CN215829024U

CN215829024U - Electronic knee rest device and sewing machine with same

Info

Publication number: CN215829024U
Application number: CN202121201676.9U
Authority: CN
Inventors: 颜慧军
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Zhejiang Maqi Sewing Machine Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-02-15
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to the technical field of sewing machines, and discloses an electronic knee backrest device and a sewing machine with the same. The knee back cushion is linked with the swinging block through the connecting rod, the induction plate is matched with the electromagnetic inductor under the driving of the swinging block to change the magnetic flux in the electromagnetic inductor and generate an electric signal, and the control system of the sewing machine controls the lifting of the lifting foot according to the signal. The control and operation mode of the presser foot lifting is simplified, and the control structure is simplified.

Description

Electronic knee rest device and sewing machine with same

Technical Field

The utility model relates to the technical field of sewing machines, in particular to an electronic knee rest device and a sewing machine with the same.

Background

Each time a length of sewing is completed, the worker may need to lift the presser foot to adjust the cloth or complete the process. The pressure foot lifting in the current market is mainly realized through two modes, one mode is an artificial knee rest, and the other mode is pedal back stepping. Generally, the pedal is backwardly stepped by an automatic presser foot lifting mechanism in the machine, the lifting speed and the lifting height are preset, the presser foot lifting height of the knee rest is determined according to the knee-up degree of the knee rest, and the presser foot lifting is performed by overcoming the pressure of the presser foot by a worker. Skilled workers often prefer to use a knee rest to lift the presser foot, but this is certainly more tiring than lifting the presser foot with a foot pedal.

Along with the rising of the action of lifting the presser foot controlled by the stepping motor, the electronic knee rest device becomes a new mechanism. The electronic knee rest can realize different lifting heights by controlling the stepping motor through the control system according to the stroke change, and can save much labor because workers do not need to overcome resistance by themselves. For example, the chinese utility model 201621131530.0 discloses a knee rest sensor, which comprises a knee rest disc, a connecting rod, a fixing seat, a swing link assembly and a sensor assembly; the knee leaning disc is connected with the fixed seat through a connecting rod, and the position and the height of the knee leaning disc on the connecting rod can be adjusted; the fixed seat is connected with the swing rod assembly through a screw, and the installation angle of the fixed seat can be adjusted; the swing rod assembly penetrates through the shell to be connected with the magnet assembly, and a limiting stop is arranged on the shell to limit the angle of the swing rod assembly; the sensor assembly is provided with a shell and a bracket, the magnet assembly and a circuit board are arranged in the shell, and the circuit board is provided with a Hall sensor; and a spring is arranged outside the shell. In the above patent, the control of the presser foot lifting is realized by the magnet and the hall sensor, but the above structure is complicated and the use stability is low. Due to poor interchangeability of the Hall sensor, signals change along with temperature, nonlinear output is easy to influence the control of a sewing machine control system on the presser foot lifting.

Disclosure of Invention

The present invention has been made in view of the above-mentioned disadvantages of the prior art, and provides an electronic knee rest device and a sewing machine having the same.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

the utility model provides an electron knee is by device, includes the knee cushion, swing piece and connect the connecting rod between knee cushion and swing piece, the knee cushion is connected in the lower extreme of connecting rod, the upper end of connecting rod is buckled and is connected with swing piece, still including installing the installing support on sewing machine and installing the electromagnetic induction ware on the installing support, swing piece rotationally sets up on the installing support, be equipped with on the swing piece with the synchronous wobbling tablet of swing piece, the one end of tablet is movably worn to locate in the electromagnetic induction ware.

Preferably, one side of the mounting bracket is provided with a fixing bracket for fixed mounting, the electromagnetic inductor is obliquely arranged on the fixing bracket, the upper end of the induction plate is bent towards one side to form an induction part, and the induction part is movably arranged in the electromagnetic inductor in a penetrating way.

Preferably, the lower end of the fixing support is bent towards a direction away from the mounting support to form a bent part, one end of the bent part away from the sensing plate is bent upwards to form a tension spring seat, and the tension spring seat is connected with the upper end of the sensing plate through a tension spring.

Preferably, the kink is equipped with the blotter near an pot head of tablet, and when the response position was located inside the electromagnetic inductor, the upper end and the blotter counterbalance of tablet.

Preferably, the device further comprises a shaft position screw, the shaft position screw penetrates through the upper end of the swinging block and the lower end of the induction plate and is connected with the mounting bracket, and the swinging block and the induction plate can rotate relatively.

