The chair headrest of band neck support function
Technical field
The present invention relates to a kind of headrest, particularly relate to a kind of chair headrest with neck support function.
Background technology
Most of chair headrest in the market only plays protection and supporting role to occupant's head within the specific limits, and not having independently, neck brace mechanism realizes occupant's neck is effectively supported.The head rest adjusting device of part vehicle can play certain flank coating effect to occupant's neck, but does not reach the needed Support Position of neck as yet, and the neck brace that the occupant still need purchase automobile later stage market increases the traveling comfort of neck.
Summary of the invention
Main purpose of the present invention is: provide a kind of simple in structure, the chair headrest of the band neck support function of dependable performance.
For achieving the above object, the invention provides a kind of chair headrest with neck support function, include a head rest body, it also includes a neck brace and neck brace control apparatus; Described neck brace control apparatus includes one group of slide bar, guide pin bushing, metal tube, and described guide pin bushing and metal tube are fixedly installed on the head rest body, and guide pin bushing is fixed in the metal tube, and described slide bar one end is fixedly installed on the neck brace, and other end slide bar is located in the described guide pin bushing; Described slide bar is provided with gear groove, fastening groove, but and the fastening groove of the corresponding described slide bar of described guide pin bushing be provided with the card of the described fastening groove of buckle;
The gear groove of described slide bar is the groove that has the inclined-plane, and its degree of depth is 1.2mm~1.7mm, and the opening angle on its inclined-plane is 130 °~160 °;
The fastening groove of described slide bar is that one side is the inclined-plane, and another side is the groove of facing directly;
The card two ends shock mount of described guide pin bushing, and have slotted hole in the middle of the described card, a backing pin is assemblied in the middle of the slotted hole;
The bottom of described guide pin bushing is opened groove and it is divided into two lobes is taken the shape of the letter U;
Described guide pin bushing top increases a plurality of convex tendons and metal tube interference fit;
Described guide pin bushing bottom is provided with U shaped metal pipe clamp sheet, its external diameter and metal tube internal diameter interference fit;
Described guide pin bushing middle part is provided with two slide bar cards, its internal diameter and slide bar external diameter interference fit certain-length;
Be nonparallel structure between the described slide bar, on it is horizontal and vertical, have departure;
The lateral deviation amount of described slide bar and along track bias amount are 1.5mm~3.5mm.
The degree of depth of the gear groove among the present invention is located in 1.2mm~1.7mm scope, opening angle is located in 130 °~160 ° the scope, in this scope, can guarantee: when occupant's neck when neck brace applies rearward-directed force certain between 30N~75N scope, card will skid off the gear groove, neck brace promptly slides to the head rest body end, thereby alleviated impact, to guarantee occupant's neck safety.
The present invention is the function that the seat headrest is increased neck support, and is simple in structure, easy to operate, safe and reliable, and total compactness, small and exquisite, finally reached comfortable, attractive in appearance, practical purpose.
Description of drawings
Fig. 1 is a structure cut-away view of the present invention;
Fig. 2 is the schematic cross-section of place, two slide bar center of the present invention face;
Fig. 3 is slide bar of the present invention, plastics guide pin bushing and metal tube mounting structure scheme drawing;
Fig. 4 is a plastics guide pin bushing structural representation of the present invention;
Fig. 5 is the assembling exploded view of plastics guide pin bushing of the present invention and metal tube;
Fig. 6 is a plastics guide pin bushing plan sketch of the present invention;
Fig. 7 a is a lateral deviation scheme drawing between two slide bars of the present invention;
Fig. 7 b is an along track bias scheme drawing between two slide bars of the present invention; And
Fig. 8 is a use scheme drawing of the present invention.
The specific embodiment
As shown in Figure 1, the chair headrest of band neck support function of the present invention includes a head rest body 10, one neck braces 20, and neck brace control apparatus 30; Described neck brace 20 is made up of neck brace soft layer 21 and neck brace clad 22; Described head rest body 10 is by head rest body skeleton 11, and head rest body soft layer 12 and head rest body clad 13 are formed; Described neck brace control apparatus 30 includes one group of slide bar 31, plastics guide pin bushing 32, metal tube 35, stay bearing plate 33, support 34; In conjunction with shown in Figure 2, described plastics guide pin bushing 32, support 34, metal tube 35 are fixedly installed on the head rest body 10, and stay bearing plate 33 is fixedly installed on the neck brace 20, the present invention uses two slide bars 31,32, two sections metal tubes 35 of two plastics guide pin bushings, support 34 two ends are fixedly arranged on respectively on the head rest body skeleton 11 of head rest body 10, two metal tubes 35 are fixed on the support 34, and two plastics guide pin bushings 32 are separately fixed in the metal tube 35.
