CN220213804U - Impedance exerciser - Google Patents

Abstract

An impedance exerciser disclosed herein includes: the pillow comprises a body, a pillow support for forming impedance for head backward movement, an impedance mechanism for providing power for the pillow support, and an adjusting mechanism for adjusting impedance intensity. The body is also provided with an arm span adjusting device for changing the distance between the two supporting arms. According to the impedance exerciser provided by the utility model, as the two supporting arms are hinged with the body through the hinge mechanism, when the impedance exerciser is used, the two supporting arms can be rotated outwards by pulling the supporting arms to the two sides at the same time, so that the distance between the two supporting arms is enlarged, the arm extension is increased, and the impedance exerciser is convenient to pass through the head; through setting up the extension arm that can plug relative body, can change the distance between two support arm roots to adjust the size of whole impedance exerciser, can realize freely adjusting to different crowds' use habit.

Description

Impedance exerciser

Technical Field

The utility model relates to the field of sports equipment, in particular to equipment for performing impedance exercise on cervical vertebra muscle groups.

Background

With the popularization of electronic products, no matter work, study and daily life, people have a great deal of time in a low-head-voltage state with long time-out, or face to a computer or a mobile phone. Therefore, the incidence of cervical spondylosis is increased, and the people with the disease after the cervical spondylosis develop into generalization and younger from the original specific occupation. The occurrence and development of cervical spondylosis are closely related to the pathological changes of the muscular system around cervical vertebra, and the cervical muscle is easy to be degenerated and damaged due to the anatomical and physiological characteristics and biomechanical characteristics of the cervical muscle, and the dynamic and static balance imbalance of the cervical vertebra can be caused by the unbalance of the muscular tension after the degeneration and the strain of the cervical muscle, so that the pathological changes of the cervical vertebra bone joint system can be caused, and the bone joint diseases such as the protrusion of intervertebral disc, the thickening of ligament, the adhesion or the calcification and the like can be caused. Therefore, functional exercise of cervical muscle groups is particularly important.

The existing equipment for training cervical muscle groups is relatively few, and the structure is relatively simple. The head rest plate is hinged with the head rest plate, and a torsion spring is arranged between the head rest plate and the back rest plate. When the back rest plate is used, the back rest plate is fixed on a supporting tool such as a chair, the back part is attached to the back rest plate, the hindbrain is attached to the head rest plate, and therefore the head rest plate has an impedance effect under the action of the torsion spring when the head is bent backwards, and therefore neck muscle exercise is achieved.

The existing impedance exerciser needs to be fixed on a supporting tool before use, is complex in operation and inconvenient to use.

Disclosure of Invention

The utility model discloses an impedance exerciser, which aims to solve the problem that the existing impedance exerciser is inconvenient to use.

An impedance exerciser disclosed herein includes:

the device comprises a body, wherein two ends of the body are provided with supporting arms for fixing the body in use, and the body is also provided with an arm stretching adjusting device for changing the distance between the two supporting arms;

the pillow support is used for contacting with the hindbrain of a human body so as to form impedance for the backward movement of the head, the root of the pillow support is rotationally connected with the body, and the support arms are positioned on two sides of the pillow support;

the impedance mechanism comprises an elastic device for providing torque required by folding the pillow support towards the supporting arm.

As an improvement of the impedance exerciser, the arm extension adjusting device comprises a hinge mechanism arranged between the body and the supporting arms, at least one supporting arm is hinged with the body through the hinge mechanism, the hinge mechanism comprises a first hinge joint arranged on the body, a second hinge joint arranged on the supporting arm and a pin shaft for connecting the first hinge joint and the second hinge joint.

As an improvement of the resistance exercise machine of the present utility model, the pin shaft allows the support arm to be rotated outwardly with respect to the other support arm, thereby changing the distance between the two support arms.

As an improvement of the impedance exerciser, the impedance exerciser further comprises a second torsion spring for providing restoring force required by restoring the support arm, wherein the second torsion spring is sleeved on the pin shaft, the upper support leg of the second torsion spring is abutted with the support arm, and the lower support leg is abutted with the body.

As an improvement of the impedance exerciser, a limiting part for limiting the support arm to return to the limit position inwards is further arranged at the joint of the first hinge joint and the second hinge joint.

As an improvement of the impedance exerciser, a first inner joint surface is formed at the root of the first hinge joint, a first outer joint surface is formed at the end of the second hinge joint, a second inner joint surface is formed at the root of the second hinge joint, a second outer joint surface is formed at the end of the first hinge joint, when the support arm is in a reset state, the first inner joint surface is engaged with the first outer joint surface, and the second inner joint surface is engaged with the second outer joint surface.

As an improvement of the impedance exerciser, the body is further provided with an extension arm connected with the support arm, the body is provided with an adjusting cavity for accommodating the extension arm, and the adjusting device further comprises a locking piece arranged at the end part of the adjusting cavity and used for fixing the extension arm.

