CN210125132U

CN210125132U - Adjustable tension device for rehabilitation instrument or fitness instrument

Info

Publication number: CN210125132U
Application number: CN201920942078.3U
Authority: CN
Inventors: 代青枝
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-03-06
Anticipated expiration: 2029-06-21

Abstract

The utility model belongs to the technical field of medical treatment rehabilitation apparatus or body-building apparatus manufacturing, concretely relates to tension device with adjustable be used for rehabilitation apparatus or body-building apparatus, major structure includes: the spring fixing device comprises a spring frame, a guide rod, an upper fixing seat plate, a limiting balancing weight, a balancing weight groove, a positioning hole, a lower fixing seat plate, a selective switch fixing plate, an upper clamping plate, a selective switch jack, a spring assembly, a fixing bolt, a bolt clamping groove and a bolt hole; the main body structure is simple, the design concept is ingenious, the use requirements of different rehabilitation stages of rehabilitation personnel and the same personnel in different degrees can be realized through selection of a plurality of different tension states, tension adjustment can not be carried out in the use process, the situation that the user is injured due to large tension fluctuation is effectively avoided, the installation is quick and flexible, the use is safe and convenient, the manufacturing cost is low, the appearance is attractive, the application effect is friendly, and the market prospect is wide.

Description

Adjustable tension device for rehabilitation instrument or fitness instrument

The technical field is as follows:

the utility model belongs to the technical field of medical treatment rehabilitation apparatus or body-building apparatus manufacturing, concretely relates to tension device with adjustable be used for rehabilitation apparatus or body-building apparatus.

Background art:

