Sewing machine closed type electric control bottom plate structure

Abstract

The utility model belongs to the technical field of sewing machines, and relates to a closed electric control bottom plate structure of a sewing machine, which comprises a complete machine, a rear cover, a vertical radiating fin, a circuit board and an electric control housing which are sequentially arranged, a radiating surface and a mounting surface are respectively formed on two sides of the vertical radiating fin, and the vertical radiating fin is arranged along the edge contour of the circuit board. The utility model relates to a mounting bracket, which sequentially comprises a first horizontal section, an inclined section, a vertical section and a second horizontal section, the first horizontal section, the vertical section and the second horizontal section are respectively provided with a mounting surface, the inclined section is provided with a first mounting hole column, and a second mounting hole column is arranged between the vertical section and the second horizontal section. And the first mounting hole column and the second mounting hole column are respectively connected with the electric control housing and the whole machine in a fastening manner through fasteners. The closed type electric control bottom plate structure of the sewing machine has better heat dissipation performance and better overall stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines and relates to a closed electric control bottom plate structure of a sewing machine. Background Art

[0002] At present, most of the existing sewing machine electronic controls are combined with the bottom plate in a horizontal type, and some are vertical. The vertical electronic control bottom plate is assembled with the dustproof back cover and the electronic control cover to form a closed electronic control bottom plate structure. The electronic control of this structure ensures the dustproof effect and the stability and functionality during operation.

[0003] Chinese utility model patent CN206274706U (publication date: 2017-06-23) discloses a vertical heat sink structure of a sewing machine, which belongs to the technical field of sewing equipment. It solves the technical problems of the existing integrated sewing machine head being large in size and having poor heat dissipation effect. The vertical heat sink structure of the sewing machine includes a plate body, which is in the shape of a bent long strip, one side of the plate body has a heat dissipation surface, and the other side of the plate body has a mounting surface 1 for installing IGBT and a mounting surface 2 for installing a brake resistor. The side of the plate body also has a mounting hole for installing a PCB motherboard. In the utility model, the plate body for heat dissipation is designed to be in the shape of a bent long strip, which can cooperate with the installation of the motor and the hand wheel, and the motor drives the hand wheel to rotate to generate airflow to quickly take away the heat, so as to achieve a good effect of active heat dissipation; at the same time, the main heat-generating components IGBT and brake resistor are directly installed on the plate body, which improves the heat dissipation efficiency, saves space, and makes the sewing machine head structure more compact.

[0004] The heat dissipation performance of the above-mentioned vertical heat sink is still insufficient, and the installation structure of the vertical heat sink is not stable enough, which affects the overall stability of the electronic control. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a closed electric control bottom plate structure for a sewing machine, which has better heat dissipation performance and better overall stability.

[0006] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0007] A closed electric control base plate structure for a sewing machine comprises a whole machine, a back cover, a vertical heat sink, a circuit board and an electric control cover shell which are arranged in sequence, wherein two sides of the vertical heat sink respectively form a heat dissipation surface and a mounting surface, the vertical heat sink is arranged along the edge contour of the circuit board, and comprises a first horizontal section, an inclined section, a vertical section and a second horizontal section in sequence, the first horizontal section, the vertical section and the second horizontal section are all provided with mounting surfaces, the inclined section is provided with a first mounting hole column, a second mounting hole column is provided between the vertical section and the second horizontal section, and the first mounting hole column and the second mounting hole column are respectively fastened to the electric control cover shell and the whole machine through fasteners.

[0008] In the above-mentioned closed electric control bottom plate structure of a sewing machine, a connecting plate is arranged on the inclined section, the connecting plate is arranged perpendicular to the inclined section and extends in the direction of the circuit board, the first mounting hole column is arranged at the end of the connecting plate, and the circuit board is provided with a through hole for the first mounting hole column to pass through. Preferably, the through hole is located in the middle area of ​​the circuit board.

[0009] In the above-mentioned closed electric control base plate structure of a sewing machine, a first countersunk column cooperating with a first mounting hole column and a second countersunk column cooperating with a second mounting hole column are arranged on the inner side of the electric control cover; the fastener passes through the first countersunk column and the first mounting hole column and is screwed and fixed to the first threaded hole on the whole machine; passes through the second countersunk column and the second mounting hole column and is screwed and fixed to the second threaded hole on the whole machine; the first threaded hole and the second threaded hole are arranged on the end face of the whole machine, or a protrusion is arranged on the end face of the whole machine to form the first threaded hole and the second threaded hole.

[0010] In the above-mentioned closed electric control base plate structure of a sewing machine, the IGBT on the circuit board is respectively mounted on the mounting surfaces of the first horizontal section and the vertical section, and the brake resistor is mounted on the mounting surface of the second horizontal section.

