CN107648829A - The barbell pad of injection-molded eva foam - Google Patents

Abstract

The invention discloses one kind to be padded, and it is arranged on the whippletree of barbell, and the power that whippletree applies is dispersed in the larger area of the shoulder of the people that whippletree rests on, neck, and/or chest.Pad include elasticity, highly compressible injection-molded eva foam, slender body with annular cross section, hold the whippletree and keep padding inner surface in place on whippletree, and the outer surface of double curved arc lines of the profile with shoulder, neck and/or the chest for meeting the people using barbell.

Description

The barbell pad of injection-molded eva foam

Technical field

The present invention relates generally to motion and body-building equipment, and relate more specifically to the pad being arranged on barbell whippletree, And the power applied by whippletree is dispersed in the larger of the shoulder of the people that whippletree rests on, neck and/or chest by the pad On region.

Background technology

Barbell is padded for performing a variety of motions, such as is gone down on one's knees or squatted down, wherein, user is carrying out shoulder pressure training While the barbell of loading is placed across his/her shoulder and back or across chest and shoulder.This pad generally use The exruded foams material of type is made, and their main purpose is to provide the buffering between whippletree and body, and thus Improve comfortableness or mitigate the discomfort for aggravating the barbell with user.

The whippletree pad of currently available most basic type includes the tubulose foam of a segment length, and it slips over the end of whippletree Or the opening with slit is formed along side, this allows pad from the installation of the side of bar and removed, and is born a heavy burden without removing.It is more multiple Miscellaneous pad has along slitThe fabric cover of fastener.Covering is maintained on pad by fastener, And contribute to make the rotation of pad to minimize to a certain extent.Covering adds material outer layer, and it provides resistance foam The moderate protection of outside damage, as damp-proof layer to protect the foamed material of more cells not absorb excessive sweat, and permits Perhaps the outside of product is easier cleaned.

Tubulose foam whippletree pad in the market is by extruding manufacture, and most has linear shape Shape, it is uniform through the wall thickness of their length and cross section.Only a small number of human body works with the profile corresponding to human body Cheng Xue shapes, also, those with ergonomic shape are generally formed initially as straight tube, then using secondary manufacturing operation Excision otherwise removes material from extruding pipe, preferably to match the profile of body.

Many whippletrees pad in the market is foamed pipe separator, and it by material by being cut into desired length And process slit in side and be transformed into whippletree pad, it is on whippletree and right to allow user during movement to slide into pad Row buffering is entered at its back.

The material used at present in whippletree pad includes NBR (nitrile rubber) foam, polyethylene and with extruding work The compatible other open-cell materials of skill.Open-cell material generally has change or random hole size, inconsistent and/or uncontrollable Pore structure, and thin outer layer or skin, its accessory substance as expressing technique and formed, and provided for the open-celled structure of bottom Limited protection.

Expressing technique has some advantages really, for example, manufacturing cost is low, good control to final internal diameter and external diameter, with And the hardness control of appropriateness, also, extrude the best compromise that whippletree pad is typically considered between function and price.

However, the foamed material and expressing technique that use at present also have many limitations when manufacturing whippletree pad and lacked Point.Foamed material does not have high compression life cycle, and they are not elastic, and they repeat load and unloading after It is easy to compression set.This causes thin skin to deteriorate, and accelerates collapsing for the pore structure of bottom, and this causes bad long-term resistance to The rapid loss of long property and function.This deterioration causes foam whippletree pad to form long flat site in its tubular form, This so accelerate pad failure so that it is useless for buffering or supporting the weight on user's body.Finally, The flat site of lather collapse is finally recovered and split, so as to cause the thorough failure that whippletree pads.Be closed due to foam or Covering, there may be a longer life cycle to a certain extent by the whippletree pad of fabric covering, but the additional layer of material The influence of the compression circulation of repetition, and the final still crash of product will not be reduced.

