Electric elastic bandage structure

Abstract

The utility model discloses an electric elastic binding band structure which comprises a shell and a binding band, the band tail of the binding band is fixedly connected with the shell, the band head of the binding band penetrates through the shell, a motor assembly, a gear and a clutch assembly are arranged in the shell, the output end of the motor assembly is in transmission connection with the gear through the clutch assembly, and the binding band is provided with a rack used for being meshed with the gear. When the motor assembly is started, the rack is driven to tighten the bandage. When the bandage is pulled by external force, the clutch assembly is used for reducing damage of the external force to the motor assembly.

Description

Technical Field

[0001] The utility model relates to the field of binding belt equipment, in particular to an electric elastic binding belt structure. Background Art

[0002] The strap structure is an item used for fixing and tightening, and is usually used as a daily necessity such as a belt, a brace, and a safety belt. With the development of science and technology, an electric strap structure has appeared in the prior art. For example, a Chinese patent with the announcement number CN207075619U discloses an intelligent belt for a toilet care machine, including a belt buckle body, a belt connected to the belt buckle body at one end, a first micro motor is arranged in the belt buckle body, a gear is connected to the output shaft of the first micro motor, and a rack meshing with the gear, and the rack is fixed on the belt. When the first micro motor is started, it drives the rack to synchronously tighten or loosen the belt. The above-mentioned intelligent belt has the following problem: when there is a large external force pulling the belt, the rack will drive the gear and the output shaft of the first micro motor to rotate, which will cause the mechanical structure of the first micro motor to be damaged by force. In view of this, the utility model proposes an electric elastic strap structure to solve the above-mentioned problem. Utility Model Content

[0003] The utility model overcomes the shortcomings of the above-mentioned technology and provides an electric elastic binding belt structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An electric elastic band structure comprises a shell and a band, wherein the band tail is fixedly connected to the shell, and the band head passes through the shell, wherein a motor assembly, a clutch assembly, and a gear are arranged in the shell, wherein the output end of the motor assembly is connected to the gear transmission through the clutch assembly, and the band is provided with a rack for meshing with the gear; the motor assembly is started to drive the rack, thereby achieving the tightening of the band; when an external force pulls the band, the clutch assembly is used to reduce the damage of the external force to the motor assembly.

[0006] Preferably, the clutch assembly includes a fixed ring, a moving ring located inside the fixed ring, and a clutch output shaft; the clutch output shaft passes through the axis of the gear and is transmission-connected to the gear; the moving ring includes a coupling portion for transmission-connected to the output end of the motor assembly, the coupling portion is provided with at least two transmission portions around the axis of the coupling portion, the interval between adjacent transmission portions is a movable recess, and a locking member is provided in the movable recess; one end of the clutch output shaft is a transmission end, the transmission end is placed in a rotating shaft groove formed around the transmission portion, the locking member is passed through the transmission recess and the rotating shaft groove, and a transmission recess for contact of the locking member is provided on the outer periphery of the transmission end; when an external force pulls the binding strap, the gear rotates and drives the transmission end to rotate to the transmission recess and contact the locking member, and the transmission recess then pushes the locking member toward the transmission portion through static friction, so that the moving ring rotates.

[0007] Preferably, the distance between the center of the transmission recess and the inner surface of the fixing ring is greater than the width of the locking member, and the distance between the transmission recess and the inner surface of the fixing ring gradually decreases from the center to the left and right sides of the transmission recess, and the distance between the left and right sides of the transmission recess and the inner surface of the fixing ring are both smaller than the width of the locking member. When the locking member is opposite to the center of the transmission recess, the transmission end and the locking member are in a separated state; when the locking member is in contact with the parts close to the left and right sides of the transmission recess, the transmission end and the locking member are in an engaged state.

[0008] Preferably, the transmission end is a columnar structure formed by cutting a cross section of a cylinder in the vertical direction, the outer periphery of the transmission end includes a vertical section and an arc surface located between adjacent vertical sections, the transmission part is an arc surface whose size is adapted to the arc surface, and the transmission part is not connected to the arc surface in terms of transmission; the locking member is a cylindrical structure.

