CN110074590B - Anti-pinch electric headrest device and control method thereof - Google Patents
Anti-pinch electric headrest device and control method thereof Download PDFInfo
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- CN110074590B CN110074590B CN201910168621.3A CN201910168621A CN110074590B CN 110074590 B CN110074590 B CN 110074590B CN 201910168621 A CN201910168621 A CN 201910168621A CN 110074590 B CN110074590 B CN 110074590B
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- driving motor
- headrest
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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
- A47C17/00—Sofas; Couches; Beds
- A47C17/86—Parts or details for beds, sofas or couches only not fully covered in a single one of the sub-groups A47C17/02, A47C17/04, A47C17/38, A47C17/52, A47C17/64, or A47C17/84; Drawers in or under beds
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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
- A47C19/00—Bedsteads
- A47C19/02—Parts or details of bedsteads not fully covered in a single one of the following subgroups, e.g. bed rails, post rails
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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
- A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
- A47C20/04—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination
- A47C20/041—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination by electric motors
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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
Abstract
The invention discloses an anti-pinch electric headrest device which comprises a headrest mechanism, a backrest mechanism, a driving motor and a control mechanism, wherein the headrest mechanism is rotationally connected with the backrest mechanism, and the middle part of a connecting rod is connected with a motor push rod through a first connecting piece; control mechanism with 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 the motion of motor push rod, in order to drive headrest mechanism expand or draw in backrest mechanism. The invention also provides a control method of the anti-pinch electric headrest device, which improves the anti-pinch safety and sensitivity of the product.
Description
Technical Field
The invention relates to the technical field of furniture manufacturing, in particular to an electric headrest device capable of preventing pinching and a control method thereof.
Background
Along with the improvement of living standard of people, products such as an electric sofa, a seat, a bed backrest and the like are more and more popularized, a headrest adjusting device is generally arranged above the electric sofa, the seat and the bed backrest, and the headrest can pivot relative to the backrest through the headrest adjusting device. When a person sits on the sofa, the back of the sofa is not only lifted, but also the waist and the head can be put up by two pillows, so that the head and the waist of the person can be cushioned, and the person feels comfortable; when the back is lowered to be flat, the back is flat and only the head is provided with a pillow when a person can lie for rest.
With the popularization of the products, the safety requirements on the products are increasingly increased. The main safety problem when using electric sofas, seats and bed backs is the problem of preventing pinching when adjusting the back. At present, most manufacturers basically adopt a fixed parameter mode when realizing an anti-pinch function. However, many factors in the whole life cycle of the system used by the product can affect the mechanical system, such as motor aging, mechanical part abrasion and the like can cause the deviation of the working current of the motor, so that the protection effect cannot be achieved after a certain use time. It is necessary to reliably prevent pinching and to prevent pinching control methods according to the above-described design.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to solve the anti-clamping problem of products such as electric sofas, seats, bed backs and the like.
In order to solve the technical problems, the invention designs an anti-pinch electric headrest device and a control method thereof aiming at the defects of the prior art, which are used for sampling normal working current firstly when a current sampling module is adopted by the existing anti-pinch control device and is started every time, so that correct anti-pinch parameters can be provided every time a driving motor runs, the automatic change of the anti-pinch parameters is realized, and the parameters are not fixed any more.
The invention provides an anti-pinch electric headrest device which comprises a headrest mechanism, a backrest mechanism, a driving motor and a control mechanism, wherein the headrest mechanism is rotationally connected with the backrest mechanism and comprises a connecting rod and a linkage part, one end of the linkage part is connected with the connecting rod, and the middle part of the connecting rod is connected with a motor push rod through a first connecting piece;
control mechanism with 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 the motion of motor push rod, in order to drive headrest mechanism expand or draw in backrest mechanism.
Further, the motor operation control module is a power driving module, and the motor operation control module is used for receiving a control signal of the control mechanism and controlling the driving motor.
Further, 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 acquireing current sampling module's current information, and driving motor withdraws headrest mechanism's in-process judges whether driving motor's the operating current that withdraws more than or equal to prevents 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 headrest mechanism.