Another problem of linear expressing technique is, although it is probably effective, it, which is formed, has uniform horizontal stroke The linear tube in section, its mismatch human body contour outline, and mismatch by barbell weight uniformly and cosily be dispersed on body with Obtain the final function of the pad more preferably controlled.Mismatch between the linearity configuration of body and the whippletree pad of user causes Along the generation of the pressure spot of liner length, the pressure spot pinches pad between user and whippletree, so as to distort the shape of pad Shape.When this happens, whippletree cushioning foam is loaded in same area by Repeated Compression or point, so as to the mistake of accelerated material Imitate and reduce its serviceability as buffering barrier.

The content of the invention

Generally, it is an object of the invention to provide a kind of new and improved pad, it is arranged on the whippletree of barbell, and The power that whippletree applies is distributed in the large area of the shoulder of the people that whippletree rests on, neck and/or chest.

It is a further object to provide pad as characterized above, and it overcomes what barbell described above padded Limitation and shortcoming.

According to the present invention, these and other objects are realized by providing a kind of pad on the thick stick of barbell, institute State flexible, the highly compressible injection-molded eva foam of pad, there is the slender body of annular cross section；Clamp Whippletree and the inner surface for making pad be held in place on whippletree；And with meet the shoulder of people using barbell, neck and/or The outer surface of double curved (ogee) camber lines of the profile of chest.

Brief description of the drawings

Fig. 1 is that the barbell of one embodiment with the pad using the present invention is kept being shelved on its shoulder by a people Front view；

Fig. 2 is the axle surveys view of the barbell pad of Fig. 1 embodiment；

Fig. 3 is the viewgraph of cross-section along Fig. 2 line 3-3 interceptions；

Fig. 4 is the viewgraph of cross-section along Fig. 2 line 4-4 interceptions；

Fig. 5 is the side view substantially illustrated of the barbell pad in Fig. 1 embodiment；

Fig. 6 is the axle surveys view gone down on one's knees or squatted down before a people is carried out, wherein, the pad of Fig. 1 embodiment is shelved Against its chest and shoulder；

Fig. 7 is the side view of another embodiment padded according to the barbell of the present invention；

Fig. 8 and Fig. 9 is the viewgraph of cross-section along Fig. 7 line 8-8 and 9-9 interception；

Figure 10 is the side view of another embodiment padded according to the barbell of the present invention；

Figure 11 is the viewgraph of cross-section along Figure 10 line 11-11 interceptions；

Figure 12 is the viewgraph of cross-section along Figure 10 line 12-12 interceptions.

Embodiment

In Fig. 1, barbell pad 16 is shown together with barbell 17, and barbell has an elongated whippletree 18, and balancing disk 19 is detachable Ground is arranged on the opposite end of whippletree.

As Fig. 2-5 is further illustrated, barbell pad 16 has the slender bodies 21 of injection-molded eva foam, and it is arranged on On whippletree, whippletree passes through the axially extending opening 22 in body.Cross section of the pad with annular, has the diameter with whippletree Corresponding internal diameter, and the external diameter for changing the human body contour outline rested against along the length of pad according to whippletree.Shown In embodiment, opening 22 has straight cylindrical side wall 23, but it can have the difference of the shape corresponding to another whippletree Profile.

The outer surface 24 of whippletree gasket body has diameter substantially uniform cylindrical midsection point 26, from center section Opposite end extension, towards body end diameter increase bow part 27,27, from bow part extend , the convex bending part 28,28 that further increases of end diameter towards body, and in the outer end of part 28,28 and this The rounded ends part 29,29 that between the end of body, diameter reduces.Bow part 27,27 and convex bending part 28, 28 are smoothly merged, and form double curved arc lines of the profile of the shoulder for being closely matched human body, chest and/or neck 31、31.The profile of whippletree pad on the longitudinal axis of whippletree gasket body be it is symmetrical, longitudinal axis be shown as with figure X-axis alignment.Pad is also symmetrical on intermediate radial plane that is perpendicularly to the longitudinal axis and being overlapped with the y-axis in figure.