[0009] Preferably, the motor assembly comprises a motor and a reduction gear box, and the output end of the motor is transmission-connected to the coupling part via the reduction gear box.

[0010] Preferably, the shell includes an outer shell and a panel located at the front end face of the outer shell, the front end face of the outer shell is provided with a gear through hole for the gear to pass through; one side of the panel is hinged to the outer shell by an elastic hinge assembly, and the back of the panel is provided with a pressing portion, and the panel is spaced from the front end face of the outer shell by the pressing portion to form a channel for the strap to pass through; when the panel is flipped relative to the outer shell, the elastic hinge assembly generates a restoring force, and when the panel is not flipped, the panel presses the strap tightly against the front end face of the outer shell through the restoring force of the elastic hinge assembly.

[0011] Preferably, the elastic hinge assembly includes two hinge parts arranged on the back of the panel, a hinge shaft located inside the shell, and a torsion spring sleeved on the hinge shaft. The hinge part passes through the shell, and the two ends of the hinge shaft are respectively connected to the two hinge parts. Flipping the panel will drive the hinge shaft to rotate.

[0012] Preferably, a slot is provided on the surface of the hinge shaft, and arms are provided at both ends of the torsion spring. One of the arms of the torsion spring is engaged with the slot, and the other arm is pressed against the inner wall of the shell.

[0013] Preferably, the electric elastic band structure also includes a rotating connector, the tail of the band is fixedly connected to the rotating connector, the rotating connector is provided with a rotating part, the rotating part passes through the interior of the shell and is hinged to the hinge shaft, so that the rotating part can rotate relative to the shell.

[0014] Preferably, a circuit board and a battery for providing electrical energy to the circuit board and the motor are provided in the shell, the circuit board is provided with a pressure switch for controlling the operation of the motor, and a charging socket and a button are provided on the side of the shell, the charging socket is used to charge the battery, and the button is used to trigger the pressure switch.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. Due to the action of external force, the output end of the motor assembly rotates, which will cause the mechanical structure of the motor assembly to be damaged. The gear of the utility model is frictionally connected to the output end of the motor assembly through the clutch assembly, so that when there is an external force to pull the strap, the rack drives the gear to rotate, and the gear is connected to the output end of the motor assembly through the clutch assembly, so that the power transmitted to the output end of the motor assembly by the gear is reduced, thereby reducing the damage to the motor assembly caused by the external force in the process of pulling the strap.

[0017] 2. When the external force pulls the strap, the gear first needs to drive the transmission end to rotate to the transmission recess and engage with the locking piece, and the power transmitted by the gear to the output end of the motor assembly is reduced; the transmission recess then pushes the locking piece toward the transmission part, and the power transmitted by the gear to the output end of the motor assembly is further reduced, thereby reducing the damage to the motor assembly caused by the external force. In addition, the transmission end is a columnar structure formed by cutting the cross section of the cylinder in the vertical direction, which has a simple structure.

[0018] 3. One side of the panel is hinged to the shell through an elastic hinge assembly. When the panel is not flipped over, the panel presses the strap tightly against the front end of the shell through the elastic hinge assembly to prevent the strap from detaching from the shell; and under the action of the elastic hinge assembly, the panel can automatically reset after being flipped over. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of an electric elastic band structure of the utility model;

[0020] Figure 2 yes Figure 1 A cross-sectional view at AA;

[0021] Figure 3This is a rear view of an electric elastic band structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the interior of the rear shell of the utility model;

[0023] Figure 5 It is an exploded schematic diagram of the housing of the utility model;

[0024] Figure 6 It is an exploded schematic diagram of the clutch assembly of the utility model;

[0025] Figure 7 It is a schematic diagram of the connection between the clutch assembly and the motor assembly of the utility model;

[0026] Figure 8 It is an overall schematic diagram of the clutch assembly of the utility model;

[0027] Fig. 9 yes Figure 8 A cross-sectional view at BB of the clutch assembly is in a disengaged state;

[0028] Fig.10 yes Figure 8 A cross-sectional view at BB of the clutch assembly is in an engaged state;

