CN211559462U - Headrest mechanism is prevented pressing from both sides by tilting - Google Patents
Headrest mechanism is prevented pressing from both sides by tilting Download PDFInfo
- Publication number
- CN211559462U CN211559462U CN201922363355.8U CN201922363355U CN211559462U CN 211559462 U CN211559462 U CN 211559462U CN 201922363355 U CN201922363355 U CN 201922363355U CN 211559462 U CN211559462 U CN 211559462U
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- headrest
- driving motor
- pinch
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- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000005070 sampling Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- 235000013559 Schnittsellerie Nutrition 0.000 description 1
- 244000169997 Schnittsellerie Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/38—Support for the head or the back for the head
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- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
The utility model discloses a tiltable anti-pinch headrest mechanism, which comprises a driving mechanism arranged on a backrest frame and headrest inclined pieces symmetrically arranged at two sides of the backrest frame, wherein the headrest inclined pieces are fixed on a headrest plate, and the driving mechanism drives the headrest inclined pieces to drive the headrest plate to rotate relative to the backrest frame; the headrest tilting member comprises a fixing member and a transmission member, the lower end of the fixing member is fixedly arranged on the backrest frame, the upper end of the fixing member is rotatably connected with the upper end of the transmission member, and the lower end of the transmission member is rotatably connected with the output end of the driving mechanism.
Description
Technical Field
The utility model belongs to the technical field of the function sofa, concretely relates to headrest mechanism is prevented pressing from both sides by tilting.
Background
Conventional functional sofas are mechanically structured to adjust the sofa to three basic positions: a closed position with the footrest retracted and the backrest substantially upright; a television position with the footrest extended and the back substantially upright; a reclined position with the footrest extended and the backrest in a reclined position. To increase the comfort of the user, in the reclined position, the headrest is allowed to pivot relative to the rest of the backrest, the rotation of the headrest providing support for the user's head and being adjustable to the most comfortable position.
While rotatable headrests have been provided in the prior art, they are relatively complex in construction and the headrest portions of the prior art are prone to pinching during headrest adjustment, and while mechanical anti-pinching has been provided, mechanical anti-pinching results in a relatively large back space.
It would be desirable, therefore, to provide a headrest structure that is structurally simplified and has a relatively small footprint, while still providing the adjustments necessary to enhance the comfort of the user.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the above-mentioned background art, the utility model provides a headrest mechanism is prevented pressing from both sides in slope.
The utility model adopts the technical proposal that: a tilted anti-pinch headrest mechanism comprises a driving mechanism arranged on a backrest frame and headrest tilting members symmetrically arranged on two sides of the backrest frame, wherein the headrest tilting members are fixed on a headrest plate, and the driving mechanism drives the headrest tilting members to drive the headrest plate to rotate relative to the backrest frame; the headrest tilting member comprises a fixing member and a transmission member, the lower end of the fixing member is fixedly arranged on the backrest frame, the upper end of the fixing member is rotatably connected with the upper end of the transmission member, and the lower end of the transmission member is rotatably connected with the output end of the driving mechanism.
Further, the driving mechanism is rotatably connected with the one-side headrest tilting member.
Furthermore, a limiting part is arranged at the upper end of the transmission part, a first limiting groove is arranged on the fixing part, and the first limiting part is matched with the first limiting groove to limit the rotation angle of the transmission part relative to the fixing part.
Furthermore, a second limiting groove is formed in the fixing piece, and the limiting piece is matched with the second limiting groove to limit the initial angle of the transmission piece.
Further, actuating mechanism include driving motor and with the control mechanism that driving motor connects, control mechanism is including the controller, motor operation control module and the current sampling module that connect gradually, the current sampling module is used for sampling in real time driving motor's current information, the controller is used for passing through motor operation control module control driving motor drive output moves, in order to drive the headrest sloping component rotates for back frame.
Further, the motor operation control module is a power driving module, and the motor operation control module is used for receiving the control signal of the control mechanism and controlling the driving motor.
Further, the one end of controller is connected with the power, the other end of controller respectively with motor operation control module with current sampling module connects, the controller is used for receiving current sampling module's current information, and driving motor withdraws the in-process of headrest sloping component judges whether driving motor's the operating current that withdraws is more than or equal to prevent the pinch current withdrawing operating current more than or equal to when preventing the pinch current, the controller passes through motor operation control module control driving motor stops to withdraw the headrest sloping component.
