Sewing machine

Abstract

The utility model discloses a sewing machine which comprises a base, a machine head and a protective cover. A needle plate and a thread hooking mechanism (not shown) are arranged on the base. The machine head is connected to the base, a machine needle mechanism and a presser foot mechanism are arranged on the machine head, and the machine needle mechanism is provided with a machine needle rod and a machine needle located at the end of the machine needle rod. And the protective cover is movably arranged on the machine head, is positioned on the peripheral side of the machine needle rod, and has an extending state of extending towards the base and shielding the machine needle and a retracting state of retracting towards the inner side of the machine head and being far away from the machine needle. When the sewing machine is in the stretching-out state, the protection cover can stretch out in the direction of the base to shield the machine needle, fingers of a child can be effectively prevented from making contact with the machine needle, and the safety risk in the using process is reduced. When needle replacement or threading operation needs to be carried out, the protective cover can retract towards the inner side of the machine head, enough space is reserved for needle replacement or threading operation, operation is easy, tedious operation and safety risks in the dismounting process are avoided, and the use safety of the sewing machine is greatly improved.

Description

Technical Field

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

[0002] Sewing machines achieve their sewing function through mechanical principles and are widely used in the production of clothing, home textiles, and other textiles. A sewing machine mainly consists of a needle mechanism, a presser foot mechanism, and a thread-hooking mechanism. The needle mechanism comprises a needle bar and a needle. The needle bar drives the needle in a reciprocating motion, and the needle directly acts on the fabric for sewing. The presser foot mechanism, located below the needle, primarily holds the fabric in place during sewing, preventing displacement during needle penetration and ensuring even and neat stitches. The thread-hooking mechanism is a crucial component for stitch formation, mainly consisting of a rotatable thread hook and a drive mechanism that rotates it. During rotation, the thread hook works in conjunction with the needle to interweave the bobbin thread and the top thread, forming a strong stitch. The rotation speed of the thread-hooking mechanism must be precisely matched to the up-and-down movement frequency of the needle. These mechanisms work together to pass the thread through the fabric, and through the piercing of the needle and the pulling of the hooked thread, a tight seam is achieved.

[0003] Sewing machines are used both as household appliances and as children's toys. To prevent children's fingers from being pinched by the needle, existing sewing machines have a protective cover installed on the outside of the needle. This cover is fixed in position and can protect children's fingers from needle pinching during normal use. However, when users need to change the needle or thread the needle, the protective cover must be removed. The removal process is relatively cumbersome, requiring tools and specific steps, which can be difficult for users unfamiliar with the operation, especially children or parents. More importantly, if the user accidentally starts the sewing machine after removing the protective cover, the needle will immediately move up and down, which can easily cause accidental injury to the user's fingers, posing a serious safety hazard.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] This utility model provides a sewing machine.

[0006] This application provides the following technical solution:

[0007] A sewing machine, comprising:

[0008] The base is equipped with a needle plate and a hook-and-thread mechanism.

[0009] The machine head is connected to the base. The machine head is provided with a needle mechanism and a presser foot mechanism. The needle mechanism has a needle bar and a needle located at the end of the needle bar.

[0010] A protective cover is movably disposed on the machine head. The protective cover is located around the needle bar. The protective cover has a state in which it extends toward the base to block the extended state of the needle and a state in which it retracts toward the inside of the machine head to move away from the needle.

[0011] Optionally, the sewing machine includes a locking mechanism and a first elastic component;

[0012] Both the locking mechanism and the first elastic component are disposed inside the machine head;

[0013] The first elastic component abuts against the machine head and the protective cover at both ends, respectively.

[0014] In the retracted state, the locking mechanism locks the protective cover, and the deformation of the first elastic component increases;

[0015] Under the action of external force, the locking mechanism can release the protective cover, the first elastic component restores its deformation, pushes the protective cover to move, and the protective cover switches to the extended state.

[0016] Optionally, the locking mechanism includes a lever, a button, and a second elastic component;

[0017] The rod is movably mounted on the machine head, with one end of the rod extending out of the machine head and connected to a button.

[0018] The second elastic component abuts against the rod and the machine head at both ends, respectively;

[0019] A locking block is provided on the rod body;

[0020] In the retracted state, the locking block engages with the protective cover;

[0021] When an external force is applied to the button, the rod moves, causing the locking block to disengage from the protective cover, and the protective cover moves toward the base side under the action of the first elastic component.