the rehabilitation apparatus is used for performing rehabilitation training on a patient by a therapist with the help of a certain apparatus, or the therapist guides and helps the patient to train by using the apparatus, the apparatus is the rehabilitation apparatus, the fitness apparatus is an apparatus for realizing a training target aiming at a specific muscle group through different apparatuses, the rehabilitation apparatus and the fitness apparatus stimulate muscle movement through a correct mode to achieve the aim of stimulating nerves, stretch and compress muscles, improve the reflux pressure of channels and vessels, improve blood circulation, increase the activity of joints, reduce spasm, soften limbs, keep or recover walking ability, enhance the coordination ability of four limbs, promote metabolism, blood circulation and intestinal peristalsis, prevent deep channel thrombosis and urinary system infection, improve the flexibility of hands and feet, enhance muscle strength and improve the function of a cardiovascular system, and the tension structure in the rehabilitation apparatus and the fitness apparatus is an important component thereof, the existing tension devices of rehabilitation instruments and fitness instruments are also various; chinese patent 201120146034.3 discloses a portable pulling force body-building device, which comprises a pulling force device and a pulling rope connected with the pulling force device, the portable pulling force body-building device is provided with a pedal, a box body is fixed on the pedal, the pulling force device is positioned in the box body, the pulling rope extends out of the box body, the optimization is further carried out, the pulling force device is connected with a force adjusting device, the force adjusting device is provided with a force adjusting knob, the force adjusting device is positioned in the box body, and the force adjusting knob extends out of the box body; chinese patent 201811072164.X discloses a multifunctional fitness equipment, which comprises a double-rod main support frame and a double-rod auxiliary support frame, and a front plate and a rear plate which are arranged at the tail ends of the bottoms of the double-rod main support frame and the double-rod auxiliary support frame, the top ends of the double-rod auxiliary support frame are connected on the double-rod main support frame through a variable hinge, the double-rod main support frame is movably provided with a waist fixing device, the top of the double-rod main support frame is provided with a rotating handle and transverse caster wheels, a first tension device is arranged at the joint of the double-rod main support frame and the front plate, a second tension device is arranged on the double-rod auxiliary support frame, one end of the first tension device extends to the rear plate, the two ends of the front plate and the rear plate are respectively provided with a fixed rotating wheel set, the front plate is provided with a seat cushion, the foot plate is arranged on the rear plate corresponding to the seat cushion, so that more functional exercise modes are provided, the occupied space is small, and the movement is convenient; chinese patent 201420504858.7 discloses a weight-reducing balance rehabilitation training device, which comprises an underframe, wherein a driving roller is installed at the front end of the underframe, a driven roller is installed at the rear end of the underframe, a running belt is wrapped on the driving roller and the driven roller, a vertical installation sleeve is respectively arranged on the left side and the right side of the underframe, a vertical support rod which can be locked in a sliding way is inserted in the vertical installation sleeve, a transverse connecting rod is arranged between the two vertical support rods, two sliding seats which can be locked in a sliding way are arranged on the transverse connecting rod, a first fixed pulley is installed on the lower part of each sliding seat, a suspension waistcoat is arranged below the transverse connecting rod, two shoulder parts of the suspension waistcoat are respectively connected with a pull rope, the pull rope passes through, then the stretching wire extends downwards by bypassing a second fixed pulley arranged on the vertical supporting rod, and the tail end of the pulling rope is connected with a pulling force device with adjustable pulling force, so that the stretching wire has good effects on the recovery of the lower limb function of a patient and the correction of left-right unbalance of the body; chinese patent 201611031989.8 discloses a medical technology assisted rehabilitation device, wherein the tension device comprises a pull rod, a bolt, an outer nut of the rod, a spring and a bolt seat, the bolt is hollow, the pull rod is arranged in the bolt, the spring is arranged outside the bolt, the left end of the pull rod is fixedly connected with the left end of the spring through a nut, the right end of the spring is movably connected with the outer side wall of the bolt through the outer nut of the rod, the right end of the outer side wall of the bolt is fixedly connected with a bed body through the bolt seat, the front surface of the bed body is provided with a connecting rod, the left end of the connecting rod is movably connected with the right end of the pull rod, and the right end of the connecting rod is movably connected with a fixed plate, the medical technology assisted rehabilitation device realizes the leg strength training of patients on the bed through arranging pedals, tension devices and the like, because the tension device can adjust the tension through the outer nut of, the burden of nursing staff is reduced; chinese patent 201721456393.2 discloses a rehabilitation device for upper limb flexion and extension recovery, which comprises a U-shaped frame, wherein a first chute and a second chute are respectively arranged on the inner bottom wall and the inner walls at two sides of the U-shaped frame, two tension devices are arranged in the first chute, the two tension devices are arranged in the two second chutes, a plurality of fixing holes are arranged on the outer wall of the U-shaped frame, fixing rods are inserted in the fixing holes, a servo motor is arranged on the upper side wall of the U-shaped frame, a driving shaft of the servo motor is connected with a rotating rod, a fixing plate is arranged on the inner bottom wall of the U-shaped frame, the rotating rod penetrates through the fixing plate and extends into the U-shaped frame, the position of each tension device on the U-shaped frame is adjusted, the rehabilitation device is suitable for the lengths and the widths between different upper limbs, the applicability is stronger, and the rehabilitation device can perform omnibearing moving rehabilitation exercise; chinese patent 201710698566.X discloses a strength-adjustable upper limb medical rehabilitation mechanism, which comprises a seat, wherein the rear part of the seat is provided with a backrest, handrails are fixed on two sides of a seat plate of the seat, a main connecting block is fixed on the front part of each handrail, a rotating shaft is hinged on the main connecting block, an upper swinging rod is hinged on the other end of the rotating shaft, fixing plates are fixed on the front part and the rear part of the outer side wall of each handrail, two ends of a transverse adjusting screw rod are hinged on the two fixing plates, a transverse adjusting motor is fixed on the rear wall surface of one of the fixing plates, a self-lubricating tension adjusting block is screwed in the transverse adjusting screw rod, the side wall of the self-lubricating tension adjusting block is tightly attached to the outer side wall of each handrail, one end of an elastic belt is fixed on the self-lubricating tension adjusting block, the other end of the elastic belt, the strength of the elastic band can be adjusted, so that different strength rehabilitation requirements can be met; the tension structure of the above patent products and the rehabilitation apparatus or the fitness apparatus in the prior art is mostly complex in structure and inconvenient to install, can only be used in a single tension state, or the selectivity of different tension states is less, the application range is small, the safety in the use process is poor, a guardian needs to be additionally arranged, therefore, the adjustable tension device for the rehabilitation apparatus or the fitness apparatus is sought to be designed and provided, the use requirements of rehabilitation personnel with different degrees and different rehabilitation stages of the same personnel can be realized through the selection of a plurality of different tension states, the application range is wide, the structure is simple, the installation and the use are convenient, the tension adjusting device has the advantages that tension adjustment cannot be carried out in the using process, damage to a user due to large tension fluctuation is effectively avoided, the safety coefficient is high, a guardian does not need to be additionally arranged, and the use value and the popularization prospect are good.

