is inside the fixed bead seat 43, the inner end of the spring piece 42 is fixedly arranged with the fixed bead seat 43, a fixed block bead 41 is movably arranged in the fixed bead seat 43, and the fixed block bead 41 is movably arranged relative to the fixed bead seat 43 under stress.

[0034] In this way, the spring member 42 and the fixed block bead 41 are arranged under the action of the fixed bead seat 43; at the same time, the fixed bead seat 43 plays a positioning and limiting deviation role on the elastic deformation of the spring member 42, facilitating the compression and elongation of the spring member 42.

[0035] The end of the fixed bead seat 43 forms a seat limiting ring 44, the middle part of the seat limiting ring 44 forms a ring opening for the fixed block bead 41 to pass through; the fixed block bead 41 is arranged in a spherical shape, and the diameter of the ring opening is smaller than the diameter of the fixed block bead 41; in this way, the fixed block bead 41 is prevented from being separated from the fixed bead seat 43, and the normal positioning effect of the fixed block bead 41 is ensured.

[0036] The seat limiting ring 44 has an inner ring surface arranged towards the inside, which is arranged in a curved surface shape; when the fixed block bead 41 is in a pop-out state, the inner ring surface is arranged in a flat contact with the outer surface of the fixed block bead 41; in this way, the fixed block bead 41 and the seat limiting ring 44 have a larger contact area, which improves the positioning stability of the fixed block bead 41, effectively prevents the shaking of the fixed block bead 41, and improves the positioning and matching effect of the fixed block bead 41 and the fixed block hole 5.

[0037] The sliding rail groove includes an unfolding area and a sliding area, which are arranged in abutment and communication; the unfolding area is arranged at the end; when the sliding member 3 is in the unfolding area, the hand belt member 2 is in a bent supporting state; the belt limiting member 4 is arranged at the junction position of the unfolding area and the sliding area, and is used to limit the sliding member 3 from separating from the unfolding area.

[0038] The relative movement of the sliding member 3 along the unfolding area and the sliding area realizes the switching of different states of the hand belt member 2; since the belt limiting member 4 is arranged at the junction position of the unfolding area and the sliding area, the belt limiting member 4 limits the sliding member 3 from separating from the unfolding area, ensures the appearance of the hand belt member 2 in a bent supporting state, and prevents the hand belt member 2 from being switched to an incorrect state, which affects the supporting use of the hand belt support.

[0039] The positioning type hand belt support includes two belt limiting members 4 arranged on both sides; in this way, the movement of the sliding member 3 is more stable, and the belt limiting member 4 has sufficient limiting effect on the hand belt member 2 under the synchronous action, which effectively prevents the hand belt member 2 from being switched to an incorrect state.

[0040] The fixed block bead 41 has an outer bead surface; when the fixed block bead 41 is embedded in the fixed block hole 5, the outer bead surface is outside the fixed bead seat 43; the curvature of the fixed block hole 5 is consistent with the curvature of the outer bead surface, and the area of the fixed block hole 5 is consistent with the area of the outer bead surface.

[0041] In this way, the fixed block bead 41 and the fixed block hole 5 have better matching effect, so that the fixed block bead 41 has sufficient limiting effect, which effectively prevents the hand belt member 2 from being switched to an incorrect state.

[0042] The sliding member 3 comprises a sliding plate 31 and a sliding block 32, the sliding plate 31 and the sliding block 32 are arranged in a superimposed manner, the sliding block 32 is movably embedded in the sliding rail groove, the sliding plate 31 is located outside the sliding member 3, and the cross-sectional area of the sliding plate 31 is larger than that of the sliding block 32; in this way, under the action of the sliding plate 31, the user's finger has sufficient operation space, which facilitates the user to apply a pushing force, reduces the reverse action on the user, avoids the occurrence of a tingling feeling, and improves the user's operation comfort of the sliding member 3.

[0043] The sliding block 32 is formed with a sliding block groove 33 on each side, the sliding block groove 33 is arranged in a through manner, the sliding rail member 1 has two rail plates 11, and the two rail plates 11 are movably embedded in the two sliding block grooves 33 in a one-to-one manner; in this way, the cooperation of the rail plate 11 and the sliding block groove 33 improves the movement stability of the sliding rail member 1.