One end can pass metal tube 35 when making plastics guide pin bushing 32 assembling, as shown in Figure 4, open groove 324 in the insertion end of plastics guide pin bushing 32 it is divided into two lobes 325,326 that take the shape of the letter U, as shown in Figure 5, in insertion end two lobes 325,326 of plastics guide pin bushing 32 when the metal tube 35, receive like this, fully by back two lobes 325,326 by self elastic force open with metal tube 35 cards only; Plastics guide pin bushing 32 and being welded between the metal tube 35 on the head rest body skeleton 11 to the chucking relation for guaranteeing fitting tight between the two, in conjunction with shown in Figure 6, increases a plurality of convex tendons 329 and metal tube 35 appropriate interference fit on plastics guide pin bushing 32 tops; Be provided with U shaped metal pipe clamp sheet 3250 in plastics guide pin bushing 32 bottoms, itself and metal tube 35 lower end abutment, the internal diameter 351 appropriate interference fit of its external diameter 3251 and metal tube 35 are with gap of eliminating plastics guide pin bushing 32 and metal tube 35 and the generation that prevents vibration noise; Be the cliding friction relation between slide bar 31 and the plastics guide pin bushing 32, is free-running fit at the top of plastics guide pin bushing 32 internal diameter 3281 with slide bar external diameter 310, for guaranteeing that neck brace assembles smoothly, be provided with two slide bar cards 328 at the middle part of plastics guide pin bushing 32, two U types perforate 3283 is left at the middle part of plastics guide pin bushing 32, structure is a slide bar card 328 in the middle of it, slide bar card 328 can freely open and shrink, its internal diameter 3280 is 3282 with slide bar external diameter 310 for the interference fit certain-length, by adjusting magnitude of interference scalable friction force between the two.
In order to eliminate rocking and vibration noise between slide bar 31 and the plastics guide pin bushing 32, be nonparallel structure between two slide bars 31, on it is horizontal and vertical, there is departure; Shown in Fig. 7 a, there is departure 3101 in two slide bars 31 between laterally, and its value is 1.5mm~3.5mm; Shown in Fig. 7 b, there is departure 3102 in two slide bars 31 between vertically, and its value is 1.5mm~3.5mm; Like this slide bar 31 can with plastics guide pin bushing 32 assembling after, thereby its two ends will partly fit and eliminate tolerance clearance between plastics guide pin bushing 32 and the slide bar 31, reach elimination and rock effect with vibration noise; Smoothness when operating for improving neck brace is coated with appropriate lubricating grease between slide bar 31 and plastics guide pin bushing 32.
As shown in Figure 2, two slide bars, 31 1 end vertical fixing are installed on the stay bearing plate 33 of neck brace 20, and the other end is slidedly arranged in the described plastics guide pin bushing 32; As shown in Figure 3, described slide bar 31 is provided with gear groove 311, fastening groove 312, gear groove 311 is for having the groove on inclined-plane, its degree of depth is 1.2mm~1.7mm, the opening angle on its inclined-plane is 130 °~160 °, and every a determining deviation be located on the slide bar 31, fastening groove 312 is that one side is the inclined-plane, another side is the groove of facing directly, and but the fastening groove 312 of described plastics guide pin bushing 32 corresponding described slide bars 31 is provided with the card 321 of the described fastening groove 312 of buckle, as shown in Figure 4, described plastics guide pin bushing 32 1 ends are a head end 320, in this head end 320, be formed with the tank 3200 and two spring grooves 3201 of a ccontaining card 321, be provided with a pin-and-hole 3202 that passes tank 3200 at this head end 320 for the centre hole side that slide bar 31 wears in addition, one side of this card 321 is provided with a pushing block 3210, in this inboard, pushing block 3210 two ends one spring 322 is housed respectively, in the middle of card 321, have a bigger hole clipping 3211, and offer a slotted hole 327 on these hole clipping 3211 next doors, be that card 321 is contained in the tank 3200 during assembling, spring 322 is contained in the spring groove 3201, backing pin 323 passes the pin-and-hole 3202 on the head end 320 when assembling and is arranged in the slotted hole 327 of card 321, plays position-limiting action; When neck brace 20 slides into the card of locating foremost and ends state, card 321 in the plastics guide pin bushing 32 makes the edge of its hole clipping 3211 drop in the fastening groove 312 of slide bar 31 under the application force of spring 322, card 321 contacts with facing directly of fastening groove 312, neck brace 20 realizes that card ends state, card 321 is fitted with the surface of slide bar 31 under the effect of spring force all the time, when its by slide bar on during every the gear groove 311 of certain pitch arrangement, can in neck brace 20 control processs, realize the amount of movement prompt facility.
As shown in Figure 8, neck brace 20 is realized regulating before and after it by sliding in the plastics guide pin bushing 32 of slide bar 31 on being fixed in head rest body 10, because neck brace 20 is installed on the head rest body 10, but head rest body 10 up-and-down movements, neck brace 20 can be realized up-down adjustment when headrest body 10 up-and-down movements, the upper-lower position that the occupant can be by regulating head rest body 10 and the front and back position of neck brace 20 are realized the support to neck, neck brace 20 relatively and head rest body 10 certain amount of shifting out is arranged, the occupant can regulate the spacing of neck brace 20 and neck according to demand; In conjunction with shown in Figure 1, after neck brace 20 was drawn out, its bearing force that offers passenger's neck mainly was made of the friction force between slide bar 31 and the plastics guide pin bushing 32; When being in an emergency, suddenly brake or vehicle hit after taking place, when being knocked into the back, occupant's head can move backward, gear groove 311 depth of groove 1.2mm~1.7mm, design that the inclined-plane opening angle is 130 °~160 ° has guaranteed that occupant's neck is when neck brace 20 applies rearward-directed force between 30N~75N, card 321 will skid off current gear groove 311, neck brace 20 promptly slides to head rest body 10, thereby alleviated impact, also be provided with certain thickness neck brace soft layer 21 between the stay bearing plate 33 of the contact surface of neck brace 20 and occupant's neck to the neck brace, to guarantee occupant's neck safety and comfort.