Has the advantages that: compared with the prior art, the utility model, have following advantage:
1. the driving mechanism of the utility model has the function of current anti-pinch stop, can realize stop in the process of withdrawing the headrest, and has the function of anti-pinch;
2. the utility model discloses a drive mechanism unilateral drive has banned the way of adopting the middle connecting pipe, and the headrest is withdrawed the in-process simultaneously and is not depended on the spring effort among the prior art, relies on driving motor to withdraw, so the part is less, and simple structure saves space, simple to operate.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a headrest tilting member of the present invention;
fig. 3 is a schematic view of the assembly of the headrest tilting member and the driving mechanism of the present invention;
fig. 4 is a schematic view of the driving mechanism of the present invention;
fig. 5 is a flowchart of a control method of the drive mechanism.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
Embodiments of the present invention generally relate to tiltable headrests or tiltable pinch resistant headrests for use on functional sofas or other furniture items. Referring to FIG. 1, an exemplary tiltable anti-pinch headrest mechanism that can move a head portion of a functional sofa between a closed position to an open position is shown. The tiltable anti-pinch headrest mechanism is mounted to the functional sofa by fixing the tiltable anti-pinch headrest mechanism to the headrest plate 1 and mounting the tiltable anti-pinch headrest mechanism to the back frame 1 together.
Referring to fig. 1, the tiltable anti-pinch headrest mechanism of the embodiment has a specific structure that a driving mechanism 4 is arranged on a backrest frame 1 and headrest tilting members 3 are symmetrically arranged on two sides of the backrest frame 1, and the driving mechanism 4 drives the headrest tilting members 3 to drive a headrest plate 2 to rotate relative to the backrest frame 1; specifically, the lower end of the fixing member 31 of the headrest tilting member 3 is fixedly mounted on the backrest frame 1, the upper end thereof is rotatably connected with the upper end of the transmission member 32 of the headrest tilting member 3, the lower end of the transmission member 32 is rotatably connected with the output end of the driving mechanism 4, and the driving mechanism 4 is fixed on the backrest frame 1 through a mounting member 5. In this embodiment, the driving mechanism 4 is rotatably connected to the single headrest tilting member 3, that is, the lower end of the transmission member 32 of only one headrest tilting member 3 is rotatably connected to the output end of the driving mechanism 4, the headrest tilting members 3 on both sides are fixedly connected to the headrest plate 2, the driving mechanism 4 drives the transmission member 32 on one side, and the transmission member on the other side is driven to rotate with the headrest plate 2 relative to the backrest frame 1 by an angle, so that the headrest plate 2 is adjusted to be in a comfortable position. In this embodiment, the output end of the driving mechanism 4 is provided with a notch, and the lower end of the transmission member 32 is disposed in the notch, so as to form a structure that the output end of the driving mechanism clamps the transmission member 32 and to enable the output end of the driving mechanism to be hinged to the lower end of the transmission member 32. The transmission member 32 is rotatably connected to the fixing member 31 by a connecting member 33, which is a rivet 33 in the embodiment disclosed.
Referring to fig. 2, in order to adjust the angle of the present embodiment more accurately, in the present embodiment, a limiting member 321 is disposed at the upper end of the transmission member 32, a first limiting groove 311 is disposed on the fixing member 31, the limiting member 321 cooperates with the first limiting groove 311 to limit the rotation angle of the transmission member 32 relative to the fixing member 31, a second limiting groove 312 is disposed on the fixing member 31, and the limiting member 321 cooperates with the second limiting groove 312 to limit the initial angle of the transmission member 32; the limiting member 321 disclosed in this embodiment is a limiting nail, a limiting bolt, a limiting pin or a limiting protrusion, and the first limiting groove 311 and the second limiting groove 312 are mounting holes, grooves, protrusions or other limiting structures matched with the limiting member. The limiting piece 321 of the present embodiment may be provided with a limiting sleeve, and the limiting sleeve is used to make the limiting angle more accurate.
