Electric headrest adjusting structure of child safety seat
Technical Field
The utility model relates to a children's articles for use technical field, concretely relates to children's safety seat's electronic head rest adjusts structure.
Background
At present, almost no electrically adjustable child safety seat is available on the market; most are manually adjustable seats.
In addition, the existing headrest needs to loosen the safety belt before moving up and down to be adjusted, and if the existing manual structure is additionally provided with an electric structure, once a user forgets to loosen the safety belt, the motor is blocked and is easy to damage; and manual techniques are mostly complex to use, easy to operate by mistake and easy to damage.
Disclosure of Invention
The to-be-solved technical problem of the utility model is, to the above-mentioned defect that prior art exists, provide a children's safety seat's electronic head rest regulation structure, can realize the high automatic stepless regulation of the relative seat chair body of head rest body, simple structure, it is with low costs, regulation stability is high.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
an electric headrest adjusting structure of a child safety seat comprises a headrest body, a seat body, a lead screw, a driving motor and a fixed mounting plate, wherein the lead screw is vertically arranged on the seat body, a lead screw nut is sleeved on the lead screw, one end of the lead screw is connected with the driving motor, the fixed mounting plate is connected with the lower end of the headrest body, and the fixed mounting plate is connected with the lead screw nut and is in sliding connection with the seat body; the driving motor drives the screw rod to rotate, and the headrest body is driven to move up and down along the chair body through the screw rod nut and the fixed mounting plate.
According to the technical scheme, the two sides of the screw rod are provided with the slideways which are arranged in parallel to the screw rod, the two ends of the fixed mounting plate are respectively arranged on the two slideways, and the fixed mounting plate moves back and forth along the slideways.
According to the technical scheme, the slideway is provided with a first limit switch, the first limit switch is used as a limit position limit of the fixed mounting plate on the slideway, and the limit distance of the headrest body for adjusting the height is controlled; first limit switch arranges in the tip of slide, and the number is two.
According to the technical scheme, the second limit switch is arranged on the slide way, when the fixed mounting plate is lower than the second limit switch, the seat on the seat body faces the rear part of the automobile, and when the fixed mounting plate is higher than the second limit switch, the seat on the seat body faces the rear part of the automobile or the front part of the automobile.
According to the technical scheme, the end part of the slide way is provided with the limit stop, and the two ends of the slide way are provided with the limit stop.
According to the technical scheme, the headrest body is provided with the hole outlet, the upper end of the seat body is transversely provided with the reserved rod, one end of the safety belt is connected with the buckle at the front end of the seat body, the other end of the safety belt penetrates through the hole outlet in the headrest body to the back of the seat body, and the safety belt winds around the reserved rod from top to bottom along the back of the seat body to the front end of the seat body.
According to the technical scheme, the bottom of the seat body is provided with the anti-slip block, and the safety belt winds around the rear edge of the reserved rod and winds to the front end of the seat body from top to bottom through the anti-slip block along the back of the seat body.
According to the technical scheme, the upper end of the driving motor and/or the upper end of the screw rod are fixedly arranged on the seat body through the upper fixing block, and the lower end of the screw rod is fixedly arranged on the seat body through the lower fixing block.
According to the technical scheme, the back of the seat body is provided with the groove, the screw rod, the driving motor and the fixed mounting plate are arranged in the groove, and the lower end of the headrest body is inserted into the groove in the back of the seat body.
According to the technical scheme, two side strips are arranged on two sides of the screw rod, the two side strips form an installation groove, the driving motor and the screw rod are arranged in the installation groove, the upper fixing block and the lower fixing block are arranged on the upper surface of the installation strip, and the driving motor is covered in the installation groove; the side edge strips are arranged in the grooves.
The utility model discloses following beneficial effect has:
1. the structure can realize the automatic stepless adjustment of the height of the headrest body relative to the seat body, and has the advantages of simple structure, low cost and high adjustment stability.
2. The groove is formed in the back of the seat body, and the screw rod, the driving motor and the fixed mounting plate are arranged in the groove, so that the problems that the motor and a transmission mechanism thereof occupy large space and are difficult to realize in small space are solved; the safety belt is wound on the reserved rod, and the headrest body can be adjusted up and down without adjusting the safety belt.
Drawings
Fig. 1 is a schematic structural view of an electric headrest adjusting structure of a child safety seat according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of an electric headrest adjusting structure of a child safety seat according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view illustrating an electric headrest adjusting structure of a child safety seat according to an embodiment of the present invention;
in the figure, 1-headrest body, 2-seat body, 3-screw rod, 4-driving motor, 5-screw rod nut, 6-fixed mounting plate, 7-reserved rod, 8-safety belt, 9-outlet hole, 10-upper fixed block, 11-limit stop, 12-slideway, 13-first limit switch, 14-lower fixed block, 15-anti-slip block, 16-side edge strip and 17-second limit switch.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, the present invention provides an electric headrest adjusting structure of a child safety seat in an embodiment, including a headrest body 1, a seat body 2, a lead screw 3, a driving motor 4 and a fixing and mounting plate 6, wherein the lead screw 3 is vertically arranged on the seat body 2, the lead screw 3 is sleeved with a lead screw nut 5, one end of the lead screw 3 is connected with the driving motor 4, the fixing and mounting plate 6 is connected with a lower end of the headrest body 1, and the fixing and mounting plate 6 is connected with the lead screw nut 5 and is slidably connected with the seat body; the driving motor 4 drives the screw rod 3 to rotate, and the headrest body 1 is driven to move up and down along the seat body 2 through the screw rod nut 5 and the fixed mounting plate 6.