The application also discloses another impedance exerciser, comprising:

the body is provided with supporting arms on two sides for fixing the body during use;

the pillow support is used for contacting with the hindbrain of a human body so as to form impedance for the backward movement of the head, the root of the pillow support is rotationally connected with the body, and the support arms are positioned on two sides of the pillow support;

the impedance mechanism comprises an elastic device for providing torque required by folding the pillow support towards the direction of the supporting arm;

the back support is used for supporting the back of a human body, and the back support and the pillow support are respectively positioned at two ends of the body.

As an improvement of the resistance exercise machine, the back support is rotatably connected with the body, and the back support is provided with a folding position adjacent to the supporting arm and an unfolding position far away from the supporting arm.

Based on another improvement to the impedance exerciser, the present application also discloses an impedance exerciser comprising:

the two ends of the body are provided with supporting arms for fixing the body in use;

the pillow support is used for being contacted with the head of a human body so as to form impedance to head pitching action, the root of the pillow support is rotationally connected with the body, and the support arms are positioned on two sides of the pillow support;

the impedance mechanism comprises a first torsion spring for providing torsion required by the pillow to resist head pitching movement, namely providing torsion required by the pillow to fold towards the direction of the supporting arm, and a winding shaft for fixing the first torsion spring, wherein a first support leg of the first torsion spring is abutted with the pillow, and a second support leg of the first torsion spring is fixedly connected with the winding shaft;

the adjusting mechanism comprises an adjusting part positioned outside the body and a transmission part used for driving the winding shaft to rotate, and the adjusting part can drive the transmission part to move; the adjustment mechanism further comprises a locking device for locking the winding shaft against active rotation.

As an improvement of the resistance exercise machine, the transmission part comprises a rudder stock which extends along the radial direction of the winding shaft, the root part of the rudder stock is fixedly connected with the winding shaft, the end part of the rudder stock is fixedly connected with the adjusting part, and the body is provided with a clearance structure which is required by the rudder stock to rotate around the axis of the winding shaft.

As an improvement of the impedance exerciser, the locking device comprises a clamping protrusion arranged at the end part of the rudder stock and a plurality of clamping recesses arranged on the body, wherein the clamping recesses are distributed along the movement track of the clamping protrusion.

As an improvement of the resistance exercise machine of the present utility model, the locking device further comprises a switch member for controlling the catching convex to be separated from or embedded in the catching concave, and the switch member is positioned outside the body.

As an improvement of the impedance exerciser, the adjusting part is a handle arranged at the end part of the rudder stock, the handle is provided with a containing cavity for the clamp to stretch and retract, one side of the containing cavity, which is opposite to the body, is provided with an opening for the clamp to stretch and retract, and the switch piece is a sliding key or a pull handle for dragging the clamp to stretch into and out of the containing cavity.

As an improvement of the impedance exerciser, the accommodating cavity is internally provided with a spring for ejecting the clamping convex outwards of the accommodating cavity.

As an improvement of the impedance exerciser, the locking device is a self-locking device arranged on the transmission part, the adjusting part is in transmission connection with the winding shaft through the self-locking device, and the self-locking device allows the adjusting part to drive the winding shaft to passively rotate so as to limit the winding shaft to actively rotate.

As an improvement of the resistance exercise machine, the transmission part comprises a turbine arranged on the winding shaft and a worm which is matched with the turbine and is only a driving part, the root of the worm is meshed with the turbine, and the adjusting part is fixedly connected with the end part of the worm.

As an improvement of the impedance exercise machine, the transmission part comprises a driven shaft provided with a key groove and a planet carrier sleeved on the driven shaft, a roller used for pushing the driven shaft to rotate under the drive of the planet carrier is arranged between the planet carrier and the key groove, a fixed ring fixedly connected with the body is sleeved outside the planet carrier, the roller is abutted with the inner wall of the fixed ring under the extrusion of the key groove when the driven shaft is used as a driving part, so that a self-locking device is formed, and the driven shaft is in transmission connection with the winding shaft or the driven shaft is the winding shaft.

As an improvement of the impedance exerciser, the impedance exerciser further comprises a back support which is used for being abutted against the back of a human body in use, wherein the back support and the pillow support are respectively positioned at two sides of the body and are oppositely arranged.

According to the impedance exerciser provided by the utility model, the adjusting mechanism changes the elastic coefficient of the first torsion spring winding by driving the winding shaft to rotate, so that the free adjustment of the impedance intensity of equipment is realized, and the practical value of products is greatly improved; because the two support arms are hinged with the body through the hinge mechanism, when the two support arms are simultaneously pulled to two sides during use, the two support arms can be rotated outwards, so that the distance between the two support arms is enlarged, the arm extension is increased, and the head can conveniently pass through; through setting up the extension arm that can plug relative body, can change the distance between two support arm roots to adjust the size of whole impedance exerciser, can realize freely adjusting to different crowds' use habit.