As shown in fig. 4, the driving mechanism of this embodiment has a current anti-pinch locking function, can realize locking in the process of retracting the headrest, and plays a role of preventing pinching, and specifically includes a driving motor and a control mechanism connected to the driving motor, the control mechanism includes a controller, a motor operation control module and a current sampling module which are connected in sequence, the current sampling module is used for sampling current information of the driving motor in real time, and the controller is used for controlling the driving motor to drive the output end of the driving motor to move through the motor operation control module so as to drive the headrest tilting member 3 to rotate relative to the backrest frame 1; the motor operation control module is a power driving module and is used for receiving a control signal of the control mechanism and controlling the driving motor.
The one end and the power of the controller of this embodiment are connected, the other end of controller is connected with motor operation control module and current sampling module respectively, the controller is used for receiving current sampling module's current information, and withdraw headrest sloping component 3's in-process at driving motor, judge whether driving motor's the operating current of withdrawing more than or equal to prevents pressing from both sides the electric current, when withdrawing operating current more than or equal to prevents pressing from both sides the electric current, the controller stops to withdraw headrest sloping component 3 through motor operation control module control driving motor.
To more clearly illustrate the current anti-pinch locking function of the driving mechanism of the present embodiment, the working steps are described with reference to fig. 5:
and S001, receiving a headrest plate retracting instruction, starting a driving motor, and opening and retracting the headrest plate through the driving of the driving motor.
And S003, acquiring the normal working current of the driving motor. In practical applications, the instantaneous current of the motor just starting is large, and has no stability or referential, and accordingly, in some embodiments, obtaining the normal operating current of the driving motor specifically includes: and acquiring the working current of the driving motor after the driving motor is started for a preset time. Specifically, after the general driving motor is started for a period of time, the working current tends to be stable, and accordingly, the working current after the driving motor is started for a period of time can be used as the normal working current. In this embodiment, the preset time is 60-120 ms. In some embodiments, the predetermined time is preferably 100 ms.
S005, the anti-pinch current is set. Specifically, the anti-pinch current is determined using the normal operating current and the preset resistance ripple current. The preset anti-pinch resistance is firstly acquired, and is usually a resistance given to the driving motor in advance, and is generally a force for enabling a child or an infant with a small age to feel pain. And then determining preset resistance ripple current according to preset anti-pinch resistance, wherein the preset resistance ripple current is a ripple current value of the driving motor acquired after the driving motor receives the preset anti-pinch resistance. And finally adding the ripple current with the preset resistance and the normal working current to obtain the anti-pinch current.
And S007, sampling the withdrawing working current of the driving motor in real time in the process of withdrawing the headrest plate.
And S009, judging whether the withdrawing working current of the driving motor is more than or equal to the anti-pinch current. Specifically, in the process of retracting the headrest plate by the driving motor, the retracting working current of the driving motor is sampled in real time by the current sampling module and is transmitted to the controller, and whether the retracting working current of the driving motor is larger than or equal to the anti-pinch current or not is judged by the controller.
And S011, if so, controlling the driving motor to stop withdrawing the headrest plate. Specifically, if the withdrawing working current of the driving motor is larger than or equal to the anti-pinch current, the withdrawing of the driving motor is judged to be blocked, and the controller controls the driving motor to stop withdrawing the headrest plate through the motor operation control module, so that the possibility of pinching accidents caused by the fact that the headrest mechanism continues to be withdrawn can be prevented. Specifically, controlling the driving motor to stop withdrawing the headrest plate includes: and controlling the driving motor to stop running or controlling the driving motor to reversely rotate to open the headrest plate.
In practical application, in the working process of this embodiment, after the retraction button of the headrest is pressed, the driving motor is started to start retracting the headrest plate. If the withdrawing working current collected by the current sampling module in real time in the withdrawing process is smaller than the anti-pinch current, the headrest mechanism is withdrawn smoothly. If the situation that the current sampling module collects that the withdrawing working current is larger than or equal to the anti-pinch current occurs in the withdrawing process, the controller controls the driving motor to stop running immediately through the motor running control module. When the blocking is released, the driving motor is restarted to continue the retracting action until the headrest plate is retracted to the initial position.