[0029] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0031] Reference Figure 1-10 , an embodiment of an electric elastic band structure of the utility model is proposed:

[0032] An electric elastic band structure includes a housing and a band 1, wherein one end of the band 1 is fixedly connected to the housing, and the other end of the band 1 passes through the housing. A motor assembly 2, a clutch assembly 3, and a gear 31 are arranged in the housing, and the output end of the motor assembly 2 is transmission-connected to the gear 31 through the clutch assembly 3. The band 1 is provided with a rack 11 for meshing with the gear 31; when the motor assembly 2 is started, the rack 11 is driven, thereby achieving the tightening and loosening of the band 1.

[0033] like Figure 5-8As shown, the clutch assembly 3 includes a fixed ring 32, a moving ring 33 located inside the fixed ring 32, and a clutch output shaft 34. The clutch output shaft 34 passes through the axis of the gear 31, and the clutch output shaft 34 is a non-cylindrical structure, so that the clutch output shaft 34 can be connected to the gear 31 by transmission. The moving ring 33 includes a connecting shaft 331 for connecting to the output end of the motor assembly 2 by transmission, and the connecting shaft 331 is provided with at least two transmission parts 332 around the axis of the connecting shaft 331, and the interval between adjacent transmission parts 332 is a movable recess 333. A locking member 35 is provided in the movable recess 333; one end of the clutch output shaft 34 is a transmission end 36, and the transmission end 36 is placed in a rotating shaft groove 334 formed around the transmission part 332. The outer periphery of the transmission end 36 is provided with transmission recesses 361 corresponding to the number of the movable recesses 333, and the locking member 35 is penetrated between the transmission recess 361 and the movable recess 333. The distance between the center of the transmission recess 361 and the inner surface of the fixing ring 32 is greater than the width of the locking member 35; and the distance between the transmission recess 361 and the inner surface of the fixing ring 32 gradually decreases from the center of the transmission recess 361 to the left and right sides, and the distance between the left and right sides of the transmission recess 361 and the inner surface of the fixing ring 32 is less than the width of the locking member 35. Fig. 9 As shown, when the locking member 35 is aligned with the center of the transmission recess 361, the transmission end 36 and the locking member 35 are in a separated state; Fig.10 As shown, when the portion of the transmission recess 361 close to the arc surface 362 contacts the locking member 35 , the transmission end 36 and the locking member 35 are in an engaged state.

[0034] The utility model drives the rack 11 through the motor assembly 2 to achieve the process of tightening the strap 1 as follows: the motor assembly 2 drives the motion ring 33 to rotate, the transmission part 332 pushes the locking member 35, so that the locking member 35 contacts the transmission recess 361, the locking member 35 drives the transmission end 36 to rotate together, the clutch output shaft 34 drives the gear 31 to rotate, and the gear 31 drives the rack 11 to move linearly, and finally the tightening of the strap 1 is achieved. The clutch assembly 3 is used for transmission connection between the motor assembly 2 and the gear 31. Compared with the rack driven by the worm, the utility model drives the rack 11 through the gear 31, the contact area between the gear 31 and the rack 11 is large, the force transmission efficiency is high, and it is suitable for slow or fast adjustment of the tightness of the strap 1.

[0035] When an external force is applied to pull the strap 1, the clutch assembly reduces the power transmitted from the gear to the output end of the motor assembly. The process is as follows: When an external force is applied to pull the strap 1, the rack 11 will drive the gear 31 and the clutch output shaft 34 to rotate together. The transmission end 36 first rotates to the transmission recess 361 and contacts the locking member 35, so that the power transmitted from the gear 31 to the output end of the motor assembly 2 is reduced. At this time, the output end of the motor assembly 2 is not affected by the gear 31, which plays a buffering role. Then the transmission recess 361 pushes the locking member 35 toward the transmission part 332, and the power transmitted from the gear 31 to the output end of the motor assembly 2 is further reduced. At this time, the output end of the motor assembly 2 is still not affected by the gear 31. If the external force that pulls the strap 1 is small or the external force acts for a short time, the transmission recess 361 will not continue to drive the transmission part 332 to rotate through the locking member 35. If the external force acting on the dynamic pull strap 1 is large or the external force acts for a long time, the transmission recess 361 will continue to drive the transmission part 332 to rotate through the locking member 35. At this time, the motion ring 33 will drive the output end of the motor assembly 2, but the power transmitted to the output end of the motor assembly by the gear has gradually decreased.