Further, the electric headrest device further comprises an alarm, the alarm is connected with the controller, and the alarm is used for giving an alarm before controlling the driving motor to stop running.
Further, the headrest mechanism further comprises a headrest frame, and the headrest frame is fixedly connected with the linkage piece.
Further, the backrest mechanism comprises a backrest frame and a backrest frame connecting assembly, and the backrest frame is fixedly connected with the backrest frame connecting assembly.
Further, back frame coupling assembling includes dead lever and two mountings, two the mounting sets up relatively, the dead lever sets up in two between the mounting, each mounting one end with interlock spare is connected, the other end with the dead lever is connected.
Furthermore, the linkage piece is rotatably connected with the fixing piece.
Furthermore, a second connecting piece is arranged in the middle of the fixing rod, one end of the driving motor is connected with the fixing rod through the second connecting piece, and the other end of the driving motor is connected with the connecting rod through a motor push rod and the first connecting piece.
Furthermore, the first connecting piece with the motor push rod is connected through the pivot rotation, the pivot is the pin or rotates the bolt, the second connecting piece with driving motor's one end is connected through the pivot rotation, the pivot is the pin or rotates the bolt.
The invention also provides a control method of the anti-pinch electric headrest device, which comprises the following steps:
receiving a retracting instruction of the headrest mechanism, and starting a driving motor for retracting the headrest mechanism;
acquiring the normal working current of the driving motor;
setting anti-pinch current;
sampling the retracting working current of the driving motor in real time in the process of retracting the headrest mechanism;
judging whether the withdrawing working current of the driving motor is larger than or equal to the anti-pinch current or not;
and if so, controlling the driving motor to stop withdrawing the headrest mechanism.
Further, the obtaining the normal operating current of the driving motor includes: and acquiring the working current of the driving motor after the driving motor is started for a preset time, and taking the working current after the preset time as the normal working current.
Further, the preset time is 60-120 ms.
Further, prevent pressing from both sides the electric current and do driving motor's normal operating current adds with presetting resistance ripple current, obtains prevent pressing from both sides the electric current.
Further, the controlling the drive motor to stop retracting the headrest mechanism includes: and controlling the driving motor to stop running or controlling the driving motor to open the headrest mechanism.
The embodiment of the invention has the following beneficial effects:
(1) the control mechanism is provided with the motor operation control module and the current sampling module which are connected with the controller, wherein the normal working current of the driving motor is obtained through the current sampling module at the beginning of each withdrawing operation, namely the normal working current is changed according to the performance of the driving motor, and the self-learning function is added, so that the correct anti-pinch current parameters can be provided every time the driving motor operates, and the automatic change of the anti-pinch parameters is realized.
(2) The invention avoids the problem that the anti-pinch function can not be achieved after a certain using time due to inaccurate anti-pinch current caused by the deviation of the working current of the motor caused by aging, abrasion and the like of the driving motor after long-term use.
(3) The invention improves the safety and anti-pinch performance of products such as electric sofas, seats, bed backs and the like with the headrest adjusting device, so that the anti-pinch electric headrest device has more sensitive reaction, safety, high efficiency and stronger practicability, and effectively improves the user experience.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is an assembled schematic view of a headrest apparatus provided in embodiment 1 of the present invention, with parts of the structure removed for clarity of description;
fig. 2 is a schematic structural view of the electric headrest apparatus for preventing pinching provided in embodiment 1 of the present invention;
fig. 3 is a schematic view of a connection relationship between a control mechanism and a drive motor provided in embodiment 1 of the present invention;
FIG. 4 is a flowchart of a method for controlling the anti-pinch electric headrest apparatus according to embodiment 1 of the present invention;
fig. 5 is a schematic view of a connection relationship between a control mechanism and a driving motor provided in embodiment 2 of the present invention;
wherein the reference numerals are: 1-headrest mechanism, 2-backrest mechanism, 3-driving motor, 4-control mechanism, 11-headrest frame, 12-connecting rod, 13-linkage, 14-first connecting piece, 15-second connecting piece, 21-backrest frame, 22-backrest frame connecting component, 221-fixing rod, 222-fixing piece, 31-motor push rod, 40-power supply, 41-controller, 42-motor operation control module, 43-current sampling module and 44-alarm.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
Example 1:
as shown in fig. 1-3, the invention provides an anti-pinch electric headrest device, which comprises a headrest mechanism 1, a backrest mechanism 2, a driving motor 3 and a control mechanism 4, wherein the headrest mechanism 1 is rotatably connected with the backrest mechanism 2, the headrest mechanism 1 comprises a connecting rod 12 and a linkage part 13, one end of the linkage part 13 is connected with the connecting rod 12, and the middle part of the connecting rod 12 is connected with a motor push rod 31 through a first connecting part 14;
Specifically, the motor operation control module 42 is a power driving module, and the motor operation control module 42 is configured to receive a control signal from the control mechanism 4 and control the driving motor 3.