Preferably, the lower end of the induction plate is provided with a strip-shaped groove, the strip-shaped groove is positioned below the shaft position screw, and the swinging block is provided with a limit screw penetrating through the strip-shaped groove.

A sewing machine comprises the electronic knee rest device.

Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that:

1. the knee back cushion is linked with the swinging block through the connecting rod, the induction plate is matched with the electromagnetic inductor under the driving of the swinging block to change the magnetic flux in the electromagnetic inductor and generate an electric signal, and the control system of the sewing machine controls the lifting of the lifting foot according to the signal. The control and operation mode of the presser foot lifting is simplified, and the control structure is simplified.

2. The kink on the fixed bolster sets up the extension spring seat and fixes the one end of extension spring, and the other end and the tablet of extension spring are connected and exert reset force to it after the tablet swing, the reset of the tablet of being convenient for.

3. The strip-shaped groove on the sensing plate is matched with the limit screw on the swinging block to limit the relative rotating stroke of the sensing plate and the swinging block, so that the position of the sensing plate can not be changed after a worker adjusts the position of the knee back cushion according to own habits. The stability of control to the tablet is improved.

Drawings

Figure 1 is a perspective view of a knee rest apparatus according to the present invention.

Figure 2 is a front view of the knee rest apparatus of the present invention.

Fig. 3 is a perspective view of the fixing bracket.

Fig. 4 is a perspective view of the fixing bracket.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-knee back cushion, 2-swing block, 3-connecting rod, 4-installing support, 5-electromagnetic inductor, 6-induction plate, 7-fixed bolster, 8-induction part, 9-kink, 10-extension spring seat, 11-extension spring, 12-blotter, 13-axle position screw, 14-bar groove, 15-stop screw.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

The utility model provides an electron knee is by device, as shown in fig. 1 to 4, including knee cushion 1, swing piece 2 and connect in knee cushion 1 and swing connecting rod 3 between piece 2, knee cushion 1 connects in the lower extreme of connecting rod 3, the upper end of connecting rod 3 is buckled and is connected with swing piece 2, still including installing the installing support 4 on the sewing machine and installing the electromagnetic induction ware 5 on installing support 4, swing piece 2 rotationally sets up on installing support 4, be equipped with on swing piece 2 with swing piece 2 synchronous swing's tablet 6, the movably electromagnetic induction ware 5 of locating of one end of tablet 6 is worn to locate. The mounting support 4 is mounted at the bottom of a sewing machine table, the knee back cushion 1 is located on the side portion of a knee of a worker, the worker applies acting force by utilizing the knee after sewing is finished, the knee back cushion 1 drives the swing block 2 to swing through the connecting rod 3, the swing block 2 drives the induction plate 6 to swing to cut magnetic induction lines in the electromagnetic inductor 5 and generate electric signals, the electromagnetic inductor 5 transmits the electric signals to the control system, and the control system controls the lifting and pressing foot of the sewing machine to be lifted according to the signals. The induction plate 6 and the electromagnetic inductor 5 are matched to serve as a control signal for lifting the presser foot, so that a control system of the sewing machine can automatically lift the presser foot of the sewing machine after sewing is finished by using the signal, and the control and operation modes for lifting the presser foot are simplified.

One side of installing support 4 is equipped with fixed mounting's fixed bolster 7, and electromagnetic inductor 5 inclines to set up on fixed bolster 7, and the upper end of tablet 6 is to one side bending type formation response portion 8, and response portion 8 is movably worn to locate in electromagnetic inductor 5. Electromagnetic inductor 5 passes through fixed bolster 7 slope and installs on installing support 4, and tablet 6 drives induction portion 8 and rotates and advance at electromagnetic inductor 5, reduces induction portion 8 and the risk of rubbing with electromagnetic inductor 5 and bumping.

The lower extreme of fixed bolster 7 is to the direction of keeping away from installing support 4 bending type 9, and the one end that the tablet 6 was kept away from to kink 9 upwards bending type 10 that forms, connects through extension spring 11 between extension spring seat 10 and the upper end of tablet 6. The extension spring seat 10 is arranged on the bending part 9 of the fixed support 7 and fixes one end of the extension spring 11, the other end of the extension spring 11 is connected with the induction plate 6, the induction plate 6 is convenient to reset after swinging, and the resetting stability and the resetting precision of the induction plate 6 are improved.

One end cover that kink 9 is close to tablet 6 is equipped with blotter 12, and when induction portion 8 was located inside electromagnetic inductor 5, the upper end of tablet 6 offseted with blotter 12. When the induction plate 6 is reset, the impact of the induction plate 6 on the bending part 9 of the fixing bracket 7 is relieved through the buffer pad 12.