[0036] The utility model can be applied to daily necessities such as waist belts, braces, and safety belts. It is inevitable that there will be situations where external forces will pull the strap 1. For example, when the strap 1 is worn on the user as a waist belt, the rise and fall of the abdomen when the user squats or sits down will cause the strap 1 to be pulled; for example, when the strap 1 is used as a brace, the strap head will often be pulled by external forces; for example, when the strap 1 is used as a safety belt, when the user leans forward during sudden braking, external forces will pull the strap 1. Moreover, rotating the rotor of the motor by external force will loosen or damage the mechanical structure of the motor assembly. The utility model connects the gear 31 and the output end of the motor assembly 2 through the clutch assembly 3, so that the power transmitted to the output end of the motor assembly 2 by the gear 31 is reduced, thereby reducing the damage to the motor assembly 2 by external forces during the process of manually pulling the strap 1.

[0037] Specifically, the transmission end 36 is a columnar structure formed by cutting a cross section of a cylinder in the vertical direction, and has a simple structure. The outer periphery of the transmission end 36 includes a vertical section and an arc surface 362 located between adjacent vertical sections. The transmission part 332 is an arc surface whose size matches the arc surface 362, and the transmission part 332 is not in transmission connection with the arc surface 362. The gap between the transmission part 332 and the arc surface 362 is smaller than the width of the locking member 35, and the locking member 35 cannot move between the moving part and the arc surface 362.

[0038] Specifically, the locking member 35 is a cylindrical structure, which reduces the friction between the locking member 35 and the transmission recess 361 .

[0039] The shell includes an outer shell, a panel 5 located at the front end of the outer shell, and the front end of the outer shell is provided with a gear through hole 61 for the gear 31 to pass through; one side of the panel 5 is hinged to the outer shell through an elastic hinge assembly, and a pressing portion 51 is provided on the back of the panel 5. The panel 5 is spaced from the front end of the outer shell by the pressing portion 51 to form a passage for the bandage 1 to pass through; when the panel 5 is flipped relative to the outer shell, the panel 5 is in an open state, and can be used to remove the head of the bandage 1 or to manually adjust the tightness of the bandage 1, and the elastic hinge assembly generates a restoring force. When the panel 5 is released, the panel 5 automatically resets by the restoring force of the elastic hinge assembly, and the panel 5 is in a closed state, and the panel 5 presses the bandage 1 tightly against the front end of the outer shell to prevent the bandage 1 from detaching from the outer shell.

[0040] like Figure 5-6 As shown, the elastic hinge assembly includes two hinge parts 52 arranged on the back of the panel 5, a hinge shaft 71 located inside the shell, and a torsion spring 72 sleeved on the hinge shaft 71. The hinge part 52 passes into the shell, and the two ends of the hinge shaft 71 are respectively connected to the two hinge parts 52. The surface of the hinge shaft 71 is provided with a card slot 711. Both ends of the torsion spring 72 are provided with arms, one of the arms of the torsion spring 72 is engaged with the card slot 711, and the other arm is pressed against the inner wall of the shell. The elastic hinge assembly is arranged inside the shell, has a simple structure, and is small in size, and occupies a small amount of space inside the shell, thereby reducing the volume of the shell.

[0041] Specifically, screw holes are provided at both ends of the hinge shaft 71, and rivets 73 penetrate from the outside of the shell into the inside of the shell and connect with the screw holes, so that the hinge shaft 71 is positioned inside the shell, and the hinge shaft 71 can rotate along itself. In order to further increase the stability of the hinge shaft 71, a positioning member 74 is provided inside the shell, and the positioning member 74 is fixedly connected to the shell. The positioning member 74 is provided with a positioning hole 741 for the hinge shaft 71 to pass through, and the aperture of the positioning hole 741 is adapted to the size of the hinge shaft 71.