The invention content is as follows:

the utility model aims to overcome not enough and the defect that prior art exists, seek to design and provide a pulling force device with adjustable be used for recovered apparatus or fitness equipment, can realize the recovered personnel of different degrees and the user demand in the recovered stage of same personnel's difference through the selection of a plurality of different pulling force states, application scope is wide, moreover, the steam generator is simple in structure, it is all more convenient to install and use, can not carry out the pulling force in the use and adjust, effectively avoid the undulant great injury of bringing for the user of pulling force, factor of safety is high and need not additionally to arrange guardianship personnel.

In order to achieve the above object, the main structure of the present invention comprises: the spring fixing device comprises a spring frame, a guide rod, an upper fixing seat plate, a limiting balancing weight, a balancing weight groove, a positioning hole, a lower fixing seat plate, a selective switch fixing plate, an upper clamping plate, a selective switch jack, a spring assembly, a fixing bolt, a bolt clamping groove and a bolt hole; the spring frame consists of two parallel circular sleeves, an upper supporting plate and a lower supporting plate, wherein the front side and the rear side of the top end of each circular sleeve are respectively and fixedly provided with a square upper supporting plate, the upper supporting plates are connected with the circular sleeves to form a hollow annular structure, five groups of bolt clamping grooves which are sunken downwards are symmetrically and uniformly arranged on the two upper supporting plates, the bottom ends of the circular sleeves are provided with square lower supporting plates, the two ends of the lower supporting plates are respectively and fixedly connected with the inner sides of the bottom ends of the two circular sleeves, the lower supporting plates are uniformly provided with five bolt holes penetrating through the lower supporting plates, and the bolt clamping grooves on the upper supporting plates correspond to the bolt holes on; two guide rods with the diameter size corresponding to that of the circular sleeve are respectively arranged in the two circular sleeves of the spring frame, the guide rods penetrate through the circular sleeves and extend out of the circular sleeves, and the spring frame can do up-and-down reciprocating motion along the guide rods through the circular sleeves; the upper side and the lower side of the spring frame are provided with a square upper fixed seat plate and a square lower fixed seat plate which have the same size in parallel, the two ends of the bottom surface of the upper fixed seat plate are respectively and fixedly connected with the top ends of the two guide rods in a detachable mode, and the two ends of the top surface of the lower fixed seat plate are respectively and fixedly connected with the bottom ends of the two guide rods in a detachable mode; three groups of counterweight grooves which penetrate through the upper fixing seat plate and have the same size are equidistantly arranged on the upper fixing seat plate, three groups of limiting counterweights corresponding to the counterweight grooves are arranged on the top surface of the upper fixing seat plate, each limiting counterweight is composed of a square counterweight and a limiting baffle, the limiting baffle is vertically and fixedly connected with the square counterweight, and the limiting baffle of the limiting counterweight can be inserted into the upper fixing seat plate along the counterweight grooves; two groups of positioning holes which are parallel to the counterweight block grooves and penetrate through the upper fixed seat plate are respectively arranged on two sides of the counterweight block grooves of the upper fixed seat plate; two upper clamping plates which are respectively corresponding to the positions of the positioning holes at the two sides of the counterweight block groove are arranged on the bottom surface of the upper fixing seat plate in parallel, the two upper clamping plates are vertically and fixedly connected with the bottom surface of the upper fixing seat plate, and bolt holes penetrating through the upper clamping plates are symmetrically arranged at the two ends of the two upper clamping plates; one side of the upper clamping plate on the bottom surface of the upper fixing seat plate is provided with a selection switch fixing plate parallel to the upper clamping plate, three groups of selection switch jacks penetrating through the selection switch fixing plate are equidistantly arranged on the selection switch fixing plate, three groups of selection switches are arranged in the selection switch jacks, the selection switches penetrate through the selection switch fixing plate and extend out of the spring frame, and the selection switches can do reciprocating plugging motion along the selection switch jacks; five groups of spring assemblies are uniformly arranged in the spring frame, each group of spring assembly consists of a telescopic spring, an upper connecting block, a lower connecting block, a connecting block groove and a spring connecting plate, the top end of the telescopic spring is fixedly connected with the upper connecting block, the upper connecting block is provided with the connecting block groove with an upward opening, the upper connecting block is also provided with a bolt hole penetrating through the upper connecting block, the connecting block groove of the upper connecting block is also internally provided with a square spring connecting plate, the thickness and the size of the spring connecting plate correspond to the size of the connecting block groove on the upper connecting block, the bottom end of the telescopic spring is fixedly connected with the lower connecting block, the lower connecting block is provided with the connecting block groove with a downward opening, the lower connecting block is also provided with a bolt hole penetrating through the lower connecting block, the spring connecting plate is provided with an upper group of, the position of last bolt hole position on two sets of spring unit's of both sides the spring coupling plate is corresponding with the position of the bolt hole on the punch holder, realize spring coupling plate cooperation fixing bolt and punch holder reassembling type fixed connection, last bolt hole position on three spring unit's in the middle spring coupling plate is corresponding with the position of selection switch jack, realize that spring coupling plate cooperation selection switch and selection switch fixed plate take out the formula of inserting fixed connection, the spring coupling plate position of three spring unit's in the middle is corresponding with the position of three spacing balancing weights of group, three spring unit's of group spring unit's spring coupling plate all can insert between two punch holders, will insert the spacing balancing weight jack-up of balancing weight inslot.

