CN209351279U - Headrest guide sleeve - Google Patents

Abstract

The utility model discloses a kind of headrest guide sleeve, comprising: guide sleeve body and lock ring.Guide sleeve body is hollow tube body, has the inner chamber body of perforation, and head rest pole is passed through from the inner chamber body of guide sleeve body.Lock ring is mounted in guide sleeve body, the position of lock ring locking head rest pole, and head rest pole drops to extreme lower position, and lock ring blocks head rest pole, and head rest pole is prevented to continue to move down.The headrest guide sleeve of the utility model limits the extreme lower position of head rest pole, so that head rest pole cannot continue to decline after dropping to extreme lower position, reduces head rest pole and a possibility that stuck occurs, so that headrest can provide superior safety and comfort for passenger.The headrest guide sleeve is simple and reliable for structure, versatile.

Description

Headrest guide sleeve

Technical field

The utility model relates to field of automobile parts and components, more specifically to the components in headrest external member.

Background technique

Chair headrest is the important link of car comfort configuration, and in order to meet the needs of different stature passengers, headrest is all It is configured to height-adjustable form.Fig. 1 a and Fig. 1 b disclose the structure chart of headrest, and wherein it is present to disclose installation by Fig. 1 a The overall structure figure of headrest on chair, Fig. 1 b disclose the decomposition chart of headrest.With reference to shown in Fig. 1 a, whole headrest is installation At the top of seat.With reference to shown in Fig. 1 b, headrest includes headrest guide sleeve 102, head rest pole 104, head pillow frame 106 and headrest foaming Body 108.Headrest guide sleeve 102 is fixedly mounted in seat.Head rest pole 104 is passed through from headrest guide sleeve 102, and headrest guide sleeve 102 rises To the effect of bracket.Head pillow frame 106 is mounted on the top of head rest pole 104, and headrest foaming body 108 is mounted on head pillow frame 106 Outside.Head rest pole 104 can be gone up and down in headrest guide sleeve 102, drive head pillow frame 106 and headrest foaming body at the top of it 108 1 liftings.

Since the working condition of headrest is vertical state, under self gravitation effect of resting the head on, entire headrest features can be automatic Form the trend to downslide.Therefore, usually consider it is all that one preventions of setting rests the head on and glides, that is, prevent head rest pole 104 to moving down Dynamic retention device will rest the head on and maintain required height.So the blocking of retention device can be experienced by headrest downwards Effect, and plug pillow will not then be experienced in addition to any other unexpected resistance of gravity upwards.This set makes collision status Under headrest be in a kind of unsafe state.When colliding, it is easy to generate headrest the case where moving up, at this time by In no any retention device, headrest can fly out from seat, and occupant is made to lose cephalic protection.Under certain complex situations, fly Headrest out is also possible to that secondary injury can be caused to occupant.

The case where headrest flies out in order to prevent can increase warp architecture in the bottom of head rest pole, and warp architecture can be in head Pillow bar hooks seat body when excessively moving upwards, prevents headrest from flying out.Under normal conditions, the extreme lower position of decline of resting the head on is exactly The position that head pillow frame 106 is contacted with seat tops.This is that head rest pole also correspondingly drops to extreme lower position.But some In the case of, such as coupling part aging or when by accidental shock, in fact it could happen that head rest pole loosens and continues with head pillow frame The case where moving down.When head rest pole surprisingly slips down to except scope of design, the warp architecture of head rest pole bottom will be contacted Other component in seat, or be stuck in headrest guide sleeve, cause head rest pole stuck, can not move up.

Utility model content

The utility model proposes a kind of novel headrest guide sleeves, can limit the down position of head rest pole.

An embodiment according to the present utility model, proposes a kind of headrest guide sleeve, comprising: guide sleeve body and lock ring.Guide sleeve Ontology is hollow tube body, has the inner chamber body of perforation, and head rest pole is passed through from the inner chamber body of guide sleeve body.Lock ring is mounted on In guide sleeve body, the position of lock ring locking head rest pole, head rest pole drops to extreme lower position, and lock ring blocks head rest pole, prevents Head rest pole continues to move down.

In one embodiment, locking ring set has intilted lock banking stop outside guide sleeve body on lock ring.

In one embodiment, there is card slot, head rest pole drops to extreme lower position, and lock banking stop is caught in card slot on head rest pole In, lock ring prevents head rest pole from continuing to move down.

In one embodiment, the cross sectional shape phase of the outer profile of the cross sectional shape and head rest pole of the inner chamber body of guide sleeve body Matching.