Further, the two sides of the screw rod 3 are provided with a slide way 12 arranged in parallel with the screw rod 3, the two ends of the fixed mounting plate 6 are arranged on the slide way 12, and the fixed mounting plate 6 moves back and forth along the slide way 12.
Furthermore, a first limit switch 13 is arranged on the slideway 12, the first limit switch 13 is used as a limit position limit of the fixed mounting plate on the slideway, and the limit distance of the headrest body for adjusting the height is controlled; first limit switch 13 arranges in the tip of slide, and the number is two.
Further, a second limit switch 17 is arranged on the slide way 12, when the fixed mounting plate is lower than the second limit switch 17, the seat on the seat body faces the rear of the automobile, and when the fixed mounting plate is higher than the second limit switch 17, the seat on the seat body faces the rear or the front of the automobile; the rotation function of the seat body 2 is controlled by the second limit switch 17, so that the seat is prevented from being used forward by mistake when the height of the child matched with the height of the headrest body 1 is not enough.
Furthermore, a limit stop 11 is arranged at the end part of the slideway 12; for preventing the headrest body 1 from coming off the seat body 2.
Furthermore, a hole 9 is arranged on the headrest body 1, a reserved rod 7 is transversely arranged at the upper end of a groove arranged on the back of the seat body 2, one end of a safety belt 8 is connected with a buckle at the front end of the seat body 2, the other end of the safety belt penetrates through the back of the seat body 2 from the hole 9 on the headrest body 1, and the safety belt bypasses the reserved rod 7 and then winds to the buckle at the front end of the seat body 2 along the back of the seat body 2 from top to bottom; when the driving motor 4 drives the headrest body 1 to move up and down through the screw rod 3 and the screw rod nut 5, the safety belt 8 can act along with the headrest body 1, if the safety belt 8 is not provided for reserving the rod 7, the safety belt 8 must be loosened firstly to normally move up and down because the lower surface of the safety belt 8 is fixed and cannot move, and the headrest body 1 can be adjusted up and down without adjusting the safety belt 8 after the reserved rod 7 is provided.
Furthermore, the bottom of the seat body 2 is provided with a non-slip block 15, and the safety belt 8 bypasses the rear edge of the reserved rod 7 and bypasses the non-slip block 15 from top to bottom along the back of the seat body 2 to be wound to the front end of the seat body 2 for buckling.
Further, the upper end of the driving motor 4 and/or the screw rod 3 is fixedly arranged on the seat body 2 through an upper fixing block 10, and the lower end of the screw rod 3 is fixedly arranged on the seat body 2 through a lower fixing block 14.
Further, the back of the seat body 2 is provided with a groove, the screw rod 3, the driving motor 4, the fixed mounting plate 6 and the slide rail 12 are all arranged in the groove, and the lower end of the headrest body 1 is inserted into the groove in the back of the seat body 2.
Further, two side strips 16 are arranged on two sides of the screw rod 3, the side strips 16 are arranged in grooves in the back of the seat body 2, a mounting groove is formed by the two side strips 16, the driving motor 4 and the screw rod 3 are arranged in the mounting groove, the upper fixing block 10 and the lower fixing block 14 are arranged on the upper surface of the side strips 16, and the driving motor 4 is covered in the mounting groove; the fixed mounting plate 6 is arranged above the side edge strips 16; the side bar 16 is disposed in a groove in the back of the seat body 2.
Furthermore, the fixed mounting plate 6 is made of iron sheets; head rest body 1 is connected fixedly with fixed iron sheet, and screw-nut 5 welding is on fixed mounting panel 6 simultaneously, and driving motor 4 drives screw-nut 5 and removes, and screw-nut 5 drives fixed mounting panel 6 and removes, and fixed mounting panel 6 drives head rest body 1 and removes, and because fixed mounting panel 6 belongs to the atress piece simultaneously, iron sheet material intensity is higher, avoids the atress of head rest body 1 to warp back motor regulatory function inefficacy.
The safety belt 8 is a five-point safety belt 8, the safety belt 8 comprises an inverted triangle belt arranged at the back of the seat body 2, the upper end of the inverted triangle is connected with two connecting safety belts, and the lower end of the inverted triangle is connected with one connecting safety belt.
The utility model discloses a theory of operation: an electric headrest adjusting structure of a child safety seat comprises a driving device, a driving structure, a headrest body 1 and the like. The driving device comprises a screw rod 3 and a driving motor 4, and the driving motor 4 and the screw rod 3 are fixed on the body through an upper fixing block 14 and a lower fixing block 14; the driving motor 4 drives the lead screw nut 5 through the lead screw 3, the lead screw nut 5 is welded on the fixed iron sheet of the headrest body 1, and the headrest body 1 is relatively fixed on the seat body 2 through the fixed iron sheet and can slide in the backrest groove of the seat body 2. In the step, a limit switch can be arranged on the backrest of the seat body 2, when the fixed iron sheet is pushed to a certain height, the motor stops, and the rotating limit switch on the base can be matched to meet the requirement that the children safety seat can be used in the forward direction (can rotate to the forward direction) when the height of the children reaches 83 cm. Meanwhile, the maximum distance of headrest adjustment is limited by a limit switch, so that the common mode of a child safety seat used by a child with the height of 40-150cm and a safety seat used by a child with the height of 40-105cm can be easily realized.
Meanwhile, the height of the headrest can be directly adjusted under the condition that the safety belt is not loosened by matching with the safety belt reserved rod 7, the safety belt does not need to be loosened firstly like other electric headrests, and the motor is easy to damage due to the fact that the safety belt is not loosened.
The above is only a preferred embodiment of the present invention, and the scope of the right of the present invention should not be limited by this, so that the equivalent changes made in the claims of the present invention still belong to the protection scope of the present invention.