The utility model relates to a connecting block recess size on thickness size of under bracing plate and the lower connecting block is corresponding.

The utility model relates to a square counter weight piece size of spacing balancing weight is greater than counter weight groove size of a dimension, can drive limit baffle through the action of gravity and insert the counter weight groove, and limit baffle of spacing balancing weight inserts counter weight groove and downwardly extending to with the selector switch jack corresponding position on the selector switch fixed plate, and limit baffle can shelter from the selector switch jack on the selector switch fixed plate after spring assembly shifts, blocks that the selector switch inserts the selector switch jack when spring assembly is tensile.

The utility model relates to a length dimension of punch holder is corresponding with five group spring unit's width dimension.

The utility model relates to a selector switch fixed plate length dimension is corresponding with three group spring unit's width dimension.

The utility model relates to a quick location installation of punch holder can be realized to the locating hole.

The utility model relates to an adjustable tension device for rehabilitation equipment or fitness equipment, which is firstly assembled, and a circular sleeve of a spring frame is sleeved in a guide rod; the upper fixing seat plate and the lower fixing seat plate are respectively connected with the top end and the bottom end of the guide rod; inserting the limiting balancing weight block into the balancing weight block groove; after the upper connecting blocks of the five groups of spring assemblies are connected with the spring connecting plates respectively by using fixing bolts, the spring assemblies are placed into an annular structure formed after the upper supporting plate is connected with the circular sleeve, and the five groups of fixing bolts can be correspondingly clamped into five groups of bolt clamping grooves on the upper supporting plate respectively; connecting block grooves on lower connecting blocks at the bottom ends of the five groups of spring assemblies are sequentially inserted into the lower supporting plate and are connected by fixing bolts; fixedly connecting spring connecting plates at the top ends of the spring assemblies on the two sides with the upper clamping plate through fixing bolts; the spring connecting plates at the top ends of the middle three groups of spring assemblies are inserted into the selective switch jacks through the selective switches and are fixedly connected with the selective switch fixing plates in a pulling and inserting manner; the three groups of selector switches can be pulled out and inserted in an initial state, only two groups of spring assemblies on the outermost side work when the three groups of selector switches are pulled out, when the tension needs to be increased, 1-3 groups of selector switches are inserted into the selector switch fixing plate along the selector switch jacks according to requirements, and meanwhile, the selector switches penetrate through upper bolt holes of the spring connecting plate, so that the number of the working spring assemblies can be increased; when tension device was in tensile state, not having by selector switch male spring unit to be in the contraction state and along with the spring frame downstream together, spacing balancing weight can fall into the balancing weight inslot because of self action of gravity this moment, selector switch can't insert this moment, and spring unit who is in tensile state simultaneously is because pulling force effect, and selector switch also can't extract, plays effectual safety protection effect to the use.