[0044] The fixing object 6 can be a protective shell, which protects mobile phones, tablets and the like. The contact type hand strap support is assembled with the protective shell to support the mobile phones, tablets and the like, facilitating the placement and use of the devices and the handheld use of the devices.

[0045] The fixing object 6 can be a mobile power supply, which is used to provide power to electronic devices. The contact type hand strap support is assembled with the mobile power supply to support the mobile power supply, facilitating the placement and use of the mobile power supply and the handheld use of the mobile power supply.

[0046] The fixing object 6 can be a card bag member, which has a storage space to place and store bank cards, bus cards, credit cards and the like. The contact type hand strap support is assembled with the card bag member to support the card bag member, facilitating the placement and use of the card bag member and the handheld use of the card bag member. Embodiment

[0047] The positioning type hand strap support comprises a sliding rail member 1, a hand strap member 2, a sliding member 3 and a band fixing member 4. The sliding rail member 1 is assembled with a fixing object 6, the hand strap member 2 is in abutting arrangement with the sliding member 3, the sliding rail member 1 has a sliding rail groove, the sliding member 3 is movably embedded in the sliding rail groove, the sliding member 3 is movable relative to the sliding rail groove to make the hand strap member 2 in a bent supporting state or an unfolded storage state, the sliding rail groove has a side groove surface, the band fixing member 4 comprises a fixing block bead 41 and a spring member 42, the inner end of the spring member 42 is fixedly arranged, the outer end of the spring member 42 is in abutting arrangement with the fixing block bead 41, and the spring member 42 is used to make the fixing block bead 41 in a pop-out state; the band fixing member 4 is arranged on the sliding member 3, the side groove surface has a fixing block hole 5, and the fixing block bead 41 is in embedded arrangement or disengaged arrangement with the fixing block hole 5.

[0048] Thus, the positioning force is applied through the cooperation of the positioning bead 41 and the positioning hole 5, the hand strap 2 is in the bent supporting state, and the placement support of the electronic device is ensured; through the displacement of the positioning bead 41, the friction between the positioning bead 41 and the slide rail 1 is reduced, the wear risk of the positioning bead 41 and the slide rail 1 is reduced, the service life of the positioning bead 41 and the slide rail 1 is improved, and when the state is switched, the positioning bead 41 is displaced, the jamming is effectively avoided, it is more labor-saving, and the use experience of the hand strap support is better. Embodiment

[0049] The positioning type hand strap support comprises a slide rail 1, a hand strap 2, a sliding piece 3 and a strap fixing piece 4, the slide rail 1 is assembled with a fixed object 6, the hand strap 2 is in butt joint with the sliding piece 3, the slide rail 1 has a slide rail groove, the sliding piece 3 is movably embedded in the slide rail groove, the sliding piece 3 is movable relative to the slide rail groove to make the hand strap 2 in a bent supporting state or an unfolded storage state, the slide rail groove has a side groove surface, the strap fixing piece 4 comprises a positioning bead 41 and a spring piece 42, the inner end of the spring piece 42 is fixedly arranged, the outer end of the spring piece 42 is in butt joint with the positioning bead 41, and the spring piece 42 is used for making the positioning bead 41 in a pop-out state; the strap fixing piece 4 is arranged on the side groove surface, the sliding piece 3 has a positioning hole 5, and the positioning bead 41 is in embedded arrangement or disengagement arrangement with the positioning hole 5.

[0050] Thus, the positioning force is applied through the cooperation of the positioning bead 41 and the positioning hole 5, the hand strap 2 is in the bent supporting state, and the placement support of the electronic device is ensured; through the displacement of the positioning bead 41, the friction between the positioning bead 41 and the slide rail 1 is reduced, the wear risk of the positioning bead 41 and the slide rail 1 is reduced, the service life of the positioning bead 41 and the slide rail 1 is improved, and when the state is switched, the positioning bead 41 is displaced, the jamming is effectively avoided, it is more labor-saving, and the use experience of the hand strap support is better. Embodiment

