CN213061307U

CN213061307U - Electronic knee rest device and sewing machine

Info

Publication number: CN213061307U
Application number: CN202021523617.9U
Authority: CN
Inventors: 邱丽; 管建平; 潘建国; 于恒基
Original assignee: Jack Sewing Machine Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-04-27
Anticipated expiration: 2030-07-28

Abstract

The utility model provides an electron knee is by device and sewing machine, electron knee by the device include the installing support, be fixed in the fixed axle of installing support, rotationally install in turning block, inductive pick-up of fixed axle, by response piece, connecting rod and knee by the dish, inductive pick-up with by response piece respectively fixed mounting in installing support and turning block, the both ends of connecting rod are fixed mutually with turning block and knee by the dish respectively. In this application, the knee is by the dish and directly link to each other, the direct drive turning block rotates with the turning block through the connecting rod, and then drives fixed mounting in the inductive pick-up of turning block or is rotated by the response piece together, makes inductive pick-up's output signal change, realizes from this that the knee is by lifting the presser foot. Therefore, in the application, the fixed shaft is fixedly arranged on the mounting bracket, the fixed shaft is fixed, the rotating block rotates relative to the fixed shaft, only the requirement on the precision of the fixed shaft is required, the machining difficulty of the outer circle of the fixed shaft is low, and the machining precision requirement on the mounting bracket is reduced.

Description

Electronic knee rest device and sewing machine

Technical Field

The utility model relates to a sewing machine especially relates to an electron knee is by device.

Background

At present, some sewing machines will be equipped with electronic knee rest devices for realizing that the knee is by the height that the presser foot was lifted in the range control of swing, for example the presser foot mechanism is lifted to the induction type of a sewing machine that chinese utility model patent application No. 201520380341.6 discloses. The induction type presser foot lifting mechanism comprises a frame body, a rotating shaft arranged in the frame body, a swinging assembly driving the rotating shaft to rotate, an induction block arranged on the rotating shaft and an induction box arranged on the frame body, wherein the swinging assembly comprises a connecting block arranged at the outer end of the rotating shaft, a leaning rod is arranged on the connecting block, and a cushion block capable of pressing and rotating the rotating shaft is arranged at the outer end of the leaning rod; when the presser foot is lifted by the knee leaning control, a user pushes the cushion block by the knee, the cushion block drives the rotating shaft to rotate through the leaning rod and the connecting block, the rotating shaft drives the sensing block to rotate together, the output signal of the sensing box changes, the electric control module of the sewing machine controls the action of the presser foot driving source, and the presser foot is lifted upwards.

However, in the above-mentioned electronic knee-rest device, the rotating shaft is installed on the frame body and rotates relatively, which has a high requirement on the processing precision of the frame body, for example, the inductive presser foot lifting mechanism of the sewing machine disclosed in the chinese utility model with the application number of 201520380341.6 shows that the frame body is an oil pan, then the rotating shaft is installed at the lower end of the oil pan, two lugs need to be arranged at the lower end of the oil pan, and the mounting hole for supporting the rotating shaft between the two lugs is required to be concentric and smooth, so the processing requirement on the frame body is high.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, the to-be-solved technical problem of the present invention is to provide an electronic knee leaning device, which is convenient to install and can reduce the requirement for the processing precision of the frame body.

In order to achieve the above object, the utility model provides an electron knee is by device, including the installing support, be fixed in the fixed axle of installing support, rotationally install in turning block, inductive pick-up of fixed axle, by response piece, connecting rod and knee by the dish, inductive pick-up with by response piece difference fixed mounting in installing support and turning block, the both ends of connecting rod are fixed mutually with turning block and knee by the dish respectively.

Further, the electron knee leans on the device still to establish the torsional spring at the fixed epaxial including the cover, the both ends of torsional spring link to each other with installing support and turning block respectively, be equipped with the first spacing portion of two relative settings on the installing support, be equipped with the spacing portion of second that is located between two first spacing portions on the turning block, the torsional spring makes the spacing portion of second and the cooperation of the first spacing portion butt in two first spacing portions.

Further, the electron knee leans on the device still includes the retaining ring, the fixed axle is a step axle, and this step axle is including consecutive first axial region and second axial region and form the shaft shoulder portion of department of linking to each other at first axial region and second axial region, the diameter of first axial region is greater than the diameter of second axial region, first axial region is fixed mutually with the installing support, the retaining ring is fixed on the second axial region, the turning block rotationally overlaps establishes on the second axial region, and the both ends of turning block respectively with retaining ring and shaft shoulder portion butt cooperation.

Furthermore, the electronic knee-rest device further comprises a housing fixed on the mounting bracket, the induction sensor is fixed inside the housing, and the inducted part is fixed in the rotating block.

Preferably, the sensed member is a magnet, and the sensing sensor is a hall sensor.

The utility model also provides a sewing machine, including electrical control module, presser foot, lift presser foot mechanism and as above that link to each other with the presser foot the electron knee lean on the device, lift and have in the presser foot mechanism and lift the presser foot driving source, inductive transducer with lift the presser foot driving source and all link to each other with electrical control module.