In one embodiment, the cross sectional shape of the outer profile of the inner chamber body and head rest pole of guide sleeve body make head rest pole with Fixed angle is loaded into inner chamber body.

In one embodiment, there is location structure in lock ring and guide sleeve body, location structure makes lock ring with solid Determine angle to be enclosed in outside guide sleeve body.

In one embodiment, under fixed angle, the position of card slot and lock banking stop aligns.

In one embodiment, the mechanical strength of the material of lock ring and lock banking stop is less than the material of guide sleeve body and head rest pole The mechanical strength of matter.

In one embodiment, which further includes guide sleeve the cover, and guide sleeve the cover is mounted on the top of guide sleeve body, In guide sleeve the cover there is aperture to pass through for head rest pole.

The headrest guide sleeve of the utility model limits the extreme lower position of head rest pole, so that head rest pole is dropping to extreme lower position After cannot continue to decline, reduce head rest pole occur it is stuck a possibility that so that headrest superior safety can be provided for passenger Property and comfort.The headrest guide sleeve is simple and reliable for structure, versatile.

Detailed description of the invention

The above and other feature of the utility model, property and advantage will pass through with reference to the accompanying drawings and examples It describes and becomes apparent, identical appended drawing reference always shows identical feature in the accompanying drawings, in which:

Fig. 1 a discloses the overall structure figure of the headrest of installation on the seat.

Fig. 1 b discloses the decomposition chart of headrest.

Fig. 2 a discloses the overall structure figure of the headrest guide sleeve of an embodiment according to the present utility model.

Fig. 2 b discloses the decomposition chart of the headrest guide sleeve of an embodiment according to the present utility model.

Fig. 3 a discloses longitudinal view of the headrest guide sleeve of an embodiment according to the present utility model.

Fig. 3 b discloses the view in transverse section of the headrest guide sleeve of an embodiment according to the present utility model.

Fig. 4 discloses the course of work of the headrest guide sleeve of an embodiment according to the present utility model.

Specific embodiment

With reference to shown in Fig. 2 a and Fig. 2 b, Fig. 2 a and Fig. 2 b disclose the headrest guide sleeve of an embodiment according to the present utility model Structure chart.Wherein Fig. 2 a discloses its overall structure figure, and Fig. 2 b discloses its decomposition chart.As shown, the headrest is led Set includes: guide sleeve body 202 and lock ring 204.Guide sleeve body 202 is hollow tube body, has the inner chamber body of perforation, head rest pole 206 (head rest pole 206 can refer to Fig. 4) pass through from the inner chamber body of guide sleeve body 202.Lock ring 204 is mounted on guide sleeve body 202 On, the position of 204 locking head rest pole 206 of lock ring.When head rest pole 206 drops to extreme lower position, lock ring 204 blocks head rest pole 206, prevent head rest pole 206 from continuing to move down.In the illustrated embodiment, which further includes guide sleeve the cover 208, is led Set the cover 208 is mounted on the top of guide sleeve body 202.In guide sleeve the cover 208 there is aperture to pass through for head rest pole 206.

As shown in figures 2 a and 2b, 204 sets of lock ring outside guide sleeve body 202, on lock ring 204 have intilted lock Limited step 241.Refering to what is shown in Fig. 4, Fig. 4 discloses the course of work of the headrest guide sleeve of an embodiment according to the present utility model.Head Resting the head on has card slot 261 on bar 206, head rest pole 206 drops to extreme lower position, and lock banking stop 241 is caught in card slot 461, thus locking Ring 204 prevents head rest pole 206 from continuing to move down.In the utility model, lock ring 204 directly blocks head using lock banking stop 241 The card slot 261 on bar 206 is rested the head on, so that head rest pole 206 itself is directly limited.In the prior art, the whole limit of headrest is logical Head pillow frame and seat is crossed to realize, head rest pole directly being limited, but by the connection of head rest pole and head pillow frame into Limit is in the ranks connect, therefore when connecting loosening, head rest pole still can continue to move down.In the utility model, lock ring is straight It connects and acts on head rest pole itself, head rest pole is prevented to continue to move down.