Center section 26 extends between two sagittal plane A, and only one of which can be in the portion of the pad shown in Fig. 5 See in point.The two interplanars separate equal distance with mid-plane, and perpendicular to the longitudinal axis of body.Spill is curved Bent portions 27 extend to sagittal plane B from sagittal plane A, and sagittal plane B also separates equal distance with mid-plane, and convex Shape bent portion 28 extends to sagittal plane C from sagittal plane B, and sagittal plane C equally separates equal distance with mid-plane. End sections 29 extend to the outer end of pad from sagittal plane C.

The length of the extension body of slit 32, it is open, and allows through inner surface 23 and outer surface 24 on the side of body Body on the opposite side of slit is partially separated, and when pad is installed on whippletree or is removed from whippletree, is permitted Perhaps whippletree passes through between them.In this embodiment, slit be located at through body axis axial plane in, and its along Outer surface opening is passed straight through from what one end of body extended to the other end.

Different from the barbell pad of prior art, the foamed bulk of barbell pad 16 is made up of injection molding process, its In, graininess ethylene vinyl acetate (EVA) and one or more foaming agents are heated under middle pressure and carry out a chemistry instead Should, it makes mixture is crosslinked together to turn into stabilizing material.Mould is preheated to 80 DEG C of temperature, and is formed very in mould The empty flowing to promote through cavity.By in EVA and the mould of (a variety of) foaming agent injection preheating, about 170 DEG C are then heated to Temperature, to occur mixture reaction crosslinked together, and produce foam.The size of cavity is less than final products, Which has limited the expansion of foam, and substantial amounts of minute bubbles and micropore are formed in very closed space.When the mold is open, Allow pad expansion, eject and cool down from cavity.With the cooling of pad, it is contracted to final size, has and passes through tradition The closelypacked hole-closing structure and porous volume that exruded foams technique can not obtain.If desired, pad can be with limitation The form cooling of contraction, and ensure more accurate size in final products.

Preferred EVA foam for barbell pad is using ethylene vinyl acetate (EVA), thermoplastic elastomer (TPR) It is made with the mixture of calcium carbonate, 22% EVA, 75% TPR and 3% mixture of calcium carbonate provide particularly preferred knot Fruit.This closed-cell foam material produces a pad, and minimal compression is presented in its entirely available life and is permanently deformed and maintains just True shape and function.This allows being significantly compression during use, and the power of load is distributed to shoulder, neck and/or chest by this In the larger area in portion, so as to ease off the pressure and make degree of comfort maximization.After load removes from pad, foam springs arrive Its original-shape, become the ideal material for barbell pad.

The elastic property of eva foam mixture assigns Cushion Resilience energy, and it causes pad to close and clamp around whippletree, The inner surface 23 of pad engages whippletree with holding.This is combined with the shape or geometry of pad, and pad is kept firmly at into whippletree On, the unnecessary rotation between pad and whippletree is prevented, and avoid and such as covered to what is used in other barbells pad The needs of the closed for second time part of cover piece and fastener.

The lasting of EVA foam, the property of closed pore allow to use whippletree in the case of without protection covering Pad, it means that it can be with skin contact.However, this is not problem, because EVA foam is latex-free and had Smooth surface, it is with providing comfortable interface during skin contact.Due to the persistence of foam, surface is by the whole of pad Keep smooth and easy to clean in life cycle.The mechanical performance of material is stable, and material is not upon exposure to heat It can become sticky.Material is free of anaphylactogen and protection against the tide.

During moving and using pad, for the function related to human body, comfortableness and control, barbell pad Shape is also important.Unique double curved surface profiles are particularly selected, to support during use in motion and equably simultaneously The weight of scattered loading barbell, and eliminate the pressure spot caused by the linear character that barbell described above pads.In addition, Because the camber line of pad corresponds to the natural camber line of body, so the profile of whippletree pad improves control, so as in user, horizontal stroke Thick stick pads forms improved relation between barbell.Double curved arc lines allow whippletree to pad around cucullaris, deltoid muscle, neck, ridge Post, the nucleus in thoracic cavity and clavicle and pressure spot transition, so as to increase comfort level and control.