[0051] The convex rail type hand strap support comprises a slide rail 1, a hand strap 2, a sliding piece 3 and a strap fixing piece 4, the slide rail 1 is assembled with a fixed object 6, the hand strap 2 is in butt joint with the sliding piece 3, the slide rail 1 comprises a convex rail strip 12, the convex rail strip 12 is convexly arranged in a direction away from the fixed object 6, and the convex rail strip 12 is in long strip arrangement, the sliding piece 3 has a sliding groove 34, the convex rail strip 12 is embedded in the sliding groove 34, the sliding piece 3 is movable relative to the convex rail strip 12 to make the hand strap 2 in a bent supporting state or an unfolded storage state, the strap fixing piece 4 comprises a positioning bead 41 and a spring piece 42, the inner end of the spring piece 42 is fixedly arranged, the outer end of the spring piece 42 is in butt joint with the positioning bead 41, and the spring piece 42 is used for making the positioning bead 41 in a pop-out state; the strap fixing piece 4 is arranged on the sliding piece 3, the convex rail strip 12 has a positioning hole 5, and the positioning bead 41 is in embedded arrangement or disengagement arrangement with the positioning hole 5.

[0052] Thus, the positioning force is applied through the cooperation of the positioning bead 41 and the positioning hole 5, the hand strap 2 is in the bent supporting state, and the placement support of the electronic device is ensured; through the displacement of the positioning bead 41, the friction between the positioning bead 41 and the slide rail 1 is reduced, the wear risk of the positioning bead 41 and the slide rail 1 is reduced, and the service life of the positioning bead 41 and the slide rail 1 is improved; meanwhile, when the state is switched, the positioning bead 41 is displaced, the jamming is effectively avoided, it is more labor-saving, and the use experience of the hand strap is better. Embodiment

[0053] The convex rail type hand strap comprises a slide rail 1, a hand strap 2, a sliding piece 3 and a belt positioning piece 4, the slide rail 1 is in assembly arrangement with a fixed object 6, the hand strap 2 is in butt joint arrangement with the sliding piece 3, the slide rail 1 comprises a convex rail strip 12, the convex rail strip 12 is in convex arrangement in the direction away from the fixed object 6, and the convex rail strip 12 is in long strip arrangement, the sliding piece 3 has a sliding groove 34, the convex rail strip 12 is embedded in the sliding groove 34, the sliding piece 3 is movable relative to the convex rail strip 12 to make the hand strap 2 in the bent supporting state or the unfolded storage state, the belt positioning piece 4 comprises a positioning bead 41 and a spring piece 42, the inner end of the spring piece 42 is in fixed arrangement, the outer end of the spring piece 42 is in butt joint arrangement with the positioning bead 41, and the spring piece 42 is used to make the positioning bead 41 in the ejection state; the belt positioning piece 4 is arranged on the convex rail strip 12, the sliding piece 3 has a positioning hole 5, and the positioning bead 41 is in embedded arrangement or disengagement arrangement with the positioning hole 5.

[0054] Thus, the positioning force is applied through the cooperation of the positioning bead 41 and the positioning hole 5, the hand strap 2 is in the bent supporting state, and the placement support of the electronic device is ensured; through the displacement of the positioning bead 41, the friction between the positioning bead 41 and the slide rail 1 is reduced, the wear risk of the positioning bead 41 and the slide rail 1 is reduced, and the service life of the positioning bead 41 and the slide rail 1 is improved; meanwhile, when the state is switched, the positioning bead 41 is displaced, the jamming is effectively avoided, it is more labor-saving, and the use experience of the hand strap is better.

[0055] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A positioning hand strap holder, characterized in that, The hand belt support includes a slide rail piece, a hand belt piece, a slide piece and a belt fixing piece. The slide rail piece is assembled with a fixed object. The hand belt piece is in butt joint with the slide piece. The slide rail piece has a slide rail groove. The slide piece is movably embedded in the slide rail groove. The slide piece is movable relative to the slide rail groove to cause the hand belt piece to be in a bent supporting state or an unfolded storage state. The slide rail groove has a side groove surface. The belt fixing piece includes a fixing block bead and a spring piece. The inner end of the spring piece is fixedly arranged. The outer end of the spring piece is in butt joint with the fixing block bead. The spring piece is used to cause the fixing block bead to be in a pop-out state. The belt fixing piece is arranged on the slide piece. The side groove surface has a fixing block hole. The fixing block bead is in embedded arrangement or disengagement arrangement with the fixing block hole. Alternatively, the belt fixing piece is arranged on the side groove surface. The slide piece has a fixing block hole. The fixing block bead is in embedded arrangement or disengagement arrangement with the fixing block hole.