Specifically, the one end of controller 41 is connected with power 40, the other end of controller 41 respectively with motor operation control module 42 with current sampling module 43 connects, controller 41 is used for acquireing current sampling module 43's current information, and driving motor 3 withdraws headrest mechanism 1's in-process, judges whether driving motor 3 withdraws operating current more than or equal to prevents the pinch current withdrawing operating current more than or equal to when preventing the pinch current, controller 41 passes through motor operation control module 42 controls driving motor 3 stops to withdraw headrest mechanism 1.
Specifically, the headrest mechanism 1 further includes a headrest frame 11, and the headrest frame 11 is fixedly connected to the linkage 13. The backrest mechanism 2 comprises a backrest frame 21 and a backrest frame connecting assembly 22, wherein the backrest frame 21 is fixedly connected with the backrest frame connecting assembly 22. The backrest frame connecting assembly 22 includes a fixing rod 221 and two fixing members 222, the two fixing members 222 are disposed opposite to each other, the fixing rod 221 is disposed between the two fixing members 222, one end of each fixing member 222 is connected to the linkage member 13, and the other end is connected to the fixing rod 221. The linkage member 13 is rotatably connected to the fixing member 222.
In some embodiments, the headrest frame 11 and the connecting member 13, and the backrest frame 21 and the fixing member 222 may be fixed by screws, bolts, or rivets, and the headrest frame 11 and the backrest frame 21 may be of a wooden frame or a metal frame.
Specifically, a second connecting member 15 is disposed in the middle of the fixing rod 221, one end of the driving motor 3 is connected to the fixing rod 221 through the second connecting member 15, and the other end of the driving motor 3 is connected to the connecting rod 12 through a motor push rod 31 and a first connecting member 14.
Specifically, the first connecting piece 14 is rotatably connected with the motor push rod 31 through a rotating shaft, the rotating shaft is a pin or a rotating bolt, the second connecting piece 15 is rotatably connected with one end of the driving motor 3 through the rotating shaft, and the rotating shaft is a pin or a rotating bolt. The first connecting part 14 is connected with the connecting rod 12, and the second connecting part 15 is connected with the fixing rod 221 in a welding, clamping, sleeving or bolt connection mode.
The embodiment of the invention also provides a control method of the anti-pinch electric headrest device, which comprises the following steps as shown in figure 4:
and S001, receiving a retracting instruction of the headrest mechanism, and starting a driving motor for retracting the headrest mechanism.
Specifically, after a button of the headrest retracting mechanism is pressed, the controller receives a retracting instruction of the headrest mechanism and starts a driving motor for retracting the headrest mechanism, and the headrest is opened and retracted by 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 immediately after starting is relatively large, and has no stability or referential property, and accordingly, in some embodiments, the 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 the embodiment of the present specification, the preset time is 60 to 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 by using the normal working current and a preset resistance ripple current. First acquire and predetermine anti-pinch resistance, predetermine anti-pinch resistance usually for giving driving motor's a resistance in advance, generally for making the size of the less young child or the baby of age produce a power of painful sense. And then determining the preset resistance ripple current according to the preset anti-pinch resistance, wherein the preset resistance ripple current is the ripple current value of the driving motor collected after the preset anti-pinch resistance is received by the driving motor. And finally, adding the preset resistance fluctuation current 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 mechanism.