Compared with the prior art, the utility model, its major structure is simple, and the design concept is ingenious, can realize the different degree of recovered personnel and the user demand in the recovered stage of same personnel's difference through the selection of a plurality of different pulling force states, can not carry out the pulling force in the use and adjust, effectively avoid the undulant great injury of bringing for the user of pulling force, the installation is nimble fast, convenience safe in utilization, the cost of manufacture is low, the appearance is pleasing to the eye, the application effect is friendly, market prospect is wide.

Description of the drawings:

fig. 1 is a schematic diagram of the main structure principle of the present invention.

Fig. 2 is a schematic diagram of the main structure principle of the spring assembly of the present invention.

Fig. 3 is a schematic diagram of the main structure principle of the limiting counterweight block of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following examples and accompanying drawings.

Example 1:

as shown in the figure, the main structure of the present embodiment includes: the spring support comprises a spring frame 1, a guide rod 2, an upper fixing seat plate 3, a limiting balancing weight 4, a balancing weight groove 5, a positioning hole 6, a lower fixing seat plate 7, a selector switch fixing plate 8, an upper clamping plate 9, a selector switch 10, a selector switch jack 11, a spring assembly 12, a fixing bolt 13, a bolt clamping groove 14 and a bolt hole 15; the spring frame 1 comprises two parallel circular sleeves 101, an upper support plate 102 and a lower support plate 103, wherein the front side and the rear side of the top end of each circular sleeve 101 are respectively and fixedly provided with a square upper support plate 102, the upper support plates 102 are connected with the circular sleeves 101 to form a hollow annular structure, five groups of bolt clamping grooves 14 which are sunken downwards are symmetrically and uniformly arranged on the two upper support plates 102, the bottom end of each circular sleeve 101 is provided with a square lower support plate 103, the two ends of each lower support plate 103 are respectively and fixedly connected with the inner sides of the bottom ends of the two circular sleeves 101, the lower support plate 103 is uniformly provided with five bolt holes 15 penetrating through the lower support plate 103, and the bolt clamping grooves 14 on the upper support plates 102 correspond to the bolt holes 15 on the; two guide rods 2 with the diameter size corresponding to that of the circular sleeve 101 are respectively arranged in the two circular sleeves 101 of the spring frame 1, the guide rods 2 penetrate through the circular sleeves 101 and extend out of the circular sleeves 101, and the spring frame 1 can reciprocate up and down along the guide rods 2 through the circular sleeves 101; the upper side and the lower side of the spring frame 1 are provided with a square upper fixed seat plate 3 and a square lower fixed seat plate 7 which have the same size in parallel, two ends of the bottom surface of the upper fixed seat plate 3 are respectively and fixedly connected with the top ends of the two guide rods 2 in a detachable mode, and two ends of the top surface of the lower fixed seat plate 7 are respectively and fixedly connected with the bottom ends of the two guide rods 2 in a detachable mode; three groups of counterweight grooves 5 which penetrate through the upper fixed seat plate 3 and have the same size are arranged on the upper fixed seat plate 3 at equal intervals, three groups of limiting counterweight blocks 4 corresponding to the counterweight grooves 5 are arranged on the top surface of the upper fixed seat plate 3, each limiting counterweight block is composed of a square counterweight block 401 and a limiting baffle 402, the limiting baffle 402 is vertically and fixedly connected with the square counterweight block 401, and the limiting baffle 402 of each limiting counterweight block 4 can be inserted into the upper fixed seat plate 3 along the counterweight groove 5; two groups of positioning holes 6 which are parallel to the counterweight block groove 5 and penetrate through the upper fixed seat plate 3 are respectively arranged on two sides of the counterweight block groove 5 of the upper fixed seat plate 3; two upper clamping plates 9 which respectively correspond to the positions of the positioning holes 6 on the two sides of the counterweight block groove 5 are arranged on the bottom surface