Drawings

FIG. 1 is a schematic perspective view of an impedance exerciser according to a first embodiment of the present utility model;

FIG. 2 is a schematic perspective view of an impedance exerciser according to a first embodiment of the utility model at another angle

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is a perspective view of an impedance exerciser according to a first embodiment of the utility model;

FIG. 5 is a schematic diagram of an impedance mechanism according to a first embodiment of the present utility model;

FIG. 6 is a schematic structural view of an adjusting mechanism according to a first embodiment of the present utility model;

FIG. 7 is a perspective view of an impedance exerciser according to a second embodiment of the utility model;

FIG. 8 is an enlarged view of FIG. 7 at B;

fig. 9 is a schematic perspective view of an adjusting mechanism according to a third embodiment of the present utility model;

FIG. 10 is a perspective assembly view of an adjustment mechanism in a third embodiment of the utility model;

FIG. 11 is a partial cross-sectional view of FIG. 9;

fig. 12 is a perspective assembly view of an impedance exerciser according to a fourth embodiment of the present utility model.

Reference numerals and corresponding meanings in the embodiments of the present application:

the hinge comprises a body 1, a first hinge joint 10, an assembly cavity 100, a lower shell 101, a shaft bracket 102, a caulking groove 103, a clamping recess 11, a first inner joint surface 110, a gear groove 12, a second outer joint surface 120, a pin shaft 13, a second torsion spring 14, an extension arm 15, a positioning groove 16 and a cover body 17;

pillow support 2, mounting groove 20, cover plate 21, bolt hole column 22 and shaft cavity 23;

the support arm 3, the second hinge joint 30, the first outer joint surface 310, the second inner joint surface 320, the adjusting cavity 33, the fixing bolt 34 and the plugging plug 35;

a first torsion spring 4, a first leg 41, a second leg 42;

a winding shaft 5 and a fixing groove 50;

rudder stock 610, mounting ring 611, positioning boss 6110, snap boss 612, handle 613, receiving cavity 6130, opening 6131, sliding key 6132, worm gear 620, worm 621, first knob 622, keyway 630, planet carrier 631, fixed shaft 6310, flattened structure 6311, notch 6312, roller 632, fixed ring 633, fixed teeth 6330, second knob 634;

a back support 7.

Detailed Description

The utility model will be described in further detail below with reference to the drawings by means of specific embodiments.

Example 1

The utility model discloses an impedance exerciser, as shown in fig. 1 and 2, a body 1, a pillow support 2 positioned at the upper end part of the body 1, an impedance mechanism for generating resistance to the backward movement of the head by the pillow support 2, and an adjusting mechanism for adjusting the impedance intensity. The pillow support 2 in this embodiment is set at a position mainly in contact with the human hindbrain, and the pillow support 2 provides forward resistance when the head is reclined, thereby achieving the effect of resistance exercise. Wherein, body 1 both ends are equipped with support arm 3, and during the use, support arm 3 extends forward by neck both sides side, and body 1 is located the back neck. The support arm 3 may be held by both hands, or may be fixed to the chest, waist, or the like. The root of the pillow support 2 is rotationally connected with the body 1, the two support arms 3 are respectively positioned at the two sides of the pillow support 2, namely, the pillow support 2 is positioned at the middle position of the body 1, and the two support arms 3 are respectively positioned at the two ends of the body 1. The front surface of the pillow support 2 is an inner concave surface matched with the hindbrain of a human body, the hindbrain is attached to the pillow support 2 when in use, when the head overcomes the torsion of the impedance mechanism and leans backwards, the pillow support 2 is pushed to rotate backwards, and when the head swings forwards, the pillow support 2 rotates forwards along with the action of the impedance mechanism. This allows the neck muscles to be exercised by constantly repeating the pitching action of the head. The impedance mechanism includes a first torsion spring 4 for fixing a winding shaft 5 of the first torsion spring 4. In other embodiments of the present application, the pillow support 2 may also act on the mandible (chin) providing resistance to lifting up the mandible when it is depressed, thus providing the same exercise effect. The body 1 is positioned in front of the body when in use, and the support arm 3 is fixed by winding the back to the front of the body.

As shown in fig. 4 and 5, the first torsion spring is sleeved on the surface of the winding shaft 5, the first leg 41 of the first torsion spring 4 is abutted against the pillow support 2, and the second leg 42 of the first torsion spring 4 is fixedly connected with the winding shaft 5. In this embodiment, the surface of the winding shaft 5 is provided with a fixing portion, which is a fixing groove 50 extending along the axial direction of the winding shaft 5, and the second leg 42 is embedded in the fixing groove 50 to achieve a fixed connection with the winding shaft 5. With such a construction, the torsion spring can be easily assembled and disassembled, and of course, in other embodiments of the present application, the fixing portion may be other structures, such as a screw, and the second leg 42 may be fixed to the winding shaft 5 by welding. The torsion force generated by the first torsion spring 4 enables the pillow support 2 to return to the direction of folding with the support arm 3, so that the impedance effect is generated when the head of the user leans backwards. The pillow support 2 can be a plate or a hollowed-out frame structure.

