JP3242895U - sewing machine needle thickness adjuster - Google Patents

Abstract

An object of the present invention is to provide a sewing machine needle thickness adjusting device that is easy to maintain. A rocking part fixing shaft (31), a rocking part (32) pivotally attached to the rocking part fixing shaft, two feed dog interlocking rods (33) assembled to the rocking part and moving according to the rocking part, and a shaft A needle thickness adjusting device 20 for a sewing machine provided in a sewing machine including a rotary driving part 34 and a guide bar 35 connected to the swinging part and the axially rotating driving part to cause the swinging part to follow and swing. The needle thickness adjusting device consists of a main shaft provided in the shaft rotation drive part, a torque type shaft lever 22 connected to the main shaft and changing its posture when a force is applied, and an interlocking rod connected to the torque type shaft lever and the guide rod. , a drive rod set 24 connected to a torqueable axle lever, a starter piece 25 connected to the drive rod set, and a limit assembly 26, when pushed by the limit assembly against the start piece at one end of the drive rod set. range of motion is determined. [Selection drawing] Fig. 2

Description

The present invention relates to a needle thickness adjusting device for a sewing machine.

Patent Documents 1 and 2 disclose an automatic pitch adjusting device for the front and rear feed dogs of a 4-needle, 6-thread sewing machine. The device disclosed in the patent satisfies the need for needle thickness adjustment, but its structure is divided into two sides of the transmission mechanism of the feed dog of the sewing machine, so maintenance cannot be performed unless the related parts are removed with time and effort.

Taiwan Utility Model Publication No. TWM546410 Utility Model Registration No. JP3210647U

The main purpose of the present invention is to solve the problems in conventional structures.

In order to achieve the above object, the present invention provides a sewing machine needle thickness adjusting device provided in a sewing machine, comprising: a rocking part fixing shaft; a rocking part attached to the rocking part fixing shaft; two feed dog interlocking rods assembled to the rocking part and moving according to the rocking part; a shaft rotation driving part; The needle thickness adjusting device of the sewing machine includes a main shaft provided on the shaft rotation drive part, a torque type shaft lever connected to the main shaft and changing its posture when a force is applied, an interlocking rod connected to the torque type shaft lever and the guide bar, a drive rod set connected to the torque type shaft lever, a starting part connected to the drive rod set, and a limit assembly. An assembly defines a range of motion when the force application end is pushed against the activation component, and the activation component is activated upon receiving at least one signal.

In one embodiment, the torque shaft lever includes a first lever connected to the guide rod, a second lever connected to the drive rod set, and a spindle mounting hole provided at the intersection of the first lever and the second lever.

In one embodiment, the drive rod set includes a plurality of sequentially assembled rod pieces, one of the plurality of rod pieces being connected to the actuation piece and another of the plurality of rod pieces being connected to the torqueable axle lever.

In one embodiment, the limiter assembly includes two spaced apart receiving parts and one of the plurality of rod parts is provided with a protruding part limited by the two receiving parts.

In one embodiment, the limit assembly has a scale molded into the scale and the two receiving parts are positioned within the rail and are adjustable in position.

In one embodiment, the sewing machine includes a housing, the scale is mounted on the housing, and the two receiving parts and the protruding part are exposed from the housing.

In one embodiment, the activation component is provided on the housing.

In one embodiment, the actuation component is a pneumatic push rod.

The present invention implemented as described above has the following features compared with the conventional configuration. The needle thickness adjusting device for the sewing machine of the present invention can adjust the needle thickness, and the entire needle thickness adjusting device for the sewing machine is located near the shaft rotation driving part, so maintenance is easy.

FIG. 1 is a structural schematic view of the present invention installed in a sewing machine. FIG. 2 is a structural schematic diagram of the present invention. FIG. 3 is an exploded schematic diagram of the partial structure of the present invention. FIG. 4 is a schematic side view of the structure of the present invention. FIG. 5 is a schematic side view of the partial structure of the present invention.