[0011] In the above-mentioned closed electric control base plate structure of a sewing machine, a circuit board mounting stop is provided on the side of the vertical heat sink close to the rear cover, and the circuit board is reversely mounted on the vertical heat sink. Three circuit board mounting holes are provided in the mounting stop, and the circuit board mounting holes are respectively located at the end of the first horizontal section away from the inclined section, the end of the vertical section away from the inclined section, and the inclined section.

[0012] In the above-mentioned closed electric control bottom plate structure of a sewing machine, the electric control housing and the rear cover are in a compressed state after being assembled, and form a sealing structure of a vertical heat sink respectively.

[0013] In the above-mentioned closed electric control base plate structure of a sewing machine, a dustproof baffle is arranged in the electric control cover, and the setting direction of the dustproof baffle is determined according to the wind direction.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model provides a closed electric control bottom plate structure for a sewing machine, improves the structure of the vertical heat sink, further increases the installation surface of the vertical heat sink, and improves the heat dissipation performance of the electric control.

[0016] 2. The utility model improves the installation structure of the vertical heat sink by arranging a pair of mounting hole columns at specific positions and fastening them to the electric control housing and the whole machine at the same time with fasteners, so that the installation structure of the vertical heat sink is more stable, thereby increasing the overall stability of the electric control.

[0017] 3. The utility model utilizes the circuit board mounting stop to reversely mount the circuit board, thereby maximizing the heat dissipation space; while pressing the electric control housing and the rear cover, a sealing structure of the vertical heat sink is formed, thereby improving the overall sealing of the electric control; a dust baffle is arranged in the electric control housing according to the wind direction, thereby preventing dust from entering to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 yes Figure 1 Exploded diagram of

[0020] Figure 3 It is a three-dimensional diagram of the electric control cover and the vertical heat sink of the utility model;

[0021] Figure 4 It is a three-dimensional diagram of the vertical heat sink of the utility model;

[0022] Figure numerals: 1. complete machine; 2. back cover; 3. vertical heat sink; 31. heat dissipation surface; 32. mounting surface; 33. first horizontal section; 34. inclined section; 35. vertical section; 36. second horizontal section; 37. first mounting hole column; 38. second mounting hole column; 39. connecting plate; 310. mounting stop; 311. circuit board mounting hole; 4. circuit board; 41. through hole; 5. electric control cover; 51. first countersunk column; 52. second countersunk column; 53. dust baffle. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings. Figure 1-4 :

[0024] A closed electric control base plate structure of a sewing machine comprises a whole machine 1, a back cover 2, a vertical heat sink 3, a circuit board 4 and an electric control cover 5 which are arranged in sequence, wherein two sides of the vertical heat sink 3 respectively form a heat dissipation surface 31 and a mounting surface 32, the vertical heat sink 3 is arranged along the edge contour of the circuit board 4, and comprises a first horizontal section 33, an inclined section 34, a vertical section 35 and a second horizontal section 36 in sequence, the first horizontal section 33, the vertical section 35 and the second horizontal section 36 are all provided with a mounting surface 32, the inclined section 34 is provided with a first mounting hole column 37, a second mounting hole column 38 is provided between the vertical section 35 and the second horizontal section 36, the first mounting hole column 37 and the second mounting hole column 38 are respectively fastened to the electric control cover 5 and the whole machine 1 through fasteners.

[0025] In this embodiment, the vertical heat sink 3 provides three groups of mounting surfaces 32, and the main heat-generating components on the circuit board 4 can be directly mounted on the mounting surfaces 32 of the vertical heat sink 3. The heat generated by the heat-generating components is transferred to the vertical heat sink 3 and then dissipated to the outside through the heat dissipation surface 31. During installation, the fasteners are respectively inserted from the outside of the electric control cover 5 into the inner holes of the first mounting hole column 37 and the second mounting hole column 38, and then penetrate the first mounting hole column 37 and the second mounting hole column 38 to be fixedly connected to the whole machine 1.

[0026] Compare with Figure 2 , a connecting plate 39 is arranged on the inclined section 34, the connecting plate 39 is arranged perpendicular to the inclined section 34 and extends in the direction of the circuit board 4, the first mounting hole column 37 is arranged at the end of the connecting plate 39, and the circuit board 4 is provided with a through hole 41 for the first mounting hole column 37 to pass through. Preferably, the through hole 41 is located in the middle area of ​​the circuit board 4. When designing, the connecting plate 39 avoids the components on the circuit board 4 and extends to the middle, and the fixing position of the first mounting hole column 37 is set to a suitable position. By fixing the position biased towards the middle area, a more stable mounting structure can be obtained.