Intensity in head rest pole considers, can only open card slot at one on head rest pole, correspondingly, on lock ring also only one Lock banking stop.In order to ensure card slot and lock banking stop can be mutually aligned, the utility model has carried out following design: guide sleeve body The cross sectional shape of the outer profile of inner chamber body and head rest pole is designed to irregular shape, so that head rest pole can only fixed angle quilt It is fitted into inner chamber body.With reference to shown in Fig. 3 a and Fig. 3 b, Fig. 3 a discloses the headrest guide sleeve of an embodiment according to the present utility model Longitudinal view, Fig. 3 b discloses the view in transverse section of the headrest guide sleeve, and the position in section is A-A in Fig. 3 a to exactly Position where lock banking stop 241.With reference to shown in Fig. 3 b, the inner chamber body of guide sleeve body is similar round, but increases in round one end Plane, while increasing inside protrusion in circular two sides.The cross sectional shape of the inner chamber body of guide sleeve body and head rest pole The cross sectional shape of outer profile matches.Correspondingly, the cross sectional shape of the outer profile of head rest pole be also it is similar round, but circular one End is plane, has inside groove in circular two sides.In this way, head rest pole can only fixed angle be loaded into inner chamber body.Together Sample, with reference to shown in Fig. 2 a, Fig. 2 b and Fig. 3 a, there is location structure, such as locating slot on lock ring 204 and guide sleeve body 202 And locating plate.Lock ring 204 is made equally to be enclosed in guide sleeve with fixed angle by the location structure that locating slot and locating plate form Outside ontology 202.In this way, head rest pole 206, guide sleeve body 202 and lock ring 204 are all limited in same fixed angles during installation Under degree, in this way, can be achieved with the alignment of card slot and lock banking stop, i.e., under fixed angle, the position of card slot and lock banking stop is opposite Neat.

In terms of material, head rest pole is usually metal material, guide sleeve body, lock ring and lock banking stop can using metal or Person's plastic material.When selecting material, need to meet following intensity requirement: the mechanical strength of the material of lock ring and lock banking stop Less than the mechanical strength of guide sleeve body and the material of head rest pole.

The headrest guide sleeve of the utility model limits the extreme lower position of head rest pole, so that head rest pole is dropping to extreme lower position After cannot continue to decline, reduce head rest pole occur it is stuck a possibility that so that headrest superior safety can be provided for passenger Property and comfort.The headrest guide sleeve is simple and reliable for structure, versatile.

Above-described embodiment, which is available to, is familiar with person in the art to realize or using the utility model, be familiar with ability The personnel in domain can in the case where not departing from the utility model thought of the utility model, to above-described embodiment make various modifications or Variation, thus the protection scope of the utility model is not limited by above-described embodiment, and should meet claims to mention Inventive features maximum magnitude.

Claims (9)

1. a kind of headrest guide sleeve characterized by comprising

Guide sleeve body, guide sleeve body are hollow tube body, have the inner chamber body of perforation, head rest pole is from the inner chamber body of guide sleeve body It passes through；

Lock ring is mounted in guide sleeve body, and the position of lock ring locking head rest pole, head rest pole drops to extreme lower position, locking Ring blocks head rest pole, and head rest pole is prevented to continue to move down.

2. headrest guide sleeve as described in claim 1, which is characterized in that the locking ring set is outside guide sleeve body, on lock ring With intilted lock banking stop.

3. headrest guide sleeve as claimed in claim 2, which is characterized in that there is card slot, head rest pole drops on the head rest pole Extreme lower position, lock banking stop are caught in card slot, and lock ring prevents head rest pole from continuing to move down.

4. headrest guide sleeve as claimed in claim 3, which is characterized in that the cross sectional shape and head rest pole of the inner chamber body of guide sleeve body The cross sectional shape of outer profile match.

5. headrest guide sleeve as claimed in claim 4, which is characterized in that the outer profile of the inner chamber body and head rest pole of guide sleeve body Cross sectional shape makes head rest pole be loaded into inner chamber body with fixed angle.

6. headrest guide sleeve as claimed in claim 5, which is characterized in that there is location structure on lock ring and guide sleeve body, it is fixed Bit architecture is enclosed in lock ring outside guide sleeve body with fixed angle.

7. headrest guide sleeve as claimed in claim 6, which is characterized in that under the fixed angle, the position of card slot and lock banking stop It sets and aligns.

8. headrest guide sleeve as claimed in claim 2, which is characterized in that the mechanical strength of the material of lock ring and lock banking stop is less than The mechanical strength of guide sleeve body and the material of head rest pole.

9. headrest guide sleeve as described in claim 1, which is characterized in that further include guide sleeve the cover, guide sleeve the cover is mounted on guide sleeve The top of ontology there is aperture to pass through for head rest pole in guide sleeve the cover.