[0042] The electric elastic band structure also includes a rotating connector 8, the tail of the band 1 is fixedly connected to the rotating connector 8, and the rotating connector 8 is provided with a rotating portion 81, which penetrates into the interior of the housing and is hinged to the hinge shaft 71, so that the rotating portion 81 can rotate relative to the housing. The hinge shaft 71 can be used for rotating the panel 5, and can also be used for rotating the rotating portion 81 and the tail of the band 1, which is highly practical and makes the electric elastic band structure simpler.

[0043] The housing is formed by the front cover 6 and the rear cover 9 being connected relative to each other, and the gear through hole 61 is provided on the front cover 6. The motor assembly 2 includes a motor 21 and a reduction gear box 22, and the output end of the motor 21 is transmission-connected to the coupling part 331 through the reduction gear box 22. The rear housing 9 is provided with a motor slot adapted to the size of the motor assembly 2. The reduction gear box 22 is fixedly connected to the rear housing 9, and the fixing ring 32 is clamped with the reduction gear box 22, so that the fixing ring 32 is fixed in the housing.

[0044] The housing is provided with a circuit board 23 and a battery 24 for providing power to the circuit board 23 and the motor 21. The circuit board 23 is provided with a pressure switch for controlling the operation of the motor 21. The side of the housing is provided with a charging socket 25 and a button 26. The charging socket 25 is used to charge the battery 24, and the button 26 is used to trigger the pressure switch. When the battery 24 is low on power, the tightness of the strap 1 can be adjusted by pulling the strap 1 by hand.

[0045] Specifically, a groove is provided on the back of the strap 1, and a plurality of straight teeth with equal spacing and parallel to each other are provided in the groove, and all the straight teeth in the groove form a rack 11, and the gear 31 is meshed with the rack 11 in the groove, and under the pressure of the panel 5, the gear 31 is difficult to be separated from the groove, and when the panel 5 is in a closed state, the gear 31 is firmly meshed with the rack 11. The strap 1 can be made of leather, plastic, rubber, silicone, braid, metal and other materials.

[0046] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. An electric elastic band structure, characterized in that: The invention comprises a shell and a binding belt (1), wherein the tail of the binding belt (1) is fixedly connected to the shell, and the head of the binding belt (1) passes through the shell. A motor assembly (2), a clutch assembly (3), and a gear (31) are arranged in the shell. The output end of the motor assembly (2) is transmission-connected to the gear (31) via the clutch assembly (3), and the binding belt (1) is provided with a rack (11) for meshing with the gear (31). When the motor assembly (2) is started, the rack (11) is driven, thereby achieving the tightening of the binding belt (1). When an external force pulls the binding belt (1), the clutch assembly (3) is used to reduce the damage of the external force to the motor assembly (2).

2. The electric elastic band structure according to claim 1, characterized in that: The clutch assembly (3) comprises a fixed ring (32), a moving ring (33) located inside the fixed ring (32), and a clutch output shaft (34); the clutch output shaft (34) passes through the axis of the gear (31) and is in driving connection with the gear (31); the moving ring (33) comprises a coupling portion (331) for driving connection with the output end of the motor assembly (2); the coupling portion (331) is provided with at least two transmission portions (332) around the axis of the coupling portion (331); the interval between adjacent transmission portions (332) is a movable recess (333); a locking member (35) is provided in the movable recess (333); the clutch output shaft (34) passes through the axis of the gear (31) and is in driving connection with the output end of the motor assembly (2); the moving ring (33) comprises a connecting shaft (331) for driving connection with the output end of the motor assembly (2); the connecting shaft (331) is provided with at least two transmission portions (332) around the axis of the connecting shaft (331); the interval between adjacent transmission portions (332) is a movable recess (333); a locking member (35) is provided in the movable recess (333); One end of the gear (34) is a transmission end (36), and the transmission end (36) is placed in a rotating shaft groove (334) formed around the transmission part (332). The locking member (35) is inserted between the transmission recess (361) and the rotating shaft groove (334). The outer periphery of the transmission end (36) is provided with a transmission recess (361) for the locking member (35) to contact. When an external force pulls the binding belt (1), the gear (31) rotates and drives the transmission end (36) to rotate to the transmission recess (361) and contact with the locking member (35), and the transmission recess (361) then pushes the locking member (35) toward the transmission part (332), so that the moving ring (33) rotates.