[0027] Compare with Figure 3 Furthermore, the inner side of the electric control cover 5 is provided with a first countersunk column 51 cooperating with the first mounting hole column 37 and a second countersunk column 52 cooperating with the second mounting hole column 38. The fastener passes through the first countersunk column 51 and the first mounting hole column 37 and is screwed and fixed to the first threaded hole on the whole machine 1, and passes through the second countersunk column 52 and the second mounting hole column 38 and is screwed and fixed to the second threaded hole on the whole machine 1; the first threaded hole and the second threaded hole are arranged on the end face of the whole machine 1, or a protrusion is arranged on the end face of the whole machine 1 to form the first threaded hole and the second threaded hole.

[0028] In this embodiment, the IGBT on the circuit board 4 is mounted on the mounting surfaces 32 of the first horizontal section 33 and the vertical section 35 , respectively, and the brake resistor is mounted on the mounting surface 32 of the second horizontal section 36 .

[0029] Compare with Figure 4 The present embodiment further optimizes the installation structure of the vertical heat sink 3 and the circuit board 4. A circuit board 4 installation stop 310 is provided on the side of the vertical heat sink 3 close to the rear cover 2. The circuit board 4 is reversely installed on the vertical heat sink 3. Three circuit board 4 installation holes 311 are provided in the installation stop 310. The circuit board 4 installation holes 311 are respectively located at the end of the first horizontal section 33 away from the inclined section 34, the end of the vertical section 35 away from the inclined section 34, and the inclined section 34.

[0030] In order to further improve the sealing performance of the electric control, the electric control housing 5 and the rear cover 2 are assembled into a compressed state and form a sealing structure of the vertical heat sink 3 respectively.

[0031] In order to completely prevent dust from entering, a dustproof baffle 53 is arranged in the electric control housing 5, and the arrangement direction of the dustproof baffle 53 is determined according to the wind direction.

[0032] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A closed electric control base structure for a sewing machine, comprising a complete machine (1), a rear cover (2), a vertical heat sink (3), a circuit board (4) and an electric control housing (5) arranged in sequence, wherein two sides of the vertical heat sink (3) respectively form a heat dissipation surface (31) and a mounting surface (32), characterized in that: The vertical heat sink (3) is arranged along the edge contour of the circuit board (4), and comprises a first horizontal section (33), an inclined section (34), a vertical section (35) and a second horizontal section (36) in sequence; the first horizontal section (33), the vertical section (35) and the second horizontal section (36) are all provided with mounting surfaces; the inclined section (34) is provided with a first mounting hole column (37); a second mounting hole column (38) is provided between the vertical section (35) and the second horizontal section (36); the first mounting hole column (37) and the second mounting hole column (38) are respectively fastened to the electric control housing (5) and the whole machine (1) through fasteners.

2. A closed electric control base plate structure for a sewing machine according to claim 1, characterized in that: A connecting plate (39) is provided on the inclined section (34), the connecting plate (39) is arranged perpendicular to the inclined section (34) and extends in the direction of the circuit board (4), the first mounting hole column (37) is arranged at the end of the connecting plate (39), and the circuit board (4) is provided with a through hole (41) for the first mounting hole column (37) to pass through.

3. A closed electric control base plate structure for a sewing machine according to claim 2, characterized in that: The inner side of the electric control housing (5) is provided with a first countersunk column (51) cooperating with the first mounting hole column (37) and a second countersunk column (52) cooperating with the second mounting hole column (38); the fastener passes through the first countersunk column (51) and the first mounting hole column (37) and is screwed and fixed to the first threaded hole on the whole machine (1); and passes through the second countersunk column (52) and the second mounting hole column (38) and is screwed and fixed to the second threaded hole on the whole machine (1).

4. A closed electric control base plate structure for a sewing machine according to claim 1, characterized in that: The IGBTs on the circuit board (4) are respectively mounted on mounting surfaces of the first horizontal section (33) and the vertical section (35), and the brake resistor is mounted on the mounting surface of the second horizontal section (36).

5. The closed electric control base plate structure of a sewing machine according to claim 1, characterized in that: A circuit board mounting stop (310) is provided on one side of the vertical heat sink (3) close to the rear cover (2); the circuit board (4) is mounted on the vertical heat sink (3) in reverse; three circuit board mounting holes (311) are provided in the mounting stop (310); the circuit board mounting holes (311) are respectively located at the end of the first horizontal section (33) away from the inclined section (34), the end of the vertical section (35) away from the inclined section (34), and the inclined section (34).

6. A closed electric control base plate structure for a sewing machine according to claim 1, characterized in that: The electric control housing (5) and the rear cover (2) are in a compressed state after being assembled, and respectively form a sealing structure of the vertical heat sink (3).

7. A closed electric control base plate structure for a sewing machine according to claim 1, characterized in that: A dustproof baffle (53) is arranged inside the electric control housing (5), and the arrangement direction of the dustproof baffle (53) is determined according to the wind direction.

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