of the upper fixing seat plate 3 in parallel, the two upper clamping plates 9 are both vertically and fixedly connected with the bottom surface of the upper fixing seat plate 3, and bolt holes 15 which penetrate through the upper clamping plates 9 are symmetrically arranged at the two ends of the two upper clamping plates 9; a selection switch fixing plate 8 parallel to the upper clamping plate 9 is arranged on one side of the upper clamping plate 9 on the bottom surface of the upper fixing seat plate 3, three groups of selection switch insertion holes 11 penetrating through the selection switch fixing plate 8 are equidistantly formed in the selection switch fixing plate 8, three groups of selection switches 10 are arranged in the selection switch insertion holes 11, the selection switches 10 penetrate through the selection switch fixing plate 8 and extend out of the spring frame 1, and the selection switches 10 can do reciprocating drawing and inserting movement along the selection switch insertion holes 11; five groups of spring assemblies 12 are uniformly arranged in the spring frame 1, each group of spring assemblies 12 is composed of an extension spring 1201, an upper connecting block 1202, a lower connecting block 1203, a connecting block groove 1204 and a spring connecting plate 1205, the top end of the extension spring 1201 is fixedly connected with the upper connecting block 1202, the upper connecting block 1202 is provided with the connecting block groove 1204 with an upward opening, the upper connecting block 1202 is further provided with a bolt hole 15 penetrating through the upper connecting block 1202, a square spring connecting plate 1205 is further arranged in the connecting block groove 1204 of the upper connecting block 1202, the thickness of the spring connecting plate 1205 is corresponding to the size of the connecting block groove 1204 on the upper connecting block 1202, the bottom end of the extension spring 1201 is fixedly connected with the lower connecting block 1203, the lower connecting block 1203 is provided with the connecting block groove 1204 with a downward opening, the lower connecting block 1203 is further provided with the bolt hole 15 penetrating through the lower connecting block 1203, the upper bolt hole and the lower bolt hole 15 are Bolt 13 and last connecting block 1202 reassembling type fixed connection, the last bolt hole 15 position on the spring coupling plate 1205 of two sets of spring unit 12 of both sides is corresponding with the position of the bolt hole 15 on the punch holder 9, realize that spring coupling plate 1205 cooperation fixing bolt 13 and punch holder 9 reassembling type fixed connection, last bolt hole 15 position on the spring coupling plate 1205 of three middle groups of spring unit 12 is corresponding with the position of selector switch jack 11, realize that spring coupling plate 1205 cooperation selector switch 10 and selector switch fixed plate 8 take out the formula fixed connection, the spring coupling plate 1205 position of three middle groups of spring unit 12 is corresponding with the position of three groups of spacing balancing weights 4, the spring coupling plate 1205 of three groups of spring unit 12 homoenergetic enough inserts between two punch holders 9, will insert the spacing balancing weight 4 jack-up of balancing weight inslot 5.

The utility model relates to a thickness dimension of bottom suspension strut 103 is corresponding with connecting block recess 1204 recess size on the lower connecting block 1203.

The utility model relates to a balancing weight 401 size of spacing balancing weight 4 is greater than 5 size of balancing weight groove, can drive limit baffle 402 through the action of gravity and insert balancing weight groove 5, limit baffle 402 of spacing balancing weight 4 inserts balancing weight groove 5 and downwardly extending to the position corresponding with the selector switch jack 11 of selector switch fixed plate 8, limit baffle 402 can shelter from the selector switch jack 11 on the selector switch fixed plate 8 after spring assembly 12 shifts, stop that selector switch 10 inserts selector switch jack 11 when spring assembly 12 is tensile.

The length dimension of the upper clamping plate 9 of the utility model corresponds to the width dimension of the five groups of spring assemblies 12.

The utility model relates to a selector switch fixed plate 8 length dimension and three group spring assembly 12's width dimension are corresponding.

The utility model relates to a quick location installation that locating hole 6 can realize punch holder 9.