The adjusting mechanism comprises an adjusting part and a transmission part, wherein the adjusting part is positioned outside the body 1, so that manual adjustment is convenient. The adjusting part can drive the transmission part to move from the outside of the body 1, and the transmission part can drive the winding shaft 5 to rotate, so that the winding action of the first torsion spring 4 is realized. By performing winding operation in the forward and reverse directions on the first torsion spring 4, the elastic coefficient thereof can be changed, thereby adjusting the resistance strength. The adjustment mechanism further comprises locking means for locking the winding shaft 5. When the adjustment of the resistance strength is completed by the adjustment portion, the rotation of the winding shaft 5 can be prevented by the locking means, so that the first coil spring 4 is maintained in the adjusted winding state.

The winding state of the first torsion spring 4 can be changed by controlling the rotation of the winding shaft 5 by the adjusting mechanism, thereby changing the elastic coefficient thereof. Under different impedance intensities, the torsion to be overcome by the same head leaning back angle is different, and a user can freely adjust the impedance intensity according to the self requirement, so that the exercise intensity is controlled. Therefore, the impedance exerciser disclosed by the embodiment can adapt to exercise requirements of different crowds, and meanwhile, the impedance intensity is randomly adjusted according to the conditions of the user, so that the best exercise effect is achieved, the use value of the product is greatly increased, and the impedance exerciser is more practical.

As shown in fig. 4 and 5, the first torsion spring 4 in this embodiment is a parallel double torsion spring, the bottom of the pillow support 2 is provided with a mounting groove 20 for fixing the first leg 41, the surface of the mounting groove 20 is provided with a cover plate 21 for covering the first leg 41, and the cover plate 21 is fixedly connected with the pillow support 2 through two bolts. The bottom of the mounting groove 20 is provided with a bolt hole column 22 for fixing the cover plate 21, and a U-shaped first supporting leg 41 is sleeved on the surface of the bolt hole column 22, so that the pillow support 2 is fixedly connected. The two second support legs 42 of the first torsion spring 4 are respectively embedded into the fixing grooves 50, so that the first torsion spring 4 is fixedly connected with the winding shaft 5.

In this embodiment, as shown in fig. 2-6, the transmission part includes a rudder post 610 extending radially along the winding shaft 5, the root of the rudder post 610 is fixedly connected with the winding shaft 5, the end is fixedly connected with the adjusting part, and the body 1 is provided with a clearance structure required when the rudder post 610 rotates around the axis of the winding shaft 5. As shown in fig. 6, the root of the rudder stock 610 is provided with a mounting ring 611 sleeved on the surface of the winding shaft 5, and the inner wall of the mounting ring 611 is provided with a positioning protrusion 6110 which can be embedded into the fixing groove 50. Thus, when the rudder stock 610 rotates around the axis of the winding shaft 5, the winding shaft 5 is driven to rotate, and the winding operation of the first torsion spring 4 is performed.

As shown in fig. 6, the locking device includes a locking protrusion 612 disposed at an end of the rudder post 610, and a plurality of locking recesses 11 disposed on the body 1, wherein the locking recesses 11 are distributed along a movement track of the locking protrusion 612, i.e., distributed on a circular arc track. The locking means further comprise a switch element for controlling the disengagement or engagement of the male 612 detent 11, the switch element being located outside the body 1. Specifically, the adjusting part is a handle 613 disposed at the end of the rudder post 610, the handle 613 is provided with a receiving cavity 6130 for the clamping protrusion 612 to stretch and retract, one side of the receiving cavity 6130, which is opposite to the body 1, is provided with an opening 6131 for the clamping protrusion 612 to stretch and retract, and the switch member is a sliding button 6132 for dragging the clamping protrusion 612 to enter and exit the receiving cavity 6130. The locking protrusion 612 can be separated from the locking recess 11 by pushing the sliding button 6132 backward, at this time, the handle 613 can be rotated to the upper side of the other locking recess 11, and the locking protrusion 612 can be engaged with the locking recess 11 by pushing the button 6132 forward, so that the rudder stock 610 is locked from the container, and the winding shaft 5 is locked from rotating by itself. Of course, in other embodiments of the present application, the switch member may also be a pull handle, that is, the tail of the clamping protrusion 612 may pass through the handle 613 and form a pull handle at the rear end of the handle 613, and the pull handle is pushed and pulled to control the telescopic movement of the clamping protrusion 612 in the accommodating cavity 6130.

