CN2620556Y

CN2620556Y - Resistance regulating structure of simple chest-developer

Info

Publication number: CN2620556Y
Application number: CN 03244985
Authority: CN
Inventors: 余惠南
Original assignee: 蔡饶兴
Priority date: 2003-04-14
Filing date: 2003-04-14
Publication date: 2004-06-16
Anticipated expiration: 2013-04-14

Abstract

A resistance adjustment structure for simple tension device mainly comprises an outer shell body, an adjustment apparatus, a wire wheel and a gear axle. The outer shell body is comprised of a first shell body and a second shell body, wherein, the adjustment apparatus is arranged at one end of the first shell body close to the wire wheel and comprises a knob, a positioning piece and a unidirectional bearing; the positioning piece clips with the first shell body and the external side enables the knob to penetrate with a bolt; the bolt is capable to screw with the unidirectional bearing and setup the position relating the adjustment apparatus; an arc board is provided opposite to the unidirectional bearing inside the shell body and enables the drawing rope to move along the arc surface evenly. Internal circle teeth are provided inside the second shell body of the outer shell body for the arrangement of the gear axle, circled teeth are provided on the axle of the gear axle, the hollowed axle tube at the rear part is capable to place an elastic component, the teeth of the gear axle fit with the internal circle teeth of the second covers through the action of the elastic component.

Description

The resistance of simple and easy chest expander is adjusted structure

Technical field

The utility model relates to a kind of resistance of simple and easy chest expander and adjusts structure, particularly can reach the frictional resistance effect that multistage is implemented variation by easy control structure.

Background technology

Mostly general chest expander is to use the volute torsionspring, and the reset assembly when being furled as drag-line, and when drag-line is drawn out, utilizes and form frictional resistance between a friction member and the drag-line makes the load resistance that has motion when doing extensional motion.But existing chest expander structure does not have the frictional force of adjustment drag-line and the effects such as tightness of torsionspring, therefore may not necessarily satisfy operator's demand of different motion amount on reality is used.

Summary of the invention

Main purpose of the present utility model provides a kind of resistance of simple and easy chest expander and adjusts structure, adopt the axle of elasticity activity by gear shaft and establish mode, can in to gear shaft, press the back to rotate, use the volume degree of adjusting torsionspring, and then the active force of controlled stay cord answer, and make gear shaft return to normal down to such an extent that make tooth portion and inner circular tooth engagement location, so gear shaft is simple and easy and again can not transposition in adjustment.

Of the present utility model time a purpose provides a kind of frictional force structure that stay cord stretches of adjusting, and makes the operator adjust the difficulty that stay cord stretches according to actual behaviour in service, and more meets the demand of hommization.

The utility model is elaborated with instantiation below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the utility model stereoscopic figure;

Fig. 2 is the utility model exploded perspective view;

Fig. 3 is the utility model internal structure floor map;

Fig. 4 is another embodiment floor map of the utility model internal structure;

Fig. 5 be the utility model according to 5-5 cutting line shown in Figure 1 and arrow direction look cutaway view;

Fig. 6 is that the utility model rotates the adjustment view according to structure shown in Figure 5 and to gear shaft.

Description of reference numerals: shell body 1,1 '; First housing 11,11 '; Grip part 111,111 '; Axle bed 112; Unilateral bearing 112 '; Arc plate 113; Perforate 114; Second housing 12; Grip part 121; Axle bed 1 22; Inner circular tooth 123; Perforate 124; External member 13; Adjusting device 2; Knob 21; Double-screw bolt 211; Keeper 22; Unilateral bearing 23; Line concentration wheel 3; Side recess 31; Axis hole 311; Stay cord 32; Draw 33; Gear shaft 4; Tooth portion 41; Positioning groove 42; Polygonal hole 43; Central siphon 44; Elastic parts 441; Torsionspring 45; Folding end 451; Hand-held tool 5.

The specific embodiment

See also Fig. 1 to Fig. 3, chest expander of the present utility model includes shell body 1, adjusting device 2, line concentration wheel 3 and gear shaft 4, wherein shell body 1 includes first housing 11 and second housing 12 of double housing of two relative shape, be provided with grip part 111 in first housing 11 and second housing, 12 1 sides, 121, the gripping that can be convenient to hand is used, two housings is provided with axle bed 112 near middle position, 122, the position is provided with perforate 114 on the side in addition at first housing 11 and second housing 12,124, can set firmly for an external member 13 herein, stay cord 32 for line concentration wheel 3 runs through, be wound with stay cord 32 on the wheel rim of this line concentration wheel 3, these stay cord 32 1 ends and line concentration wheel 3 are fixing, end is connected in and draws 33 in addition, and this stay cord 32 can be in external member 13 in-draws, furl.