The utility model relates to an adjustable tension device for rehabilitation equipment or fitness equipment, which is assembled firstly, and a circular sleeve 101 of a spring frame 1 is sleeved into a guide rod 2; the upper fixing seat plate 3 and the lower fixing seat plate 7 are respectively connected with the top end and the bottom end of the guide rod 2; inserting the limiting balancing weight 4 into the balancing weight groove 5; after the upper connecting blocks 1202 of the five groups of spring assemblies 12 are respectively connected with the spring connecting plates 1205 by the fixing bolts 13, the spring assemblies 12 are placed into an annular structure formed after the upper supporting plate 102 is connected with the circular sleeve 101, and the five groups of fixing bolts 13 can be correspondingly clamped into the five groups of bolt clamping grooves 14 on the upper supporting plate 102 respectively; connecting block grooves 1204 on lower connecting blocks 1203 at the bottom ends of the five groups of spring assemblies 12 are respectively inserted into the lower supporting plate 103 in sequence and connected by fixing bolts 13; the spring connecting plates 1205 at the top ends of the spring assemblies 12 at the two sides are fixedly connected with the upper clamping plate 9 through the fixing bolts 13; the spring connecting plates 1205 at the top ends of the middle three groups of spring assemblies 12 are inserted into the selection switch jacks 11 through the selection switches 10 and are fixedly connected with the selection switch fixing plates 8 in a pulling-inserting mode; in an initial state, the three groups of selector switches 10 can be pulled out and inserted, only two groups of spring assemblies 12 on the outermost side work when the three groups of selector switches 10 are pulled out, when the pulling force needs to be increased, 1-3 groups of selector switches 10 are inserted into the selector switch fixing plate 8 along the selector switch insertion holes 11 according to the requirement, and meanwhile, the selector switches 10 penetrate through the upper bolt holes 15 of the spring connecting plate 1205, so that the number of the spring assemblies 12 which work can be increased; when tension device is in tensile state, spring assembly 12 that does not have by selector switch 10 male is in the contraction state and along with spring frame 1 downstream together, and spacing balancing weight 4 can fall into in balancing weight groove 5 because of self action of gravity this moment, and selector switch 10 can not insert this moment, and spring assembly 12 that is in tensile state simultaneously is because the pulling force effect, and selector switch 10 also can't be extracted, plays effectual safety protection effect to the use.