In this embodiment, as shown in fig. 3, the winding shaft 5 is fixed inside the body 1, the body 1 is provided with a gear groove 12 through which the rudder stock 610 can pass, the gear groove 12 extends along an arc track, and the rudder stock 610 extends from the winding shaft 5 to the outside of the body 1 through the gear groove 12. The clearance structure is the gear groove 12.

As shown in fig. 6, for convenience in operation, a spring (not shown in the drawing) is disposed in the accommodating cavity 6130, and the spring applies to the elastic force of the convex clamping portion 612 opposite to the concave clamping portion 11, so that the convex clamping portion 612 automatically moves towards the concave clamping portion 11 under the action of the spring without manual pushing as long as the switch piece is released.

As shown in fig. 3, the detent 11 in this embodiment is a set of gear teeth distributed along a circular arc track, and the detent protrusion 612 is a claw engaged with the gear teeth. Of course, in other embodiments of the present application, the detent 11 may also be a set of gear holes distributed along a circular arc track, and the detent protrusion 612 may be a positioning pin that may be inserted into the gear holes.

When the resistance exerciser disclosed in this embodiment adjusts the resistance intensity, the sliding button 6132 is pushed backward to disengage the clamping protrusion 612 from the clamping recess 11, and then the handle 613 is moved to rotate the rudder post 610 to a predetermined angle, and then the sliding button 6132 is released.

Further, as shown in fig. 4, the root of the pillow support 2 is further provided with a shaft cavity 23 sleeved outside the winding shaft 5 and the first coil spring 4, and the pillow support is hinged with the body 1 through the shaft cavity 23 and the winding shaft 5. The shaft cavity 23 is formed by buckling the cover plate 21 with the root of the pillow support 2. The middle part of the shaft cavity 23 accommodates the second coil spring 4, and two sides of the shaft cavity are sleeved on the surface of the winding shaft 5, so that the shaft cavity is in rotary connection with the winding shaft 5. The center of the body 1 is provided with an assembly cavity 100 for accommodating the shaft cavity 23 and the winding shaft 5, and the inner surface of the assembly cavity 100 is an inner cylindrical surface matched with the shaft cavity 23. The body 1 further comprises a lower shell 101 covered on the assembly cavity 100, and the lower shell 101 is fixedly connected with the root of the body 1.

Example two

In this embodiment, as shown in fig. 7 and 8, the locking device is a self-locking device disposed on the transmission portion, the adjusting portion is in transmission connection with the winding shaft 5 through the self-locking device, and the self-locking device allows the adjusting portion to drive the winding shaft 5 to passively rotate, so as to limit the active rotation of the winding shaft 5.

Specifically, as shown in fig. 8, in this embodiment, the transmission part includes a worm wheel 620 disposed on the winding shaft 5, and a worm 621 adapted to the worm wheel 620, the root of the worm 621 is engaged with the worm wheel 620, the end portion extends outwards through the body 1, and the adjustment part is a first knob 622 fixed to the end portion of the worm 621. Wherein, turbine 620 is fixedly connected with winding shaft 5, and first knob 622 is screwed to drive worm 621 to rotate, so that winding shaft 5 is driven to rotate through the transmission of worm 621 and turbine 620. A shaft bracket 102 for fixing the worm 621 is also arranged in the body 1, and a bearing bush which is connected with the worm 621 in a sliding way is arranged on the inner side of the shaft bracket 102. The worm 621 in this embodiment can only be used as a driving member to drive the worm wheel 620 to rotate, and cannot be used as a driven member to rotate under the driving of the worm wheel 620, that is, the lead angle of the worm is smaller than the contact friction angle of the worm wheel and the worm. In order to achieve a better self-locking effect, the reduction ratio of the worm wheel to the worm is larger than 40 in the embodiment.

The resistance exercise machine disclosed in this embodiment controls the rotation of the winding shaft 5 through worm and gear transmission, and the self-locking structure of the worm and gear enables the transmission part to have a unidirectional transmission function, so that torque can be transmitted from the worm 621 to the turbine 620.

Example III

The present embodiment is an improvement on the basis of the second embodiment, as shown in fig. 9-11, the transmission part includes a driven shaft provided with a key slot 630, and a planet carrier 631 sleeved on the driven shaft, a roller 632 serving as a cylindrical key is arranged between the planet carrier 631 and the key slot 630, and a fixing ring 633 fixedly connected with the body 1 is sleeved outside the planet carrier 631. A cover 17 for accommodating the transmission part is arranged in the body 1, and one side of the cover 17 away from the winding shaft 5 is fixedly connected with the shell of the body 1. The outer surface of the fixing ring 633 is provided with fixing teeth 6330, and a caulking groove 103 matched with the fixing teeth 6330 is formed at a corresponding position of one side of the cover 17 facing the winding shaft 5, so that the fixing ring 633 is embedded into the caulking groove 103 and cannot rotate relative to the body 1. The driven shaft may be used as the winding shaft 5 or a transmission shaft in transmission relation to the winding shaft 5. The winding shaft 5 serves as a driven shaft in this embodiment. The key groove 630 may be a flat key groove or a curved key groove, and this embodiment is described by taking a flat key groove as an example.