And S009, judging whether the withdrawing working current of the driving motor is more than or equal to the anti-pinch current.
Specifically, the drive motor withdraws the in-process of headrest mechanism, sample in real time through current sampling module drive motor's the operating current that withdraws and convey to the controller, judge through the controller whether drive motor's the operating current that withdraws is more than or equal to prevent pressing from both sides the electric current.
And S011, if so, controlling the driving motor to stop retracting the headrest mechanism.
Specifically, if driving motor's the operating current that withdraws more than or equal to prevent pressing from both sides the electric current, then judge that driving motor withdraws and is obstructed, the controller passes through motor operation control module control driving motor and stops to withdraw headrest mechanism to can prevent that headrest mechanism from continuing to withdraw, cause the possibility of pressing from both sides the wound accident.
Specifically, the controlling the drive motor to stop retracting the headrest mechanism includes: and controlling the driving motor to stop running or controlling the driving motor to reversely rotate to open the headrest mechanism.
Example 2:
as shown in fig. 5, embodiment 2 of the present invention is different from embodiment 1 in that the electric headrest apparatus further includes an alarm 44, the alarm 44 is connected to the controller 41, and the alarm 44 is configured to give an alarm before controlling the driving motor 3 to stop operating.
In practical application, the working process of the anti-pinch electric headrest device is that after a retraction button of the headrest is pressed, the driving motor 3 is started to begin to retract the headrest. If the retracting working current acquired by the current sampling module 43 in real time in the retracting process is less than the anti-pinch current, the headrest mechanism is smoothly retracted. If the current sampling module 43 collects the withdrawing working current which is greater than or equal to the anti-pinch current in the withdrawing process, the alarm 44 gives an alarm, and the controller 41 controls the driving motor 3 to stop running immediately through the motor running control module 42. When the blocking is released, the drive motor 3 is restarted to continue the retracting action until the headrest mechanism is retracted to the initial position.
The control method of the anti-pinch electric headrest device provided by the embodiment of the invention has the advantages that the working current of the driving motor after the preset starting time is obtained as the normal working current at the beginning of each withdrawing operation, namely the normal working current is changed according to the performance of the driving motor, and the self-learning function is realized, so that the accurate normal working current can be provided every time the driving motor operates, 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.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (13)
1. The anti-pinch electric headrest device is characterized by comprising a headrest mechanism (1), a backrest mechanism (2), a driving motor (3) and a control mechanism (4), wherein the headrest mechanism (1) is rotatably connected with the backrest mechanism (2), the headrest mechanism (1) comprises a connecting rod (12) and a linkage piece (13), one end of the linkage piece (13) is connected with the connecting rod (12), and the middle part of the connecting rod (12) is connected with a motor push rod (31) through a first connecting piece (14);
the control mechanism (4) is connected with the driving motor (3), and the control mechanism (4) comprises a controller (41), a motor operation control module (42) and a current sampling module (43) which are sequentially connected;
the current sampling module (43) is used for sampling the current information of the driving motor (3) in real time;
the controller (41) is used for controlling the driving motor (3) to drive the motor push rod (31) to move through the motor operation control module (42) so as to drive the headrest mechanism (1) to be unfolded or folded in the backrest mechanism (2); the controller (41) is used for receiving the current information of the current sampling module (43), and judging whether the withdrawing working current of the driving motor (3) is larger than or equal to the anti-pinch current or not in the process that the driving motor (3) withdraws the headrest mechanism (1);
withdraw operating current more than or equal to when preventing pressing from both sides the electric current, controller (41) are passed through motor operation control module (42) control driving motor (3) stops to withdraw headrest mechanism (1), wherein, prevent pressing from both sides the electric current and do the normal operating current of driving motor (3) and predetermine resistance ripple current add, normal operating current is for withdrawing the operation at every turn and begins driving motor (3) starts the operating current who gathers after the preset time, predetermine resistance ripple current and do driving motor receives to predetermine the ripple current value of preventing pressing from both sides after the resistance and gathering.
2. The head device of claim 1, wherein the motor operation control module (42) is a power driving module, and the motor operation control module (42) is configured to receive a control signal from the control mechanism (4) and control the driving motor (3).