In Fig. 1, barbell 17 is shown as being shelved on user's neck back side and the top of shoulder, such as in order to carry out Go down on one's knees or squat down exercise and as positioning barbell.As it will be apparent from this figure that the human body work formed by ogee 31,31 Cheng Xue (ergonometric) camber line 33 closely conforms to the camber line of neck and shoulder, and end sections 29,29 carry for shoulder For extra comfortableness.

Fig. 6 shows that a people is gone down on one's knees or squatted down, and barbell 17 rests against his/her upper breast and shoulder. This, ergonomics camber line 33 avoids neck or throat, and rounded ends part 29,29 provides extra comfort for shoulder.

By injection molding technique, surface texture can also be formed on foamed bulk, such as Fig. 2-5 embodiment has The grooves 36 of multiple Longitudinal extendings on the outer surface of body, surround body close end sections 29 base portion line 37, and Multiple concentric grading rings on the outer end of end sections.

Fig. 7-9 and Figure 10-12 shows the further embodiment of barbell pad.These embodiments be substantially similar to Fig. 2- 5 embodiment, and utilize element corresponding to the reference expression in these three embodiments.

In Fig. 7-9 embodiment, pad and be that it has rank with the difference of the pad in Fig. 2-5 embodiment Ladder type slit rather than linear slit, and it has smooth outer surface without groove or other textural characteristics.Ladder Formula slit has center section 41 and end sections 42,42, and its parallel lines laterally offset through the outer surface of body is opened Mouthful, short part 43,43 provides seamlessly transitting between other parts.Center section 41 and end sections 42,42 are located at and horizontal stroke Wear in the axial plane of body axis, and be offset from one another 40 degree of angles.

Figure 10-12 embodiment is similar to Fig. 7-9 embodiment, is spaced apart except slit section 41 and 42,42 is located at And in parallel and parallel with body axis plane.Spacing between two planes is slightly smaller than the diameter of opening 22, and plane It is substantially tangent with the upper side and lower side of opening, as shown in these figures.

The present invention has many key characters and advantage.The power that barbell applies is dispersed in the larger face of the body of people by pad In product, more preferable comfortableness and control are padded than straight tubular described above so as to provide.Double curved arc lines closely conform to body The profile of body, and the persistence of closed-cell foam material and being resiliently formed shows the pad of minimal compression permanent deformation, and Correct form and function are kept during whole service life.Injection molding process produces crosslinked foams, and it, which has, utilizes biography The hole-closing structure for the dense accumulation that system exruded foams technique can not obtain and poroid volume.

It is apparent by the above, it has been proposed that a kind of new and improved barbell pad.Although retouch in detail Current specific preferred embodiment is stated, it will be clear to those skilled in the art that not departing from by appended In the case of the scope of the present invention that claim limits, some changes and modification can be carried out.

Claims (20)

1. one kind pad, it is arranged on the whippletree of barbell, and the power that the whippletree applies is dispersed in and uses the barbell The shoulder of people, neck, and/or chest larger area on, the pad includes:Elasticity, highly compressible injection mold Eva foam processed, have annular cross section slender body, hold the whippletree and keep it is described pad on the whippletree Inner surface in place, and double curved arc lines of the profile with shoulder, neck and/or the chest for meeting the people using the barbell Outer surface.

2. pad according to claim 1, wherein, the eva foam is ethylene vinyl acetate, thermoplastic elastomer and carbon The mixture of sour calcium.

3. pad according to claim 2, wherein, the mixture include 22% ethylene vinyl acetate, 75% Thermoplastic elastomer and 3% calcium carbonate.