Hereinafter, the technical contents of the present invention will be described in detail with reference to the drawings.
Referring to FIG. 1 , the present invention provides a sewing machine needle thickness adjusting device 20, which is installed in a sewing machine 30, including a swinging part fixing shaft 31, a swinging part 32, two feed dog interlocking rods 33, a shaft rotation driving part 34 and a guide rod 35. The swinging part 32 is pivotally attached to the swinging part fixing shaft 31, two feed dog interlocking rods 33 are assembled to the swinging part 32 and move according to the swinging part 32, and the two feed dog interlocking rods 33 are connected to two feed teeth (not shown). The guide rod 35 is connected to the swinging part 32 and the axially rotating driving part 34 to cause the swinging part 32 to swing.

2 to 5, the sewing machine needle thickness adjusting device 20 of the present invention includes a main shaft 21, a torque type shaft lever 22, an interlocking rod 23, a driving rod set 24, a starting part 25 and a limiting assembly 26. The main shaft 21 is provided on the shaft rotation drive part 34, the torque type shaft lever 22 is connected to the main shaft 21, and the torque type shaft lever 22 rotates around the main shaft 21 and changes its posture when a force is applied. The interlocking rod 23 is connected to the torque-type shaft lever 22, and the drive rod set 24 is connected to the end of the torque-type shaft lever 22 to which the interlocking rod 23 is not connected. Further, the drive rod set 24 has a push end 241 connected to the torqueable axle lever 22 and a force application end 242 connected to the actuating component 25 . When the force acting end 242 of the drive rod set 24 is driven by the starting part 25, the push end 241 of the drive rod set 24 is driven to change the attitude of the torque type shaft lever 22, and the change of the attitude of the torque type shaft lever 22 moves the interlocking rod 23 in conjunction. Limiting assembly 26 also establishes a range of motion 261 when force application end 242 of drive rod set 24 is pushed by actuation component 25 . Also, in one embodiment, actuation component 25 is a pneumatic push rod.

Further, activation component 25 is activated by receiving at least one signal, which signal may be generated by the operator of the sewing machine operating a trigger component (eg, a pedal). When the starting part 25 is actuated, the force acting end 242 of the driving rod assembly 24 changes its position, which causes the torque type shaft lever 22 and the interlocking rod 23 to move. Finally, the interlocking rod 23 changes the movement of the guide rod 35 to change the swinging width of the swinging part 32. As the swinging width of the swinging part 32 changes, the forward and rearward displacement distance of the two feed dog interlocking bars 33 changes, resulting in a change in the thickness of the sewing needle during sewing. In addition, the entire needle thickness adjusting device 20 of the sewing machine of the present invention is located on the shaft rotation driving part 34 side, which facilitates maintenance later.

3 and 5, in one embodiment, torque-type shaft lever 22 includes a first lever 221, a second lever 222, and a spindle mounting hole 223. As shown in FIG. The free end of the first lever 221 is connected to the guide rod 35 and the free end of the second lever 222 is connected to the drive rod set 24 . A main shaft mounting hole 223 is provided at the intersection of the first lever 221 and the second lever 222 , and the main shaft 21 passes through the main shaft mounting hole 223 . Additionally, the torque lever 22 may be a combination of multiple parts or may be implemented as a one-piece construction. In one embodiment, the drive rod set 24 includes a plurality of rod pieces 243 that are assembled sequentially, one of the plurality of rod pieces 243 being connected to the actuation piece 25 and another of the plurality of rod pieces 243 being connected to the torqueable axle lever 22. Note that the plurality of rod parts 243 do not necessarily have the same structure, and each form can be adjusted according to practical needs.

2-4, in one embodiment, the limit assembly 26 includes two receiving parts 262, the two receiving parts 262 are spaced apart, and the range between the two receiving parts 262 is the range of motion 261. Also, one of the plurality of rod parts 243 is provided with a projecting part 245, the projecting part 245 changes its position according to the movement of one of the plurality of rod parts 243 assembled with it, and the projecting part 245 is limited by two receiving parts 262 and can only move within a movable range 261. - 特許庁This limits the range of needle thickness adjustment. Further, in one embodiment, the limit assembly 26 has a scale 263, the scale 263 is molded with rails 264, and the two receiving parts 262 are positioned within the rails 264 and are adjustable in position, i.e., the range of motion 261 is not constant in the present invention, and can be adjusted according to sewing needs.