See also Fig. 3 and Fig. 5, above-mentioned line concentration is taken turns 3 one side indents and is formed a side recess 31, can supply built-in torsionspring 45, and line concentration wheel 3 can be run through and is located in the shell body 1 by gear shaft 4, and the folding end 451 of torsionspring 45 outer ends is affixed with side recess 31 inner edges of line concentration wheel 3,451 inner of folding ends are fixed on the positioning groove 42 of gear shaft 4, utilize pulling to force in 32 of stay cords torsionspring 45 distortion are reversed; Drawing 33 time on not forcing in stay cord 32, torsionspring 45 automatically replies original state, and line concentration wheel 3 stay cord 32 of reeling is again resetted.

See also Fig. 3, said first shell 11 is provided with adjusting device 2 near rear, external member 13 position, this adjusting device 2 includes knob 21, keeper 22 and unilateral bearing 23, wherein keeper 22 can be folded on first housing 11 fixing, keeper 22 outsides can be run through with its double-screw bolt 211 for knob 21, its double-screw bolt 211 and the unilateral bearing 23 that can be spirally connected utilize the rotation of knob 21 can adjust that unilateral bearing 23 inwardly protrudes out or the distance of external contracting; And with respect to adjusting device 2 placements, and unilateral bearing 23 opposites of being located at shell body 1 inside are for being provided with an arc plate 113, this arc plate 113 for the stay cord 32 of line concentrations wheel 3 along its cambered surface and smooth-going being pulled.

See also Fig. 5 again, second housing, 12 axle beds, 122 inboards of shell body 1 are provided with inner circular tooth 123, it can be provided with for gear shaft 4, these gear shaft 4 outer ends have a polygonal hole 43, wheel shaft is provided with the tooth portion 41 of lopping, the central siphon 44 of an inner hollow is extended at the rear, and can a built-in elastic parts 441 in the central siphon 44; Gear shaft 4 because of the active force of elastic parts 441, makes the tooth portion 41 of gear shaft 4 be meshing with each other for the inner circular tooth 123 with second housing 12 under normality.

Adopt the axle of elasticity activity by gear shaft 4 and establish mode, can in to gear shaft 4, press the back to rotate, use the volume degree of adjusting torsionspring 45, and then the active force of controlled stay cord 32 answers, and make gear shaft 4 return to normal down to such an extent that make tooth portion 41 and inner circular tooth 123 engagement location, so gear shaft 4 is simple and easy and again can not transposition on adjusting.

In first housing 11 ' of the utility model shell body 1 ' for stay cord 32 smooth-going stretchings, the arc plate 113 that furls, further can such as the unilateral bearing 112 ' of Fig. 6 replacement.This first housing 11 ' is provided with adjusting device 2 near an end place of stay cord 32 pullings of line concentration wheel 3, this adjusting device 2 includes knob 21, keeper 22 and unilateral bearing 23, wherein keeper 22 is folded on first housing 11 ', the outside can be run through with its double-screw bolt 211 for knob 21, its double-screw bolt 211 and the unilateral bearing 23 that can be spirally connected, and the position is set with respect to adjusting device 2, and be located at shell body 1 ' inner unilateral bearing 23 opposites and be provided with a unilateral bearing 112 ', it can make two unilateral bearings do the stretching action of unidirectional restriction simultaneously to stay cord 32 for stay cord 32 along its surface.

Claims

1, a kind of resistance of simple and easy chest expander is adjusted structure, mainly comprise two pairs of double housings of shell body, shell body one side is provided with the grip part, two housings inside is provided with the line concentration wheel, the position is wound with stay cord on the wheel rim of line concentration wheel, this stay cord one end and line concentration wheel are fixing, handle is drawn in end connection one in addition, this draws being located at the shell body outside place of side in addition, this line concentration is taken turns a side indent and is formed a side recess, and for built-in torsionspring, and the line concentration wheel is run through by gear shaft and is located in the shell body, and torsionspring outer end and line concentration wheel are affixed, the inner is fixed on the gear shaft, utilizes pulling to force in stay cord the torsionspring distortion is reversed, when not forcing in stay cord, torsionspring makes and automatically replies original state, makes line concentration take turns the stay cord of reeling again simultaneously and resets; It is characterized in that:

Shell body includes first housing and second housing, this first housing is provided with adjusting device near an end place of the stay cord pulling of line concentration wheel, this adjusting device includes knob, keeper and unilateral bearing, wherein keeper is folded on first housing, the outside is run through with its double-screw bolt for knob, its double-screw bolt unilateral bearing that is spirally connected, and the position is set with respect to adjusting device, and the unilateral bearing opposite of being located at shell body inside is provided with an arc plate, for stay cord along its cambered surface and smooth-going being pulled;

The second housing axle bed inboard of shell body is provided with inner circular tooth, for the gear shaft setting, this gear shaft outer end has a polygonal hole, wheel shaft is provided with the tooth portion of lopping, the central siphon of an inner hollow is extended at the rear, a built-in elastic parts in the central siphon, gear shaft because of the active force of elastic parts, is meshing with each other the tooth portion of gear shaft and the inner circular tooth of second housing under normality.

2, the resistance of simple and easy chest expander as claimed in claim 1 is adjusted structure, and wherein, the inner opposite face of the unilateral bearing setting of adjusting device that supplies of shell body can be for a unilateral bearing is set.