As described above, the electronic knee rest device and the sewing machine according to the present invention have the following advantageous effects:

in this application, the knee is leaned on the dish and is passed through the connecting rod and directly link to each other with the turning block, direct drive turning block rotates for the fixed axle, and then drives fixed mounting in the inductive pick-up of turning block or is rotated by the response piece together, makes inductive pick-up's output signal change, realizes from this that the knee leans on lifting the presser foot. Therefore, in the application, the fixed shaft is fixedly arranged on the mounting bracket, the fixed shaft is fixed, the rotating block rotates relative to the fixed shaft, only the requirement on the precision of the fixed shaft is required, the machining difficulty of the outer circle of the fixed shaft is low, and the machining precision requirement on the mounting bracket is reduced.

Drawings

Fig. 1 and 2 are schematic structural views of an electronic knee-rest device in different viewing angles according to the present application.

Figure 3 is an exploded view of figure 2 with the linkage and knee rest pan omitted.

Description of the element reference numerals

10 mounting bracket

11 first limit part

20 fixed shaft

21 first shaft part

22 second shaft part

23 shaft shoulder

30 turning block

31 second stopper

40 inductive sensor

50 by the response piece

60 connecting rod

70 knee leaning tray

80 torsion spring

90 check ring

110 casing

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be considered as the scope of the present invention without substantial changes in the technical content.

The utility model provides a sewing machine, which comprises an electric control module, a presser foot lifting mechanism connected with the presser foot, and an electronic knee leaning device, wherein the presser foot lifting mechanism is provided with a presser foot lifting driving source; as shown in fig. 1 to 3, the electronic knee backrest device includes a mounting bracket 10, a fixed shaft 20 fixed to the mounting bracket 10, a rotating block 30 rotatably mounted on the fixed shaft 20, an inductive sensor 40, an induced piece 50, a connecting rod 60, and a knee backrest plate 70, wherein the inductive sensor 40 and the induced piece 50 are respectively fixedly mounted on the mounting bracket 10 and the rotating block 30, and the upper and lower ends of the connecting rod 60 are respectively fixed to the rotating block 30 and the knee backrest plate 70; the presser foot lifting driving source in the presser foot lifting mechanism and the inductive sensor 40 in the electronic knee leaning device are connected with the electronic control module. For convenience of description, the axial direction of the fixed shaft 20 is defined as the front-rear direction.

When the sewing machine works, if a user needs to lift the presser foot by the knee, the knee of the user abuts against the knee leaning disc 70 in the electronic knee leaning device and pushes the knee leaning disc 70, the knee leaning disc 70 directly drives the rotating block 30 to rotate around the fixed shaft 20 through the connecting rod 60, the rotating block 30 drives the induction sensor 40 fixedly arranged on the rotating block 30 or the inducted piece 50 to rotate together, the output signal of the induction sensor 40 changes, the electronic control module sends an instruction to the presser foot lifting driving source, the presser foot lifting driving source acts, the presser foot is driven to lift upwards through the presser foot lifting mechanism, and therefore the purpose that the knee leans on the presser foot is achieved. In the electronic knee rest device related to the present application, knee rest disc 70 directly links to each other with turning block 30 through connecting rod 60, direct drive turning block 30 rotates, fixed axle 20 and installing support 10 are fixed relation, can not rotate relatively between the two, compare in prior art, fixed axle 20 fixed mounting is on installing support 10 in this application, fixed axle 20 is fixed motionless, and turning block 30 rotates for fixed axle 20, only need have the requirement to the precision of fixed axle 20, and the excircle processing degree of difficulty of fixed axle 20 is low, thereby reduce the processing precision requirement to installing support 10. Simultaneously, this application has still promoted sewing machine's degree of automation, makes sewing machine more intelligent.

Preferably, the presser foot lifting drive source in the presser foot lifting mechanism can be an electromagnet or a motor, and the presser foot lifting drive source is preferably a motor, so that collision is avoided in the presser foot lifting process, and noise is reduced. The inductive sensor 40 and the sensed piece 50 are fixed in two ways: in the first mode, the induction sensor 40 is fixedly arranged on the mounting bracket 10, and the inducted piece 50 is fixedly arranged on the rotating block 30; in the second mode, the induction sensor 40 is fixedly arranged on the rotating block 30, and the inducted piece 50 is fixedly arranged on the mounting bracket 10; in this embodiment, the first method is preferably adopted. In addition, as shown in fig. 1 to 3, the electronic knee rest device further includes a cover 110 fixed to the mounting bracket 10, and the induction sensor 40 is fixed inside the cover 110, thereby fixedly mounting the induction sensor 40 to the mounting bracket 10; the sensed member 50 is directly fixed in the rotating block 30, and the housing 110, the sensing sensor 40 and the sensed member 50 constitute a sensor assembly. Preferably, the sensed member 50 is a magnet and the inductive sensor 40 is a hall sensor.