3. The anti-pinch electric headrest device according to claim 1, wherein one end of the controller (41) is connected to a power source (40), and the other end of the controller (41) is connected to the motor operation control module (42) and the current sampling module (43), respectively.
4. The electric headrest device for preventing pinch injury of claim 1, further comprising an alarm (44), wherein the alarm (44) is connected to the controller (41), and the alarm (44) is used for alarming before controlling the driving motor (3) to stop running.
5. The anti-pinch electric headrest device according to claim 1, wherein the headrest mechanism (1) further comprises a headrest frame (11), and the headrest frame (11) is fixedly connected with the linkage member (13).
6. An anti-pinch powered headrest arrangement according to claim 1, wherein the backrest mechanism (2) includes a backrest frame (21) and a backrest frame attachment assembly (22), the backrest frame (21) being fixedly connected to the backrest frame attachment assembly (22).
7. The electric headrest device for preventing pinching of injury as claimed in claim 5, wherein said backrest frame connecting assembly (22) comprises a fixing rod (221) and two fixing members (222), two of said fixing members (222) are disposed opposite to each other, said fixing rod (221) is disposed between two of said fixing members (222), one end of each of said fixing members (222) is connected to said linking member (13), and the other end is connected to said fixing rod (221).
8. The electric headrest device for preventing pinching, according to claim 6, wherein said linkage member (13) is rotatably connected to said fixing member (222).
9. The electric headrest device for preventing pinching injury of claim 6, wherein a second connecting member (15) is disposed in the middle of the fixing rod (221), one end of the driving motor (3) is connected to the fixing rod (221) through the second connecting member (15), and the other end of the driving motor (3) is connected to the connecting rod (12) through a motor push rod (31) and a first connecting member (14).
10. The anti-pinch electric headrest device according to claim 9, characterized in that the first connecting piece (14) is rotatably connected with the motor push rod (31) through a rotating shaft, the rotating shaft is a pin or a rotating bolt, the second connecting piece (15) is rotatably connected with one end of the driving motor (3) through a rotating shaft, and the rotating shaft is a pin or a rotating bolt.
11. A control method of an anti-pinch electric headrest device, characterized in that the control method is configured in the anti-pinch electric headrest device of any one of claims 1 to 10, the electric headrest device comprises a headrest mechanism (1), a backrest mechanism (2), a driving motor (3) and a control mechanism (4), the headrest mechanism (1) is rotatably connected with the backrest mechanism (2), and the control mechanism (4) is used for controlling the driving motor (3) to drive the headrest mechanism (1) to rotate relative to the backrest mechanism (2); the method comprises the following steps:
receiving a retracting instruction of the headrest mechanism, and starting a driving motor for retracting the headrest mechanism;
obtain driving motor's normal operating current and predetermine resistance ripple current, include: acquiring a working current after the driving motor starts for a preset time after each withdrawing operation is started, taking the working current after the preset time as the normal working current, wherein the preset resistance ripple current is a ripple current value acquired after the driving motor receives preset anti-pinch resistance;
setting an anti-pinch current, wherein the anti-pinch current is the sum of the normal working current of the driving motor and a preset resistance ripple current;
sampling the retracting working current of the driving motor in real time in the process of retracting the headrest mechanism;
judging whether the withdrawing working current of the driving motor is larger than or equal to the anti-pinch current or not;
if yes, the drive motor is controlled to stop withdrawing the headrest mechanism.
12. The method as claimed in claim 11, wherein the predetermined time is 60-120 ms.
13. The method of claim 11, wherein controlling the drive motor to stop retracting the headrest mechanism comprises: and controlling the driving motor to stop running or controlling the driving motor to open the headrest mechanism.
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|---|---|---|---|
| CN201910168621.3A CN110074590B (en) | 2019-03-06 | 2019-03-06 | Anti-pinch electric headrest device and control method thereof |
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| CN201910168621.3A CN110074590B (en) | 2019-03-06 | 2019-03-06 | Anti-pinch electric headrest device and control method thereof |
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| CN110074590B true CN110074590B (en) | 2022-06-24 |
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