3. The electric elastic band structure according to claim 2, characterized in that: The distance between the center of the transmission recess (361) and the inner surface of the fixing ring (32) is greater than the width of the locking member (35); and the distance between the transmission recess (361) and the inner surface of the fixing ring (32) gradually decreases from the center to the left and right sides of the transmission recess (361); the distance between the left and right sides of the transmission recess (361) and the inner surface of the fixing ring (32) is less than the width of the locking member (35); when the locking member (35) and the center of the transmission recess (361) are opposite, the transmission end (36) and the locking member (35) are in a separated state; when the locking member (35) contacts the parts close to the left and right sides of the transmission recess (361), the transmission end (36) and the locking member (35) are in an engaged state.

4. An electric elastic band structure according to claim 2 or 3, characterized in that: The transmission end (36) is a columnar structure formed by cutting a cross section of a cylinder in a vertical direction; the outer periphery of the transmission end (36) includes a vertical section and an arc surface (362) located between adjacent vertical sections; the transmission part (332) is an arc surface whose size matches the arc surface (362), and the transmission part (332) is not in transmission connection with the arc surface (362); the locking member (35) is a cylindrical structure.

5. The electric elastic band structure according to claim 2, characterized in that: The motor assembly (2) comprises a motor (21) and a reduction gear box (22); the output end of the motor (21) is transmission-connected to the shaft connection portion (331) via the reduction gear box (22).

6. The electric elastic band structure according to claim 1, characterized in that: The shell comprises an outer shell and a panel (5) located at the front end face of the outer shell, the front end face of the outer shell is provided with a gear through hole (61) for the gear (31) to pass through; one side of the panel (5) is hinged to the outer shell by an elastic hinge assembly, the back of the panel (5) is provided with a pressing portion (51), and the panel (5) is spaced from the front end face of the outer shell by the pressing portion (51) to form a channel for the strap (1) to pass through; when the panel (5) is flipped relative to the outer shell, the elastic hinge assembly generates a restoring force, and when the panel (5) is not flipped, the panel (5) presses the strap (1) tightly against the front end face of the outer shell by the restoring force of the elastic hinge assembly.

7. The electric elastic band structure according to claim 6, characterized in that: The elastic hinge assembly comprises two hinge parts (52) arranged on the back of the panel (5), a hinge shaft (71) located inside the shell, and a torsion spring (72) sleeved on the hinge shaft (71); the hinge part (52) passes into the shell, and the two ends of the hinge shaft (71) are respectively connected to the two hinge parts (52); when the panel (5) is turned over, the hinge shaft (71) will drive the rotation of the hinge shaft.

8. The electric elastic band structure according to claim 7, characterized in that: A slot (711) is provided on the surface of the hinge shaft (71), and arms are provided at both ends of the torsion spring (72). One arm of the torsion spring (72) is engaged with the slot (711), and the other arm is pressed against the inner wall of the shell.

9. The electric elastic band structure according to claim 7, characterized in that: It also includes a rotating connection member (8), the tail of the strap (1) is fixedly connected to the rotating connection member (8), and the rotating connection member (8) is provided with a rotating portion (81). The rotating portion (81) penetrates into the interior of the shell and is hinged to the hinge shaft (71), so that the rotating connection member (8) can rotate relative to the shell.

10. The electric elastic band structure according to claim 6, characterized in that: A circuit board (23) and a battery (24) for providing electric energy to the circuit board (23) and the motor assembly (2) are arranged in the housing; the circuit board (23) is provided with a pressure switch for controlling the operation of the motor assembly (2); a charging socket (25) and a button (26) are arranged on the side of the housing; the charging socket (25) is used to charge the battery (24); and the button (26) is used to trigger the pressure switch.

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