Referring to FIG. 1, in one embodiment, the sewing machine 30 includes a housing 36, a scale 263 is provided on the housing 36, and two receiving parts 262 and a protruding part 245 are each exposed from the housing 36 so that a sewing machine maintenance person or operator of the sewing machine can directly observe and facilitate adjustment. Also, in the present invention, the activating part 25 is provided on the housing 36 , more specifically, the activating part 25 is exposed from the housing 36 . Such a design avoids complicating the design of the interior of the sewing machine 30 with the actuating part 25, and since the actuating part 25 is provided on the outer surface of the housing 36, the actuating part 25 can be easily connected to other parts (e.g., an air pump) that work together. Furthermore, the design of the drive rod set 24 in which only the protruding part 245 is exposed from the housing 36 avoids accidental contact during use by the operator of the sewing machine.

20 Sewing needle thickness adjusting device 21 Main shaft 22 Torque type shaft lever 221 First lever 222 Second lever 223 Main shaft mounting hole 23 Interlocking rod 24 Drive rod set 241 Push end 242 Force acting end 243 Rod part 245 Protruding part 25 Starting part 26 Limiting assembly 261 Range of motion 262 Receiving part 263 Scale 264 Rail 30 Sewing Machine 31 Swing Part Fixing Shaft 32 Swing Part 33 Feed Dog Interlocking Rod 34 Shaft Rotation Drive Part 35 Guide Rod 36 Housing

Claims (8)

A needle thickness adjusting device for a sewing machine provided in a sewing machine, comprising: a rocking part fixing shaft; a rocking part pivotally attached to the rocking part fixing shaft; two feed dog interlocking rods assembled to the rocking part and moving according to the rocking part; a shaft rotation driving part;
The needle thickness adjusting device of the sewing machine comprises:
a main shaft provided in the shaft rotation drive component;
a torque type shaft lever that is connected to the main shaft and changes its posture when a force is applied;
an interlocking rod connected to the torque type shaft lever and the guide rod;
a drive rod set connected to the torque type shaft lever;
a starting component connected to the drive rod set;
restricted assembly;
including
The drive rod set is
a pushing end connected to the torque-type axle lever;
a force application end connected to the activation component;
has
A needle thickness adjustment device for a sewing machine, wherein said limiter assembly defines a range of motion when pushed by said actuating member of said force application end, said actuating member being actuated upon receipt of at least one signal. The torque type shaft lever is
a first lever connected to the guide rod;
a second lever connected to the drive rod set;
a spindle mounting hole provided at the intersection of the first lever and the second lever;
The sewing machine needle thickness adjusting device according to claim 1, characterized by comprising: The drive rod set includes a plurality of rod parts assembled sequentially,
3. The sewing machine needle thickness adjusting device according to claim 1, wherein one of said plurality of rod parts is connected to said actuating part, and another one of said plurality of rod parts is connected to said torque type shaft lever. the restriction assembly includes two spaced-apart receiving parts;
4. The sewing machine needle thickness adjusting device according to claim 3, wherein one of said plurality of rod members is provided with a projecting member limited by said two receiving members. 5. The sewing machine needle thickness adjusting device according to claim 4, wherein said limiting assembly has a scale, said scale is molded with a rail, and said two receiving members are positioned within said rail and are adjustable in position. 6. The needle thickness adjusting device for a sewing machine according to claim 5, wherein said sewing machine includes a housing, said scale is provided on said housing, and said two receiving parts and said projecting part are exposed from said housing. 7. The sewing machine needle thickness adjusting device according to claim 6, wherein said starting part is provided on said housing. 8. The sewing machine needle thickness adjusting device according to claim 7, wherein said starting member is a pneumatic push rod.