The working current after the preset time of starting the driving motor is firstly obtained as the normal working current at the beginning of the withdrawing operation at each time, namely the normal working current is changed according to the performance of the driving motor, and the self-learning function is provided, so that the accurate normal working current can be provided when the driving motor operates at each time, and the accuracy of anti-pinch parameters is improved. The problem of driving motor because of ageing, wearing and tearing etc. cause motor operating current skew after long-term the use, thereby cause and prevent that the clamping current is inaccurate and cause the function of preventing pressing from both sides malfunctioning or can not play the effect of preventing pressing from both sides after certain live time is avoided. The safety and the sensitivity of the product are improved.
Claims (7)
1. A tiltable anti-pinch headrest mechanism comprises a driving mechanism (4) arranged on a backrest frame (1) and headrest inclined pieces (3) symmetrically arranged on two sides of the backrest frame (1), wherein the headrest inclined pieces (3) are fixed on a headrest plate (2), and the driving mechanism (4) drives the headrest inclined pieces (3) to drive the headrest plate (2) to rotate relative to the backrest frame (1); the method is characterized in that: the headrest inclined part (3) comprises a fixing part (31) and a transmission part (32), the lower end of the fixing part (31) is fixedly installed on the backrest frame (1), the upper end of the fixing part is rotatably connected with the upper end of the transmission part (32), and the lower end of the transmission part (32) is rotatably connected with the output end of the driving mechanism (4).
2. The tiltable anti-pinch headrest mechanism of claim 1, wherein: the driving mechanism (4) is rotationally connected with the one-side headrest tilting member (3).
3. The tiltable anti-pinch headrest mechanism of claim 1 or 2, wherein: the upper end of the transmission piece (32) is provided with a limiting piece (321), the fixing piece (31) is provided with a first limiting groove (311), and the first limiting piece (321) is matched with the first limiting groove (311) to limit the rotation angle of the transmission piece (32) relative to the fixing piece (31).
4. The tiltable anti-pinch headrest mechanism of claim 3, wherein: the fixing piece (31) is provided with a second limiting groove (312), and the limiting piece (321) is matched with the second limiting groove (312) to limit the initial angle of the transmission piece (32).
5. The tiltable anti-pinch headrest mechanism of claim 1 or 2, wherein: actuating mechanism (4) include driving motor and with the control mechanism that driving motor connects, control mechanism is including the controller, motor operation control module and the electric current sampling module that connect gradually, the electric current sampling module is used for sampling in real time driving motor's current information, the controller is used for passing through motor operation control module control driving motor drive output moves, in order to drive headrest sloping part (3) rotate for back frame (1).
6. The tiltable anti-pinch headrest mechanism of claim 5, wherein: the motor operation control module is a power driving module and is used for receiving a control signal of the control mechanism and controlling the driving motor.
7. The tiltable anti-pinch headrest mechanism of claim 5, wherein: the one end and the power of controller are connected, the other end of controller respectively with motor operation control module with current sampling module connects, the controller is used for receiving current sampling module's current information, and driving motor withdraws the in-process of headrest sloping piece (3), judges whether driving motor's the operating current that withdraws more than or equal to prevents the clamping current withdrawing operating current more than or equal to when preventing the clamping current, the controller passes through motor operation control module control driving motor stops to withdraw headrest sloping piece (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922363355.8U CN211559462U (en) | 2019-12-25 | 2019-12-25 | Headrest mechanism is prevented pressing from both sides by tilting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922363355.8U CN211559462U (en) | 2019-12-25 | 2019-12-25 | Headrest mechanism is prevented pressing from both sides by tilting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211559462U true CN211559462U (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922363355.8U Active CN211559462U (en) | 2019-12-25 | 2019-12-25 | Headrest mechanism is prevented pressing from both sides by tilting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211559462U (en) |
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2019
- 2019-12-25 CN CN201922363355.8U patent/CN211559462U/en active Active
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| CP03 | Change of name, title or address |
Address after: 215200 west side of Tongjin Avenue, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: Ruimai Technology Co.,Ltd. Country or region after: China Address before: 215200 west side of Tongjin Avenue, Wujiang Economic Development Zone, Suzhou City, Jiangsu Province Patentee before: REMACRO MACHINERY & TECHNOLOGY (WUJIANG) Co.,Ltd. Country or region before: China |