[0022] Optionally, the locking block is located on one side of the rod in the radial direction;

[0023] The card block has a top support surface and a side slope;

[0024] The protective cover has a snap-fit ​​plate that extends in the vertical telescopic direction;

[0025] Under the action of external force, the protective cover moves to one side of the machine head, causing the snap-fit ​​plate to move along the side slope, pushing the snap-fit ​​block to move until the snap-fit ​​plate is limited to the top support surface.

[0026] Optionally, a guide tube is provided on the protective cover;

[0027] The machine head is equipped with guide columns;

[0028] The guide cylinder is slidably fitted onto the guide post.

[0029] Optionally, the sewing machine includes a first switch, a lighting power supply circuit, and a lighting lamp;

[0030] The lighting lamp is mounted on the machine head;

[0031] The first switch is located inside the machine head;

[0032] The lighting power supply circuit is connected to the first switch and the lighting lamp respectively;

[0033] In the retracted state, the protective cover contacts the first switch to turn on the power supply circuit of the lighting lamp;

[0034] In the extended state, the protective cover detaches from the first switch, and the first switch disconnects the power supply circuit of the lighting lamp.

[0035] Optionally, the sewing machine includes a sewing power supply circuit and a second switch;

[0036] The second switch is located inside the machine head;

[0037] The sewing power supply circuit is electrically connected to the second switch, the needle mechanism, and the hook mechanism, respectively.

[0038] In the extended state, the protective cover contacts the second switch to activate the sewing power supply circuit;

[0039] In the retracted state, the protective cover disengages from the second switch, and the second switch disconnects the sewing power supply circuit.

[0040] Optionally, a trigger plate is provided protruding from the surface of the protective cover;

[0041] In the extended state, the trigger plate presses the second switch to activate the sewing power supply circuit.

[0042] Optionally, the protective cover is provided with a lifting part.

[0043] Optionally, the protective cover is provided with a groove to avoid seams, the groove extending to the lower edge of the protective cover.

[0044] By adopting the above technical solution, this application has the following beneficial effects:

[0045] When the sewing machine of this application is in the extended state, the protective cover can extend towards the base to cover the needle, effectively preventing children's fingers from contacting the needle and reducing safety risks during use. When it is necessary to change the needle or thread the thread, the protective cover can retract inward to the machine head, leaving sufficient space for the operation. This simplifies the process and avoids the cumbersome and risky disassembly process, greatly improving the safety of the sewing machine. Attached Figure Description

[0046] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0047] Figure 1 This is a schematic diagram of the external structure of a sewing machine provided in an embodiment of the present utility model;

[0048] Figure 2 This is a schematic diagram of the internal structure of a sewing machine provided in an embodiment of the present utility model;

[0049] Figure 3 This is a schematic diagram of the internal structure of a sewing machine with a protective cover removed, provided in an embodiment of the present invention.

[0050] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0051] Figure 5 A partial structural schematic diagram of a sewing machine provided for an embodiment of this utility model;

[0052] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0053] Figure 7 for Figure 5 Enlarged view of point C in the middle;

[0054] Figure 8 A schematic diagram of the structure of the protective cover for a sewing machine provided in an embodiment of this utility model;

[0055] Figure 9 This is a schematic diagram of the locking mechanism of a sewing machine provided in an embodiment of the present utility model.