Specifically, as shown in fig. 10 and 11, in this embodiment, the adjusting portion is a second knob 634 located outside the body 1, the planet carrier 631 is fixedly disposed at one end of the body 1, a fixed shaft 6310 is disposed at an outer end of the planet carrier 631, a flattening structure 6311 is disposed on a surface of the fixed shaft 6310, and the second knob 634 is sleeved on the fixed shaft 6310 and realizes synchronous rotation with the planet carrier 631 through the flattening structure 6311. The periphery of the planet carrier 631 is provided with a notch 6312 for accommodating the roller 632, and the roller 632 can contact with the key slot 630 and the inner wall of the fixing ring 633 through the notch 6312. Wherein the gap 6312 is matched in width to the roller 632 and the width of the keyway 630 is less than the diameter of the roller 632. With this design, when the second knob 634 is screwed, the planet carrier 631 as a driving member converts a part of the pushing force of the roller 632 into an oblique pressure to the key groove 630, so that the roller 632 receives a greater friction force at the notch 6312 than the holding force applied by the surface of the key groove 630, and the roller 632 only plays a key transmission role. Thus, the carrier 631 pushes the winding shaft 5 to rotate through the rollers 632.

When the second knob 634 is released, the winding shaft 5 tends to return under the influence of the first torsion spring 4. At this time, the winding shaft 5 acts as a driving member (driving member), and the two sides of the key groove 630 apply upward holding force to the rollers 632, so that the rollers 632 are pressed against the inner wall of the fixed ring 633, and thus the reaction force from the inner wall of the fixed ring 633 and the pressure applied by the key groove 630 clamp the rollers 632 between the fixed ring 633 and the key groove 630, and at this time, the rollers 632 cannot transmit torque to the planet carrier, so that the planet carrier 631 does not act. That is, when the winding shaft 5 is used as the driving member, since the roller 632 is locked between the key slot 630 and the fixing ring 633, unidirectional self-locking is achieved, and it is ensured that the winding shaft 5 cannot rotate by itself under the action of the first torsion spring 4.

In this embodiment, the winding shaft 5 is utilized as the self-locking effect of the roller 632 when the driving member is used, so that the transmission part can transmit torque and simultaneously serve as a locking device, and the impedance exerciser does not need to perform a locking operation independently after adjusting the impedance strength, so that the product operation is more convenient.

Example IV

When the impedance exerciser is used, the neck part is required to be arranged between the two support arms 3, so that the head part can pass through more conveniently when the distance between the two support arms 3 is larger, but the distance between the two support arms 3 is not in accordance with the ergonomic design when the impedance exerciser is used too much, and the impedance exerciser can be extremely forceful.

To solve this problem, this embodiment improves the solutions of the first and second embodiments, and the impedance exerciser disclosed in this embodiment is shown in fig. 4, where the body 1 is further provided with an arm span adjusting device for changing the distance between the two support arms 3.

The arm span adjusting device comprises a hinge mechanism arranged between the body 1 and the supporting arms 3, and at least one supporting arm 3 is hinged with the body 1 through the hinge mechanism. Specifically, the hinge mechanism includes a first hinge joint 10 provided to the body 1, a second hinge joint 30 provided to the support arm 3, and a pin 13 connecting the first hinge joint 10 and the second hinge joint 30. The pin 13 allows the support arm 3 to be rotated outwardly with respect to the other support arm 3, thereby changing the distance between the two support arms 2. That is, the support arm 3 can be rotated in a direction opposite to the other support arm 3, so that the distance between the two support arms 3 becomes large and passes through the head.

Further, the arm extension adjusting device further comprises a second torsion spring 14 for providing restoring force required by restoring the support arm 3, the second torsion spring is sleeved on the pin shaft 13, the upper support leg of the second torsion spring is abutted with the support arm 3, and the lower support leg is abutted with the body 1. The outer side of the second hinge joint 30 is also provided with a blocking plug 35, and the blocking plug 35 is fixedly connected with the end part of the pin shaft 13. The blocking plug 35 fixes the support arm 3 and the second torsion spring 14 at the first hinge joint 10, so as to prevent the first hinge joint 10 and the second torsion spring 14 from being axially separated along the pin shaft 13. The joint of the first hinge joint 10 and the second hinge joint 30 is also provided with a limiting part for limiting the limit position which can be reached by the inward resetting of the support arm 3.