4. pad according to claim 1, wherein, the ethene second that the foamed bulk passes through heated particle shape in a mold The mixture of vinyl acetate and foaming agent opens the mould to form substantial amounts of minute bubbles and micropore in limited space, And body ejection, expansion and the cooling is allowed to be manufactured to form the hole-closing structure of dense accumulation.

5. pad according to claim 1, wherein, the slender body has center section, from the center section Opposite end extends and towards the bow part that increases of end diameter of the body, and from the bow part Extend and towards the convex bending part that further increases of end diameter of the body, wherein, the bow part and The convex bending part forms double curved arc lines, double curved arc lines meet the shoulder of the people using the barbell, neck and/or The profile of chest.

6. pad according to claim 5, wherein, the end sections of the body are aduncate and described convex Reduce diameter between shape bent portion and the end of the body.

7. pad according to claim 1, including slit, the slit extends the length of the body, in the body Side on pass through the inner surface and outer surface opening, and be installed in the pad on the whippletree or from the horizontal stroke When being removed on thick stick, it is allowed to separated in the part of the body of the opposite side of the slit and allow the whippletree to pass through them.

8. pad according to claim 7, wherein, the slit is located at the axial plane of the axis through ring body In.

9. pad according to claim 7, wherein, the slit has center section and end sections, the pars intermedia Divide and be located in the first plane, the end sections are located in the second plane, and the second plane separates with the first plane.

10. pad according to claim 9, wherein, first plane and second plane are parallel to each other and parallel In the axis of the ring body.

11. pad according to claim 7, wherein, the pad is clamped by the elasticity of injection-molded foamed bulk To the whippletree, the pad is held in place on the whippletree.

12. one kind pad, it is arranged on the whippletree of barbell, and the power for the whippletree to be applied, which is dispersed in, uses the barbell The shoulder of people, neck and/or chest larger area on, the pad includes elastic, highly compressible injection-molded There is the whippletree to receive axially extending opening wherein and meet people's for the slender body of eva foam, the body The outline of shoulder, neck and/or chest.

13. the pad according to claim 12, wherein, the eva foam is ethylene vinyl acetate, thermoplastic elastomer and carbon The mixture of sour calcium.

14. pad according to claim 13, wherein, the mixture includes 22% ethylene vinyl acetate, 75% Thermoplastic elastomer and 3% calcium carbonate.

15. pad according to claim 12, wherein, the ethene that the foamed bulk passes through heated particle shape in a mold The mixture of vinyl acetate and foaming agent opens the mould to form substantial amounts of minute bubbles and micropore in limited space Tool, and allow body ejection, expansion and the cooling to be manufactured to form the hole-closing structure of dense accumulation.

16. pad according to claim 12, including slit, the slit extend the length of the body, and allow The part of the body on the opposite side of the slit separates and allows the whippletree through in the opening and from institute Opening is stated to leave.

17. pad according to claim 16, wherein, the pad is clamped by the elasticity of injection-molded foamed bulk On the whippletree, the pad is held in place on the whippletree.

18. one kind pad, it is arranged on the whippletree of barbell, and the power that the whippletree applies is dispersed in and utilizes the barbell In the larger area of the shoulder of the people to perform physical exercise, neck, and/or chest, the pad includes：It is elasticity, highly compressible Cross section foam, that there is annular slender body, the body has from the extension of the opposite end of center section and court The bow part increased to the end diameter of the body, and extend and towards described from the bow part The convex bending part that the end diameter of body further increases, wherein, the bow part and the convex bending part Ogee is formed, the ogee meets the profile of the shoulder of the people to be performed physical exercise using barbell, neck and/or chest, The body also has the aduncate end sections that diameter reduces between the end of the ogee and the body.

19. pad according to claim 18, including slit, the slit extend the length of the body, and allow The part of the body on the opposite side of the slit separates and is mounted in the pad on the whippletree or from described Whippletree allows the whippletree to pass through them when removing.

20. pad according to claim 19, wherein, the pad is clamped in by the horizontal stroke by the elasticity of the foam On thick stick, the pad is held in place on the whippletree.