[0056] In the diagram: base 1, needle plate 11, machine head 2, needle mechanism 21, needle bar 211, needle 212, presser foot mechanism 22, guide post 23, protective cover 3, convex shell 31, lifting part 311, groove 312, top abutment 32, snap-fit ​​plate 33, trigger plate 34, guide cylinder 35, locking mechanism 4, rod body 41, locking block 411, top support surface 4111, side slope 4112, button part 42, first elastic component 5, first switch 6, first movable electrical connector 61, first fixed electrical connector 62, lighting lamp 7, second switch 8, second movable electrical connector 81, second fixed electrical connector 82. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0058] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0059] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0060] See Figures 1 to 9As shown in the figure, this application provides a sewing machine, including: a base 1, a sewing head 2, and a protective cover 3. A needle plate 11 and a thread hooking mechanism (not shown) are disposed on the base 1. The sewing head 2 is connected to the base 1, and a needle mechanism 21 and a presser foot mechanism 22 are disposed on the sewing head 2. The needle mechanism 21 has a needle 212 rod 211 and a needle 212 located at the end of the needle 212 rod 211. The thread hooking mechanism, the needle mechanism 21, and the presser foot mechanism 22 are conventional structures in the art, and their specific structures and working principles are mature existing technologies in the art, which will not be described in detail here. The protective cover 3 is movably disposed on the sewing head 2. The protective cover 3 is located around the needle 212 rod 211. The protective cover 3 has an extended state extending towards the base 1 to block the needle 212 and a retracted state retracting towards the inside of the sewing head 2, away from the needle 212. In both the extended and retracted states, the protective cover 3 moves a short distance. In the retracted state, only sufficient space is needed for needle replacement or threading. The protective cover 3 extends along the length of the needle 212 rod 211. In the extended state, the protective cover 3 of this sewing machine can extend towards the base 1 to cover the needle 212, effectively preventing children's fingers from contacting the needle 212 and reducing safety risks during use. When needle replacement or threading is required, the protective cover 3 can retract inward towards the machine head 2, leaving sufficient space for needle replacement or threading. This simplifies operation and avoids the cumbersome and risky disassembly process, greatly improving the safety of the sewing machine.

[0061] like Figure 2 , Figure 5 and Figure 6As shown, the sewing machine includes a locking mechanism 4 and a first elastic component 5. Both the locking mechanism 4 and the first elastic component 5 are disposed inside the machine head 2. The two ends of the first elastic component 5 abut against the machine head 2 and the protective cover 3, respectively. In the retracted state, the locking mechanism 4 locks the protective cover 3, and the deformation of the first elastic component 5 increases. Under the action of external force, the locking mechanism 4 can release the protective cover 3, and the first elastic component 5 restores its deformation, pushing the protective cover 3 to move, so that the protective cover 3 switches to the extended state. The protective cover 3 has a convex shell 31 and abutting top 32. The convex shell 31 is vertically connected to the abutting top 32. The concave side of the convex shell 31 faces the needle 212 rod 211. The first elastic component 5 can be a spring. The protective cover 3 has an abutting top 32 at one end near the machine head 2. One end of the first elastic component 5 abuts against the machine head 2, and the other end abuts against the abutting top 32. In the retracted state, the protective cover 3 retracts inward towards the machine head 2, locking the protective cover 3 with the locking mechanism 4. The protective cover 3 cannot move, and the first elastic member 5 is compressed and shortened. At this time, sufficient space is left at the needle 212 for needle replacement or threading operations. Under external force, the locking mechanism 4 releases the protective cover 3, and the first elastic member 5 returns to its original shape, pushing the protective cover 3 to move, thus covering the needle 212. This effectively prevents children's fingers from contacting the needle 212, reducing safety risks during use and avoiding the cumbersome operation and safety risks during disassembly.

[0062] In one possible implementation, such as Figure 2 , Figure 5 , Figure 6 and Figure 9As shown, the locking mechanism 4 includes a rod 41, a button portion 42, and a second elastic component (not shown). The rod 41 is movably mounted on the machine head 2, with one end extending out of the machine head 2 and connected to the button portion 42. The two ends of the second elastic component abut against the rod 41 and the machine head 2, respectively. A locking block 411 is provided on the rod 41. The button portion 42 can be detachably connected to the end of the rod 41 extending out of the machine head 2, or the button portion 42 can be a fixed integral structure with the rod 41. In the retracted state, the locking block 411 engages with the protective cover 3. When an external force is applied to the button, the rod 41 moves, causing the locking block 411 to disengage from the protective cover 3. The protective cover 3 moves towards the base 1 under the action of the first elastic component 5. The rod 41 extends in a direction perpendicular to the rod 211 of the needle 212. In the retracted state, the locking block 411 can engage with the protective cover 3, fixing the position of the protective cover 3 to facilitate needle replacement or threading operations. The second elastic component can also be a spring. When an external force is applied to the button, the rod 41 moves, the second elastic component is compressed and shortened, causing the locking block 411 and the protective cover 3 to disengage. The first elastic component 5 then returns to its original shape, pushing the protective cover 3 to move, causing the protective cover 3 to cover the needle 212.