Example 2

An electronic knee rest device, as shown in fig. 1 to 4, further includes a shaft screw 13 on the basis of embodiment 1, the shaft screw 13 is inserted through the upper end of a swing block 2 and the lower end of a sensing plate 6 and connected with a mounting bracket 4, and the swing block 2 and the sensing plate 6 can rotate relatively. Shaft position screw 13 is used for mounting oscillating block 2 and induction plate 6 on mounting bracket 4, and making oscillating rod and induction plate 6 be rotatable on mounting bracket 4 so as to raise stability of oscillating bracket and induction plate 6.

A strip-shaped groove 14 is formed in the lower end of the induction plate 6, the strip-shaped groove 14 is located below the shaft position screw 13, and a limiting screw 15 penetrating through the strip-shaped groove 14 is arranged on the swinging block 2. The strip-shaped groove 14 and the limit screw 15 limit the relative rotation stroke of the swing block 2 and the induction plate 6, so that a user can conveniently adjust the position of the knee back cushion 1 according to own habits, and simultaneously the initial position of the induction plate 6 is kept unchanged, thereby keeping the stability of the magnetic induction signal of the electromagnetic inductor 5 and facilitating the control of the sewing machine on the pressure lifting foot.

Example 3

A sewing machine, as shown in fig. 1 to 4, comprising an electronic knee rest device as described above.

The principle of the utility model is as follows: after the fabric is sewn, a worker supports knees on the knee back cushion 1 and applies pressure to the knee back cushion 1, so that the knee back cushion 1 drives the swinging block 2 to rotate anticlockwise through the connecting rod 3, the induction plate 6 and the induction part 8 on the induction plate 6 rotate anticlockwise synchronously with the swinging block 2, the induction part 8 is separated from the electromagnetic inductor 5, and the magnetic flux in the electromagnetic inductor 5 changes. At this time, the electromagnetic sensor 5 transmits an electric signal to a control system of the sewing machine, and the control system controls the lifting of the presser foot according to the signal.

Claims

1. The utility model provides an electron knee is by device, includes knee cushion (1), swing piece (2) and connects connecting rod (3) between knee cushion (1) and swing piece (2), and knee cushion (1) is connected in the lower extreme of connecting rod (3), and the upper end of connecting rod (3) is buckled and is connected its characterized in that with swing piece (2): the sewing machine is characterized by further comprising a mounting bracket (4) mounted on the sewing machine and an electromagnetic inductor (5) mounted on the mounting bracket (4), the swinging block (2) is rotatably arranged on the mounting bracket (4), an induction plate (6) synchronously swinging with the swinging block (2) is arranged on the swinging block (2), and one end of the induction plate (6) is movably arranged in the electromagnetic inductor (5) in a penetrating mode.

2. An electronic knee rest device according to claim 1, wherein: one side of the mounting bracket (4) is provided with a fixed bracket (7) which is fixedly mounted, the electromagnetic inductor (5) is obliquely arranged on the fixed bracket (7), the upper end of the induction plate (6) is bent towards one side to form an induction part (8), and the induction part (8) is movably arranged in the electromagnetic inductor (5) in a penetrating way.

3. An electronic knee-rest device according to claim 2, wherein: the lower end of the fixed support (7) is bent towards the direction far away from the mounting support (4) to form a bent part (9), one end, far away from the induction plate (6), of the bent part (9) is bent upwards to form a tension spring seat (10), and the tension spring seat (10) is connected with the upper end of the induction plate (6) through a tension spring (11).

4. An electronic knee rest device according to claim 3, wherein: one end of the bending part (9) close to the induction plate (6) is sleeved with a cushion pad (12), and when the induction part (8) is positioned inside the electromagnetic inductor (5), the upper end of the induction plate (6) is abutted against the cushion pad (12).

5. An electronic knee rest device according to claim 1, 2, 3 or 4, wherein: the swing block is characterized by further comprising an axial position screw (13), the axial position screw (13) penetrates through the upper end of the swing block (2) and the lower end of the induction plate (6) and is connected with the mounting bracket (4), and the swing block (2) and the induction plate (6) can rotate relatively.

6. An electronic knee-rest device according to claim 5, wherein: a strip-shaped groove (14) is formed in the lower end of the induction plate (6), the strip-shaped groove (14) is located below the shaft position screw (13), and a limiting screw (15) penetrating through the strip-shaped groove (14) is arranged on the swinging block (2).

7. A sewing machine characterized by: an electronic knee rest device comprising any one of claims 1 to 6.