Claims

1. An adjustable tension device for rehabilitation or fitness equipment, which is characterized in that: the main structure includes: the spring fixing device comprises a spring frame, a guide rod, an upper fixing seat plate, a limiting balancing weight, a balancing weight groove, a positioning hole, a lower fixing seat plate, a selective switch fixing plate, an upper clamping plate, a selective switch jack, a spring assembly, a fixing bolt, a bolt clamping groove and a bolt hole; the spring frame consists of two parallel circular sleeves, an upper supporting plate and a lower supporting plate, wherein the front side and the rear side of the top end of each circular sleeve are respectively and fixedly provided with a square upper supporting plate, the upper supporting plates are connected with the circular sleeves to form a hollow annular structure, five groups of bolt clamping grooves which are sunken downwards are symmetrically and uniformly arranged on the two upper supporting plates, the bottom ends of the circular sleeves are provided with square lower supporting plates, the two ends of the lower supporting plates are respectively and fixedly connected with the inner sides of the bottom ends of the two circular sleeves, the lower supporting plates are uniformly provided with five bolt holes penetrating through the lower supporting plates, and the bolt clamping grooves on the upper supporting plates correspond to the bolt holes on; two guide rods with the diameter size corresponding to that of the circular sleeve are respectively arranged in the two circular sleeves of the spring frame, the guide rods penetrate through the circular sleeves and extend out of the circular sleeves, and the spring frame can do up-and-down reciprocating motion along the guide rods through the circular sleeves; the upper side and the lower side of the spring frame are provided with a square upper fixed seat plate and a square lower fixed seat plate which have the same size in parallel, the two ends of the bottom surface of the upper fixed seat plate are respectively and fixedly connected with the top ends of the two guide rods in a detachable mode, and the two ends of the top surface of the lower fixed seat plate are respectively and fixedly connected with the bottom ends of the two guide rods in a detachable mode; three groups of counterweight grooves which penetrate through the upper fixing seat plate and have the same size are equidistantly arranged on the upper fixing seat plate, three groups of limiting counterweights corresponding to the counterweight grooves are arranged on the top surface of the upper fixing seat plate, each limiting counterweight is composed of a square counterweight and a limiting baffle, the limiting baffle is vertically and fixedly connected with the square counterweight, and the limiting baffle of the limiting counterweight can be inserted into the upper fixing seat plate along the counterweight grooves; two groups of positioning holes which are parallel to the counterweight block grooves and penetrate through the upper fixed seat plate are respectively arranged on two sides of the counterweight block grooves of the upper fixed seat plate; two upper clamping plates which are respectively corresponding to the positions of the positioning holes at the two sides of the counterweight block groove are arranged on the bottom surface of the upper fixing seat plate in parallel, the two upper clamping plates are vertically and fixedly connected with the bottom surface of the upper fixing seat plate, and bolt holes penetrating through the upper clamping plates are symmetrically arranged at the two ends of the two upper clamping plates; one side of the upper clamping plate on the bottom surface of the upper fixing seat plate is provided with a selection switch fixing plate parallel to the upper clamping plate, three groups of selection switch jacks penetrating through the selection switch fixing plate are equidistantly arranged on the selection switch fixing plate, three groups of selection switches are arranged in the selection switch jacks, the selection switches penetrate through the selection switch fixing plate and extend out of the spring frame, and the selection switches can do reciprocating plugging motion along the selection switch jacks; five groups of spring assemblies are uniformly arranged in the spring frame, each group of spring assembly consists of a telescopic spring, an upper connecting block, a lower connecting block, a connecting block groove and a spring connecting plate, the top end of the telescopic spring is fixedly connected with the upper connecting block, the upper connecting block is provided with the connecting block groove with an upward opening, the upper connecting block is also provided with a bolt hole penetrating through the upper connecting block, the connecting block groove of the upper connecting block is also internally provided with a square spring connecting plate, the thickness and the size of the spring connecting plate correspond to the size of the connecting block groove on the upper connecting block, the bottom end of the telescopic spring is fixedly connected with the lower connecting block, the lower connecting block is provided with the connecting block groove with a downward opening, the lower connecting block is also provided with a bolt hole penetrating through the lower connecting block, the spring connecting plate is provided with an upper group of, the position of last bolt hole position on two sets of spring unit's of both sides the spring coupling plate is corresponding with the position of the bolt hole on the punch holder, realize spring coupling plate cooperation fixing bolt and punch holder reassembling type fixed connection, last bolt hole position on three spring unit's in the middle spring coupling plate is corresponding with the position of selection switch jack, realize that spring coupling plate cooperation selection switch and selection switch fixed plate take out the formula of inserting fixed connection, the spring coupling plate position of three spring unit's in the middle is corresponding with the position of three spacing balancing weights of group, three spring unit's of group spring unit's spring coupling plate all can insert between two punch holders, will insert the spacing balancing weight jack-up of balancing weight inslot.

2. The adjustable tension device for rehabilitation or fitness apparatus of claim 1, wherein: the thickness of the related lower support plate corresponds to the size of a groove of a connecting block on the lower connecting block; the size of the square counterweight block size of the related limiting counterweight block is larger than that of the counterweight block groove, the limiting baffle can be driven to be inserted into the counterweight block groove through the action of gravity, the limiting baffle of the limiting counterweight block is inserted into the counterweight block groove and extends downwards to a position corresponding to the selection switch jack on the selection switch fixing plate, the limiting baffle can shield the selection switch jack on the selection switch fixing plate after the spring assembly is displaced, and the selection switch is prevented from being inserted into the selection switch jack when the spring assembly is stretched; the length dimension of the related upper clamping plate corresponds to the width dimension of the five groups of spring assemblies; the length dimension of the related selector switch fixing plate corresponds to the width dimension of the three groups of spring assemblies; the locating hole that relates to can realize the quick location installation of punch holder.