2. The positioning hand strap holder according to claim 1, wherein The belt fixing piece includes a bead seat. The spring piece is inside the bead seat. The inner end of the spring piece is fixedly arranged with the bead seat. The fixing block bead is movably arranged in the bead seat.

3. The positioning hand strap holder according to claim 2, wherein The end of the bead seat forms a seat limiting ring. The middle of the seat limiting ring forms a ring opening. The ring opening is used to pass the fixing block bead. The fixing block bead is in spherical arrangement. The diameter of the ring opening is smaller than the diameter of the fixing block bead.

4. The positioning hand strap holder according to claim 3, wherein The seat limiting ring has an inner ring surface. The inner ring surface is arranged towards the inside. The inner ring surface is in curved surface arrangement. When the fixing block bead is in the pop-out state, the inner ring surface is in flat lapping abutment arrangement with the outer surface of the fixing block bead.

5. The positioning hand strap holder according to any one of claims 1 to 4, characterized in that The slide rail groove includes an unfolding area and a sliding area. The unfolding area and the sliding area are in butt joint and communication arrangement. The unfolding area is arranged at the end. When the slide piece is in the unfolding area, the hand belt piece is in the bent supporting state. The belt fixing piece is at the junction position of the unfolding area and the sliding area. The belt fixing piece is used to limit the slide piece from disengaging from the unfolding area.

6. The positioning hand strap holder according to any one of claims 1 to 4, wherein The positioning type hand belt support includes two belt fixing pieces. The two belt fixing pieces are in two side corresponding arrangement.

7. A positioning hand strap holder according to any one of claims 2-4, characterized in that The fixing block bead has an outer bead surface. When the fixing block bead is embedded in the fixing block hole, the outer bead surface is outside the bead seat. The curvature of the fixing block hole is consistent with the curvature of the outer bead surface. The area of the fixing block hole is consistent with the area of the outer bead surface.

8. The positioning hand strap holder according to any one of claims 2 to 4, wherein The slide piece includes a slide plate and a slide block. The slide plate and the slide block are in superimposed arrangement. The slide block is movably embedded in the slide rail groove. The slide plate is outside the slide piece. The cross-sectional area of the slide plate is larger than the cross-sectional area of the slide block.

9. The positioning hand strap holder according to claim 8, wherein The two sides of the slide block respectively form slide block grooves. The slide block grooves are in through arrangement. The slide rail piece has two rail plates. The two rail plates are respectively in one-to-one movably embedded arrangement with the two slide block grooves.

10. A convex rail hand strap support characterized by, The utility model provides a hand belt device, including slide rail piece, hand belt piece, sliding piece and banding piece, the slide rail piece is assembled with fixed object arrangement, the hand belt piece is with the sliding piece butt joint arrangement, the slide rail piece includes convex rail strip, the convex rail strip is in the direction away from fixed object convex arrangement, and the convex rail strip is long strip arrangement, the sliding piece has sliding groove, the convex rail strip embeds the sliding groove, the sliding piece is relative the convex rail strip moves for causing the hand belt piece to be bent support state or unfolded and is accomodated state, the banding piece includes fixed block bead and spring piece, the inner end of spring piece is fixed arrangement, the outer end of spring piece is with fixed block bead butt joint arrangement, and spring piece is used for causing fixed block bead to be pop -out state, the sliding piece is fixed on the fixed object, and the convex rail strip has fixed block hole, and fixed block bead is with fixed block hole embeds arrangement or is away from arrangement, or, the banding piece is fixed on the convex rail strip, and the sliding piece has fixed block hole, and fixed block bead is with fixed block hole embeds arrangement or is away from arrangement. The sliding piece is fixed on the fixed object, and the convex rail strip has fixed block hole, and fixed block bead is with fixed block hole embeds arrangement or is away from arrangement, or, the banding piece is fixed on the convex rail strip, and the sliding piece has fixed block hole, and fixed block bead is with fixed block hole embeds arrangement or is away from arrangement.

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