Further, as shown in fig. 1 to 3, the electronic knee rest device further includes a retainer ring 90, the fixing shaft 20 is a stepped shaft, the stepped shaft includes a first shaft portion 21 and a second shaft portion 22 connected in sequence, and a shaft shoulder portion 23 formed at a connection position of the first shaft portion 21 and the second shaft portion 22, a diameter of the first shaft portion 21 is larger than a diameter of the second shaft portion 22, a front end of the first shaft portion 21 is fixed to the mounting bracket 10, the retainer ring 90 is fixed to a rear end of the second shaft portion 22, the rotating block 30 is rotatably sleeved on the second shaft portion 22, and front and rear ends of the rotating block 30 are respectively abutted and matched with the retainer ring 90 and the shaft shoulder portion 23, so that the retainer ring 90 and the shaft shoulder portion 23 form an axial limit for the rotating block 30, and the rotating block 30 is prevented from moving in an axial direction of the fixing shaft 20.

Further, as shown in fig. 1 to 3, the electronic knee rest device further includes a torsion spring 80, the torsion spring 80 is sleeved on the first shaft portion 21 of the fixing shaft 20, one end of the torsion spring 80 is fixed in the hole of the mounting bracket 10, and the other end of the torsion spring 80 is fixed in the groove of the rotating block 30. The lower end of the mounting bracket 10 is provided with two first limiting parts 11 which are oppositely arranged left and right and protrude backwards, the lower end of the rotating block 30 is provided with a second limiting part 31 protruding forwards, and the second limiting part 31 is positioned between the two first limiting parts 11. When the user does not need to lift the presser foot by the knee, the user does not push the knee disc 70, and the electronic knee rest device is in a non-working state, and in this state, the torsion spring 80 enables the second limit part 31 to be in abutting fit with the left first limit part 11. When the user needs to lift the presser foot by the knee, the knee of the user pushes the knee disc 70 rightwards, the electronic knee device is in a working state, and in the working state, the knee disc 70 drives the rotating block 30 to swing rightwards through the connecting rod 60 until the second limiting part 31 is in butt fit with the first right limiting part 11. After the knee is lifted by the foot, the knee of the user is separated from the knee rest disc 70, and the rotating block 30 swings leftwards under the action of the torsion spring 80 until the second limiting part 31 is in butt fit with the first limiting part 11 on the left side. Therefore, the two first limiting portions 11 of the mounting bracket 10 and the one second limiting portion 31 of the rotating block 30 cooperate with each other to limit the rotating range of the rotating block 30, and the rotating block 30 swings within the range limited by the two first limiting portions 11 of the mounting bracket 10 with the fixed shaft 20 as a fulcrum.

Preferably, the fixing position of the knee rest disc 70 on the connecting rod 60 is adjustable, and the fixing position of the rotating block 30 on the connecting rod 60 is also adjustable, so that the personalized use requirements of users can be met, and the knee rest comfort level is improved.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An electronic knee rest device, comprising: including installing support (10), be fixed in fixed axle (20) of installing support (10), rotationally install turning block (30), inductive transducer (40) in fixed axle (20), by inductive member (50), connecting rod (60) and knee rest dish (70), inductive transducer (40) with by inductive member (50) respectively fixed mounting in installing support (10) and turning block (30), the both ends of connecting rod (60) are fixed mutually with turning block (30) and knee rest dish (70) respectively.

2. The electronic knee rest device of claim 1, wherein: still establish torsional spring (80) on fixed axle (20) including the cover, the both ends of torsional spring (80) link to each other with installing support (10) and turning block (30) respectively, be equipped with first spacing portion (11) of two relative settings on installing support (10), be equipped with spacing portion (31) of second that are located between two first spacing portions (11) on turning block (30), torsional spring (80) make spacing portion (31) of second and the cooperation of first spacing portion (11) butt in two first spacing portions (11).

3. The electronic knee rest device of claim 1, wherein: still include retaining ring (90), fixed axle (20) are a ladder axle, and this ladder axle is including consecutive first axial region (21) and second axial region (22) and form at first axial region (21) and second axial region (22) axle shoulder (23) of department that links to each other, the diameter of first axial region (21) is greater than the diameter of second axial region (22), first axial region (21) is fixed mutually with installing support (10), retaining ring (90) are fixed on second axial region (22), turning block (30) rotationally overlap establish on second axial region (22) and the both ends of turning block (30) respectively with retaining ring (90) and axle shoulder (23) butt cooperation.

4. The electronic knee rest device of claim 1, wherein: the induction type rotating block further comprises a cover shell (110) fixed on the mounting support (10), the induction sensor (40) is fixed inside the cover shell (110), and the inducted piece (50) is fixed in the rotating block (30).

5. The electronic knee-rest device of claim 1 or 4, wherein: the sensed piece (50) is a magnet, and the sensing sensor (40) is a Hall sensor.

6. A sewing machine comprises an electric control module, a presser foot and a presser foot lifting mechanism connected with the presser foot, wherein the presser foot lifting mechanism is internally provided with a presser foot lifting driving source, and the sewing machine is characterized in that: further comprising the electronic knee rest device of any one of claims 1-5, wherein the inductive sensor (40) and the presser foot lift drive source are connected to an electronic control module.