Specifically, as shown in fig. 4, the root of the first hinge joint 10 is formed with a first inner abutment surface 110, the end of the second hinge joint 30 is formed with a first outer abutment surface 310, the root of the second hinge joint 30 is formed with a second inner abutment surface 320, and the end of the first hinge joint 10 is formed with a second outer abutment surface 120. The pin shaft 13 is fixedly arranged on the surface of the first hinge joint 10 and is arranged along the vertical direction. The first inner bonding surface 110, the first outer bonding surface 310, the second inner bonding surface 320, and the second outer bonding surface 120 are eccentric surfaces with respect to the axis of the pin shaft 13, that is, the four bonding surfaces are cylindrical surfaces, and the pin shaft 13 is not located at the center of the cross sections of the four bonding surfaces, or the four bonding surfaces are elliptical cylindrical surfaces.

With such a design, when the support arm 3 is in the reset state, the first inner bonding surface 110 is engaged with the first outer bonding surface 310, and the second inner bonding surface 320 is engaged with the second outer bonding surface 120. Because the four fitting surfaces which are mutually fit at the moment are all eccentric surfaces, the supporting arm 3 cannot continuously rotate inwards at the moment and can only rotate outwards under the action of external force. Therefore, the first hinge joint 10 and the second hinge joint 30 simultaneously serve as a stopper.

In this embodiment, the two support arms 3 are hinged to the body 1 through the hinge mechanism, and when in use, the two support arms 3 can be rotated outwards by pulling the support arms 3 to two sides simultaneously, so that the distance between the two support arms 3 is enlarged, the arm extension is enlarged, and the head can be conveniently penetrated.

Further, as shown in fig. 12, the body 1 is further provided with an extension arm 15 for connection with the support arm 3, the body 1 is provided with an adjusting cavity 33 for accommodating the extension arm 15, and the adjusting device further includes a locking member provided at an end of the adjusting cavity 33. In particular, the extension arm 15 can be pulled out of the adjustment chamber 33 by a certain length, thereby increasing the distance between the two support arms 3 after being reset. Conversely, the distance between the two support arms 3 after being reset can be reduced by retracting the extension arm 15 into the adjusting cavity 33. The locking piece is a fixed bolt 34 arranged at the end part of the adjusting cavity 33, the fixed bolt 34 is provided with an adjusting bolt, and the fixed bolt 34 can be tightened or loosened by screwing the adjusting bolt, so that the locking and the inserting and the pulling of the extension arm 15 are controlled.

Because of certain differences in the age and body shape of the user, tall persons are suitable for equipment with larger spacing between the extension arms 15, while short persons may not be ergonomic with the same equipment. In this embodiment, the distance between the root parts of the two support arms 3 can be changed by arranging the extension arm 15 which is pluggable relative to the body 1, so that the size of the whole impedance exerciser can be adjusted, and the free adjustment of the use habit of different people can be realized.

Example five

When the resistance exercise device is used, the stress balance of the device is mainly realized through the joint of the pillow support 2, the body 1 and the neck and shoulder and the three force points of the supporting arm 3, and the three force points are not symmetrical, so the balance is controlled mainly by holding the supporting arm 3 by hands. Thus, the fatigue of arms is caused by a long service time, so that the support arm 3 is not held stably, and the exercise effect is affected.

In order to solve the problem, the present embodiment is improved on the basis of the first three embodiments, and as shown in fig. 1-3, 4 and 12, the impedance exerciser disclosed in the present embodiment is further provided with a back support 7 below the body 1, and the back support 7 is opposite to the pillow support 2, i.e. the pillow support 2 is located at the upper end of the body 1, and the back support 2 is located at the lower end of the body 1. The two support arms 3 are respectively positioned at two sides of the back support 2. The back support 7 can be a plate material or a hollowed-out frame body structure.

When the equipment is used for exercise, the force points of the pillow support 2, the support arm 3 and the back support 7 are basically centrosymmetric relative to the winding shaft 5, so that the back support 7 participates in the stress balance, and the equipment can be stabilized only by holding the support arm 3 with smaller force.

Further, the back support 7 is rotatably connected with the body 1, and two extreme positions of a rotation track of the back support 7 correspond to a folding position and an unfolding position respectively. Specifically, when the back support 7 is rotated to an angle adjacent to the support arm 3, it is in the folded position, and when the back support 7 is rotated away from the support arm 3, it is in the unfolded position, at an angle of substantially 120 degrees to the support arm 3. The bottom of the body 1 is provided with a positioning groove 16 for limiting the rotation angle of the bottom of the back support 7, and the back support 7 is in a folded position when being rotated to be in contact with the first edge of the positioning groove 16, and is in an unfolded position when being rotated to be in contact with the second edge of the positioning groove 16.

