A needle-lifting mechanism for a sewing machine

Abstract

The utility model relates to sewing machine technical field discloses a sewing machine's lift tooth mechanism, including feeding connecting rod, the tooth frame is rotatably installed on the feeding connecting rod, the sliding block is fixedly connected on the tooth frame, the outside of sliding block is connected with the lift tooth forked crank of sliding, still include: the protective cover of installation in the outside of tooth frame, the protective assembly that avoids sundries to fall between tooth frame and protective cover and influences normal work of tooth frame is fixedly connected on the lift tooth forked crank, the utility model tooth frame moves through the sliding block and drives the lift tooth forked crank to move up and down, the lift tooth forked crank can drive the protective assembly to lift in the inside of protective cover, when the tooth frame rises, the lift tooth forked crank drives the synchronous rise of protective assembly, fills the gap between protective cover and tooth frame, can effectively prevent the impurity such as cotton flock from falling into the inside of sewing machine from protective cover and influence normal use of sewing machine.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a sewing machine tooth-lifting mechanism. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the fabric, so that one or more layers of fabric are interwoven or sewn together. Generally, a sewing machine consists of four parts: the machine head, the machine base, the transmission, and accessories. The transmission part consists of components such as the frame, transmission parts, hand crank or electric motor.

[0003] After a period of use, dust and debris tend to accumulate on the upper surface of the feed dog plate of existing sewing machines. This dust and debris fills the gap between the upper surface of the feed dog plate and the lower surface of the sewing machine worktable. If not cleaned in time, this dust and debris will accumulate more and more, which will not only affect the normal use of the feed dog plate, but also affect the use of the sewing machine after falling into the machine. Utility Model Content

[0004] The purpose of this invention is to provide a tooth-lifting mechanism for a sewing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tooth-lifting mechanism for a sewing machine, comprising a feeding link, a tooth holder rotatably mounted on the feeding link, a sliding block fixedly connected to the tooth holder, and a tooth-lifting fork-shaped crank slidably connected to the outer side of the sliding block, further comprising:

[0006] A protective cover is installed on the outside of the dental frame, and a protective component is fixedly connected to the lifting fork-shaped crank to prevent debris from falling between the dental frame and the protective cover and affecting the normal operation of the dental frame.

[0007] Preferably, the protective component includes a connecting rod fixedly connected to the top of the lifting fork crank, and a connecting cover is fixedly connected to the end of the connecting rod away from the lifting fork crank.

[0008] Preferably, the connecting cover is installed inside the protective cover and slides inside the protective cover.

[0009] Preferably, a rubber ring is fixedly connected to the inner ring of the connecting cover.

[0010] Preferably, a limiting rod is fixedly connected to the outer side of the connecting cover, and a limiting sleeve is fixedly connected to the bottom of the protective cover, with the limiting rod sliding inside the limiting sleeve.

[0011] Preferably, the limiting sleeve is obliquely and fixedly installed at the bottom of the protective cover.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] When the sewing machine is moved, the sliding block drives the lifting fork-shaped crank to move up and down. The lifting fork-shaped crank can drive the protective component to rise and fall inside the protective cover. When the sewing machine rises, the lifting fork-shaped crank drives the protective component to rise synchronously, filling the gap between the protective cover and the sewing machine. This can effectively prevent impurities such as cotton wool from falling from the protective cover into the sewing machine and affecting the normal use of the sewing machine. Attached Figure Description

[0014] Figure 1 A schematic diagram of the lifting mechanism of the sewing machine provided by this utility model;

[0015] Figure 2 A schematic diagram of the connection structure between the tooth frame and the tooth lifting fork-shaped crank provided by this utility model;

[0016] Figure 3 A schematic diagram of the protective component structure provided by this utility model;

[0017] Figure 4 A schematic diagram of the connection structure between the connecting cover and the limiting rod provided by this utility model;

[0018] Figure 5 Schematic diagram of the protective cover and limiting sleeve provided by this utility model;

[0019] Figure 6 A schematic diagram of the protective cover and connecting cover provided by this utility model.

[0020] In the diagram: 1. Feeding connecting rod; 2. Tooth bracket; 3. Sliding block; 4. Tooth lifting fork-shaped crank; 5. Protective cover; 6. Protective component; 601. Connecting rod; 602. Connecting cover; 7. Rubber ring; 8. Limiting rod; 9. Limiting sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-6As shown, a tooth-lifting mechanism for a sewing machine includes a feeding link 1, a tooth holder 2 rotatably mounted on the feeding link 1, a sliding block 3 fixedly connected to the tooth holder 2, and a tooth-lifting fork-shaped crank 4 slidably connected to the outer side of the sliding block 3. It also includes a protective cover 5 installed on the outer side of the tooth holder 2, which is installed inside the sewing machine housing to protect the feeding teeth on the tooth holder 2. A protective component 6 is fixedly connected to the tooth-lifting fork-shaped crank 4 to prevent debris from falling between the tooth holder 2 and the protective cover 5 and affecting the normal operation of the tooth holder 2. The feeding link 1, tooth holder 2, sliding block 3, and tooth-lifting fork-shaped crank 4 are all prior art. Their installation positions and methods in the sewing machine can refer to the installation positions and connection methods in a sewing machine tooth-lifting mechanism with authorized publication number CN219470385U. Their specific structures and working principles are common knowledge to those skilled in the art, and their combination applications and parameter optimizations are conventional technical means in this application, which will not be described in detail here.