[0063] like Figure 2 , Figure 5 and Figure 9 As shown, the locking block 411 is located on one radial side of the rod 41. The locking block 411 has a top support surface 4111 and a side inclined surface 4112. The protective cover 3 has a locking plate 33 extending in the vertical telescopic direction. Under the action of external force, the protective cover 3 moves towards the machine head 2, causing the locking plate 33 to move along the side inclined surface 4112, pushing the locking block 411 until the locking plate 33 is limited to the top support surface 4111. At this time, the locking plate 33 is locked into the protective cover 3. When external force is applied to the button, the rod 41 moves, causing the locking block 411 and the protective cover 3 to disengage. The first elastic member 5 returns to its original deformation, pushing the protective cover 3 to move, so that the protective cover 3 blocks the machine needle 212.

[0064] like Figure 2 , Figure 5 and Figure 8As shown, a guide cylinder 35 is provided on the protective cover 3, and a guide post 23 is provided inside the machine head 2. The guide cylinder 35 is slidably sleeved on the guide post 23. The first elastic member 5 is sleeved on the guide post 23, and the guide post 23 extends along the direction of movement of the protective cover 3. The guide post 23 guides the protective cover 3 to move only along the direction of extension of the guide post 23, without deviating from its position.

[0065] In one possible implementation, such as Figure 5 and Figure 6 As shown, the sewing machine includes a first switch 6, a lighting power supply circuit (not shown), and a light 7. The light 7 is mounted on the machine head 2, and the first switch 6 is located inside the machine head 2. The lighting power supply circuit is connected to both the first switch 6 and the light 7. In the retracted state, the protective cover 3 contacts the first switch 6 to activate the power supply circuit of the light 7. In the extended state, the protective cover 3 disengages from the first switch 6, and the first switch 6 disconnects the power supply circuit of the light 7. The first switch 6 includes a first movable electrical connector 61 and a first fixed electrical connector 62 arranged in parallel. When the first movable electrical connector 61 and the first fixed electrical connector 62 are in contact, the power supply circuit is activated, and the light 7 illuminates. The first switch 6 is located above the locking block 411 inside the machine head 2. In the retracted state, the protective cover 3 moves inward into the machine head 2, causing the locking block 411 to move and contact the first movable electrical connector 61. This causes the first movable electrical connector 61 to contact the first fixed electrical connector 62, activating the power supply circuit of the lighting lamp 7, and the lighting lamp 7 illuminates. In the extended state, the first movable electrical connector 61 moves away from the first fixed electrical connector 62, the first switch 6 is in the off state, and the lighting lamp 7 is not illuminated. When the lighting lamp 7 is on, it indicates that the protective cover 3 is properly engaged and will not move, facilitating subsequent threading and needle replacement operations.

[0066] In one possible implementation, such as Figure 5 and Figure 7As shown, the sewing machine includes a sewing power supply circuit (not shown) and a second switch 8. The second switch 8 is located inside the machine head 2. The sewing power supply circuit is electrically connected to the second switch 8, the needle mechanism 21, and the thread hooking mechanism. In the extended state, the protective cover 3 contacts the second switch 8 to conduct the sewing power supply circuit. In the retracted state, the protective cover 3 disengages from the second switch 8, and the second switch 8 disconnects the sewing power supply circuit. In the retracted state, the second switch 8 disconnects the sewing power supply circuit, preventing the needle mechanism 21 from operating and ensuring the safety of needle changing and threading operations. In the extended state, the sewing machine can operate normally.

[0067] like Figure 5 , Figure 7 and Figure 8 As shown, a trigger plate 34 protrudes from the surface of the protective cover 3. In the extended state, the trigger plate 34 presses the second switch 8 to activate the sewing power supply circuit. The second switch 8 includes a second movable electrical connector 81 and a second fixed electrical connector 82 arranged in parallel. When the second movable electrical connector 81 and the second fixed electrical connector 82 are in contact, the sewing power supply circuit is activated, and the sewing machine can operate normally. In the extended state, the protective cover 3 moves, causing the trigger plate 34 to press the second movable electrical connector 81, causing the second movable electrical connector 81 and the second fixed electrical connector 82 to contact, activating the sewing power supply circuit. In the retracted state, the protective cover 3 moves back into the machine head 2, and the second movable electrical connector 81 returns to its original position away from the second fixed electrical connector 82, disconnecting the sewing power supply circuit.