When the device is used, the back support 7 is rotated to the unfolding position, then the head part passes through the two support arms 3, at the moment, the pillow support 2 is contacted with the hindbrain, the back support 7 is contacted with the back part, the support arms 3 are held by two hands, and the three stress points form a mechanical triangle model, so that the device is more labor-saving and easier to operate when in use. Meanwhile, the back support 7 can be folded, occupies small space and is convenient to transport and carry.

The resistance exercise machine provided by the utility model can change the winding state of the first torsion spring by controlling the rotation of the winding shaft through the adjusting mechanism, so that the elastic coefficient of the resistance exercise machine is changed. Under different impedance intensities, the torsion to be overcome by the same head leaning back angle is different, and a user can freely adjust the impedance intensity according to the self requirement, so that the exercise intensity is controlled. Therefore, the impedance exerciser disclosed by the embodiment can adapt to exercise requirements of different crowds, and meanwhile, the impedance intensity is randomly adjusted according to the conditions of users, so that the best exercise effect is achieved, the use value of the product is greatly increased, and the impedance exerciser is more practical; the rotation of the winding shaft is controlled through worm and gear transmission, the transmission part has a unidirectional transmission function through the self-locking structure of the worm and gear, so that torque can be transmitted from the worm to the turbine, and the transmission part simultaneously serves as a locking device without independently adding a locking structure, so that the resistance exercise machine is more convenient to operate; the self-locking effect of the roller is utilized when the winding shaft is used as the driving piece, so that the transmission part can transmit torque and simultaneously serve as a locking device, and the impedance exerciser does not need to be independently locked after adjusting the impedance strength, so that the product operation is more convenient; the supporting arms are rotatably connected with the body, so that the distance between the two supporting arms can be adjusted, and the head can conveniently pass through the body; the foldable back support is arranged, so that the equipment is more labor-saving when in use, does not occupy space after being folded, and is convenient to transport and carry.

The foregoing is a further detailed description of the utility model in connection with specific embodiments, and it is not intended that the utility model be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions can be made without departing from the inventive concept.

Claims (9)

1. An impedance exerciser, comprising:

the device comprises a body, wherein two ends of the body are provided with supporting arms for fixing the body in use, and the body is also provided with an arm stretching adjusting device for changing the distance between the two supporting arms;

the pillow support is used for contacting with the hindbrain of a human body so as to form impedance for the backward movement of the head, the root of the pillow support is rotationally connected with the body, and the support arms are positioned on two sides of the pillow support;

the impedance mechanism comprises an elastic device for providing torque required by folding the pillow support towards the supporting arm.

2. The resistance exercise machine of claim 1, wherein the arm extension adjustment device includes a hinge mechanism disposed between the body and the support arms, at least one of the support arms being hinged to the body by the hinge mechanism, the hinge mechanism including a first hinge joint disposed to the body, a second hinge joint disposed to the support arms, and a pin connecting the first hinge joint and the second hinge joint.

3. The resistance exercise machine of claim 2, wherein said pins allow said support arms to rotate outwardly relative to the other of said support arms, thereby changing the distance between the two support arms.

4. The resistance exercise machine of claim 2 or 3, further comprising a second torsion spring for providing a restoring force required for restoring the support arm, the second torsion spring being sleeved on the pin, an upper leg of the second torsion spring being in abutment with the support arm, a lower leg being in abutment with the body.

5. The resistance exerciser of claim 3, wherein the first hinge joint and the second hinge joint are further provided with a limiting portion for limiting inward return of the support arm to a limit position.

6. The resistance exercise machine of claim 5, wherein the root portion of the first hinge joint is formed with a first inner abutment surface, the end portion of the second hinge joint is formed with a first outer abutment surface, the root portion of the second hinge joint is formed with a second inner abutment surface, the end portion of the first hinge joint is formed with a second outer abutment surface, the first inner abutment surface is engaged with the first outer abutment surface and the second inner abutment surface is engaged with the second outer abutment surface when the support arm is in the reset condition.

7. The resistance exercise machine of any one of claims 1-3 or 5-6, wherein said body is further provided with an extension arm for connection with said support arm, said body is provided with an adjustment cavity for receiving said extension arm, and said adjustment device further comprises a locking member disposed at an end of said adjustment cavity for securing said extension arm.

8. An impedance exerciser, comprising:

the body is provided with supporting arms on two sides for fixing the body during use;

the pillow support is used for contacting with the hindbrain of a human body so as to form impedance for the backward movement of the head, the root of the pillow support is rotationally connected with the body, and the support arms are positioned on two sides of the pillow support;

the impedance mechanism comprises an elastic device for providing torque required by folding the pillow support towards the direction of the supporting arm;

the back support is used for supporting the back of a human body, and the back support and the pillow support are respectively positioned at two ends of the body.

9. The resistance exercise machine of claim 8, wherein said back rest is rotatably connected to said body, said back rest having a folded position adjacent said support arm and an unfolded position remote from said support arm.