[0023] It should be noted that when the tooth holder 2 moves, the lifting tooth fork crank 4 moves up and down through the sliding block 3. The lifting tooth fork crank 4 can drive the protective component 6 to rise and fall inside the protective cover 5. When the tooth holder 2 rises, the lifting tooth fork crank 4 drives the protective component 6 to rise synchronously, filling the gap between the protective cover 5 and the tooth holder 2. This can effectively prevent impurities such as cotton wool from falling from the protective cover 5 into the inside of the sewing machine and affecting the normal use of the sewing machine.

[0024] The protective component 6 includes a connecting rod 601 fixedly connected to the top of the lifting fork crank 4. A connecting cover 602 is fixedly connected to the end of the connecting rod 601 away from the lifting fork crank 4. The connecting cover 602 is fixedly connected to the connecting rod 601. The connecting cover 602 and the connecting rod 601 move synchronously with the lifting fork crank 4. The connecting cover 602 is installed inside the protective cover 5 and slides inside the protective cover 5. The size of the connecting cover 602 is slightly smaller than that of the protective cover 5, and it can move up and down within the protective cover 5. A rubber ring 7 is fixedly connected to the inner ring of the connecting cover 602. The rubber ring 7 acts as a seal between the feed teeth of the feed dog 2 and the protective cover 5, which can prevent dust, lint and other debris from falling into the sewing machine through the protective cover 5.

[0025] A limiting rod 8 is fixedly connected to the outside of the connecting cover 602, and a limiting sleeve 9 is fixedly connected to the bottom of the protective cover 5. The limiting rod 8 slides inside the limiting sleeve 9. The limiting sleeve 9 is fixedly installed at an angle at the bottom of the protective cover 5. When the connecting cover 602 moves inside the protective cover 5, the limiting rod 8 slides inside the limiting sleeve 9, which can improve the stability of the connecting cover 602. The limiting sleeve 9 has a certain tilt angle. When the connecting cover 602 is not in a vertical state when it moves up and down inside the protective cover 5, the limiting rod 8 and the limiting sleeve 9 will not hinder the movement of the connecting cover 602.

[0026] Working principle: When the tooth holder 2 moves, it drives the tooth lifting fork-shaped crank 4 to move up and down through the sliding block 3. The tooth lifting fork-shaped crank 4 can drive the connecting rod 601 and the connecting cover 602 to rise and fall inside the protective cover 5. When the tooth holder 2 rises, the tooth lifting fork-shaped crank 4 drives the connecting rod 601 and the connecting cover 602 to rise synchronously, so that the connecting cover 602 is always inside the protective cover 5, filling the gap between the protective cover 5 and the tooth holder 2. This can effectively prevent impurities such as cotton wool from falling from the protective cover 5 into the sewing machine and affecting the normal use of the sewing machine.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooth-lifting mechanism for a sewing machine, comprising a feeding link (1), a tooth holder (2) rotatably mounted on the feeding link (1), a sliding block (3) fixedly connected to the tooth holder (2), and a tooth-lifting fork-shaped crank (4) slidably connected to the outer side of the sliding block (3), characterized in that, Also includes: A protective cover (5) is installed on the outside of the dental frame (2), and a protective component (6) is fixedly connected to the lifting fork-shaped crank (4) to prevent debris from falling between the dental frame (2) and the protective cover (5) and affecting the normal operation of the dental frame (2).

2. The sewing machine's feed dog mechanism according to claim 1, characterized in that: The protective component (6) includes a connecting rod (601) fixedly connected to the top of the lifting fork crank (4), and a connecting cover (602) is fixedly connected to the end of the connecting rod (601) away from the lifting fork crank (4).

3. The tooth-lifting mechanism of a sewing machine according to claim 2, characterized in that: The connecting cover (602) is installed inside the protective cover (5) and slides inside the protective cover (5).

4. The tooth-lifting mechanism of a sewing machine according to claim 2, characterized in that: A rubber ring (7) is fixedly connected to the inner ring of the connecting cover (602).

5. The tooth-lifting mechanism of a sewing machine according to claim 2, characterized in that: A limiting rod (8) is fixedly connected to the outside of the connecting cover (602), and a limiting sleeve (9) is fixedly connected to the bottom of the protective cover (5). The limiting rod (8) slides inside the limiting sleeve (9).

6. The tooth-lifting mechanism of a sewing machine according to claim 5, characterized in that: The limiting sleeve (9) is installed at an angle and fixedly at the bottom of the protective cover (5).

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