[0068] In one possible implementation, such as Figure 1 , Figure 2 and Figure 8 As shown, the protective cover 3 is provided with a lifting part 311. The lifting part 311 can be a plate extending outward from the convex shell part 31. This allows for easy movement of the protective cover 3 by using a finger to operate on the plate, making the movement of the protective cover 3 simple and convenient.

[0069] like Figure 2 and Figure 8 As shown, the protective cover 3 is provided with a groove 312 to avoid the seam thread, and the groove 312 extends to the lower edge of the protective cover 3. The groove 312 has the function of avoiding the seam thread, and the thread passing through the needle 212 can extend out from the groove 312.

[0070] The preferred embodiments disclosed above are merely illustrative of this application. These preferred embodiments do not exhaustively describe all details, nor do they limit the application to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A sewing machine characterized by comprising: include: The base is equipped with a needle plate and a hook-and-loop mechanism. The machine head is connected to the base. The machine head is provided with a needle mechanism and a presser foot mechanism. The needle mechanism has a needle bar and a needle located at the end of the needle bar. A protective cover is movably disposed on the machine head. The protective cover is located around the needle bar. The protective cover has a state in which it extends toward the base to block the extended state of the needle and a state in which it retracts toward the inside of the machine head to move away from the needle.

2. The sewing machine according to claim 1, characterized in that, Includes a locking mechanism and a first elastic component; Both the locking mechanism and the first elastic component are disposed inside the machine head; The first elastic component abuts against the machine head and the protective cover at both ends, respectively. In the retracted state, the locking mechanism locks the protective cover, and the deformation of the first elastic component increases; Under the action of external force, the locking mechanism can release the protective cover, the first elastic component restores its deformation, pushes the protective cover to move, and the protective cover switches to the extended state.

3. The sewing machine of claim 2, wherein, The locking mechanism includes a lever, a button, and a second elastic component; The rod is movably mounted on the machine head, with one end of the rod extending out of the machine head and connected to a button. The second elastic component abuts against the rod and the machine head at both ends, respectively; A locking block is provided on the rod body; In the retracted state, the locking block engages with the protective cover; When an external force is applied to the button, the rod moves, causing the locking block to disengage from the protective cover, and the protective cover moves toward the base side under the action of the first elastic component.

4. The sewing machine of claim 3, wherein The locking block is located on one side of the rod in the radial direction; The card block has a top support surface and a side slope; The protective cover has a snap-fit ​​plate that extends in the vertical telescopic direction; Under the action of external force, the protective cover moves to one side of the machine head, causing the snap-fit ​​plate to move along the side slope, pushing the snap-fit ​​block to move until the snap-fit ​​plate is limited to the top support surface.

5. The sewing machine of claim 1, wherein, A guide tube is provided on the protective cover; The machine head is equipped with guide columns; The guide cylinder is slidably fitted onto the guide post.

6. The sewing machine of claim 1, wherein, Includes the first switch, the lighting power supply circuit, and the lighting lamp; The lighting lamp is mounted on the machine head; The first switch is located inside the machine head; The lighting power supply circuit is connected to the first switch and the lighting lamp respectively; In the retracted state, the protective cover contacts the first switch to turn on the power supply circuit of the lighting lamp; In the extended state, the protective cover detaches from the first switch, and the first switch disconnects the power supply circuit of the lighting lamp.

7. The sewing machine of claim 1, wherein, Includes sewing power supply circuit and second switch; The second switch is located inside the machine head; The sewing power supply circuit is electrically connected to the second switch, the needle mechanism, and the hook mechanism, respectively. In the extended state, the protective cover contacts the second switch to activate the sewing power supply circuit; In the retracted state, the protective cover disengages from the second switch, and the second switch disconnects the sewing power supply circuit.

8. The sewing machine according to claim 7, characterized in that, A trigger plate is protruding from the surface of the protective cover; In the extended state, the trigger plate presses the second switch to activate the sewing power supply circuit.

9. The sewing machine of claim 1, wherein, A pulling part is arranged on the protective cover.

10. The sewing machine according to any one of claims 1 to 9, characterized in that, A strip groove for avoiding suture is arranged on the protective cover, and the strip groove extends to the lower edge of the protective cover.

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