CN211537566U - Fast-assembling quick-fetching mechanism and handheld stirring device with same - Google Patents

Fast-assembling quick-fetching mechanism and handheld stirring device with same Download PDF

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Publication number
CN211537566U
CN211537566U CN201921355023.9U CN201921355023U CN211537566U CN 211537566 U CN211537566 U CN 211537566U CN 201921355023 U CN201921355023 U CN 201921355023U CN 211537566 U CN211537566 U CN 211537566U
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China
Prior art keywords
semicircular ring
quick
section
movable fastener
elastic element
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CN201921355023.9U
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Chinese (zh)
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张育奇
王洪涛
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Liantek Electrical Appliances Shenzhen Co Ltd
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Shenzhen Lianchuang Sanjin Internet Of Things Technology Co Ltd
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Abstract

The utility model relates to a fast-assembling quick access mechanism and be equipped with this fast-assembling quick access mechanism's hand-held type agitating unit, include: the fixing seat is provided with a butt joint cavity which is communicated from front to back, the side wall of the fixing seat is provided with a sliding chute, and the front end of the fixing seat is provided with a first semicircular ring; the movable fastener is provided with a second semicircular ring matched with the first semicircular ring, and the second semicircular ring and the first semicircular ring are circular when closed; the first elastic element applies force to the movable fastener to close the second semicircular ring and the first semicircular ring; the pivot shaft is used for pivoting the movable fastener on the fixed seat; the sliding block is provided with a pushing part which is correspondingly arranged in the sliding groove and extends into the butt joint cavity; the second elastic element applies force to the sliding block to enable the sliding block to be in a set position; the push rod applies force to the movable fastener to enable the second semicircular ring and the first semicircular ring to be opened to a set degree; and a key for operating the push rod. The utility model discloses can implement the loading and unloading of stirring head safely swiftly.

Description

Fast-assembling quick-fetching mechanism and handheld stirring device with same
Technical Field
The utility model relates to a mechanism is got in dress of structure, in particular to mechanism is got in dress suitable for hand-held type agitating unit.
Background
The hand-held stirring device comprises a loading and unloading mechanism and a stirring head. The mechanism is got to current dress and stirring head matched with mode is various, and one kind is: the mechanism is got to dress includes threaded fixing base, and the link of stirring head is threaded also, and the stirring head is packed into through screwing in the link fixing base to through screwing out the link fixing base and take out. The other is as follows: the loading and unloading mechanism comprises a fixed seat with two keys, and the stirring head can be loaded and unloaded only by pressing the two keys simultaneously. The other one is: the loading and unloading mechanism comprises a fixed seat with a buckle position, and the stirring head is butted with the fixed seat through a buckle. The existing assembling and disassembling mechanisms can not safely and quickly assemble and disassemble the stirring head, and actually need to be improved.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, the utility model provides a fast mechanism is got fast to fast-assembling, can implement the loading and unloading of stirring head safely swiftly.
The utility model provides a technical scheme that its technical problem adopted includes: a fast-assembling quick-fetching mechanism is provided, which comprises: the fixing seat is provided with a butt joint cavity which is communicated from front to back, the side wall of the fixing seat is provided with a sliding chute, and the front end of the fixing seat is provided with a first semicircular ring;
the movable fastener is provided with a second semicircular ring matched with the first semicircular ring, and the second semicircular ring and the first semicircular ring are circular when closed;
the first elastic element is used for applying force to the movable fastener so as to close the second semicircular ring and the first semicircular ring;
the pivot shaft is used for pivoting the movable fastener on the fixed seat;
a sliding block which is provided with a pushing part, the pushing part is correspondingly arranged in the sliding chute and extends into the butt joint cavity;
the second elastic element is used for applying force to the sliding block so as to enable the sliding block to be in a set position;
the push rod is used for applying force to the movable fastener so as to enable the second semicircular ring and the first semicircular ring to be expanded to a set degree; and
and the key is used for operating the push rod.
In some embodiments, the aperture size of the second semi-circular ring when closed with the first semi-circular ring is smaller than the aperture size of the inner edge profile of the front end of the fixed seat; and the caliber size of the second semicircular ring and the first semicircular ring when the second semicircular ring and the first semicircular ring are opened to a set degree is not smaller than the caliber size of the inner edge outline of the front end of the fixed seat.
In some embodiments, the inner edge of the front end of the fixing seat is polygonal in outline.
In some embodiments, the first elastic element is a tension spring, and one end of the first elastic element is mounted on the upper end of the fixed seat, and the other end of the first elastic element is mounted on the upper end of the movable fastener.
In some embodiments, the second elastic element is a compression spring, and one end of the compression spring abuts against the sliding block.
In some embodiments, the pushing rod is provided with a finger portion for applying a force to the upper end of the movable fastener, and the finger portion is arc-shaped and matched with the peripheral contour of the fixed seat.
In some embodiments, the finger tip of the finger portion faces the upper end of the movable fastener, and the upper end of the movable fastener is provided with a tongue plate which is positioned above the finger tip of the finger portion.
In some embodiments, further comprising: the fixing seat is fixed on the shell through a fastener, and a structure matched with the second elastic piece is arranged on the shell.
The utility model provides a technical scheme that its technical problem adopted still includes: a handheld stirring device is provided, which comprises the fast-assembling and quick-taking mechanism and a stirring head loaded in/taken out from the front end of the fixed seat of the fast-assembling and quick-taking mechanism.
In some embodiments, the mixing head comprises a hub, a shaft, and a knife; the shaft sleeve is sequentially provided with a first section, a second section and a third section, wherein the first section is in a hollow cylindrical shape, the peripheral outline of the second section is polygonal, the third section is in a hollow cylindrical shape, the second section is the largest in terms of the caliber size of the outer outline, and the first section, the second section and the third section are the smallest.
Compared with the prior art, the utility model discloses a fast mechanism is got to fast, through fixing base, activity fastener, first elastic element, pivotal axis, slider, second elastic element, push rod and the ingenious cooperation between the button constitute, can implement the loading and unloading of stirring head safely swiftly.
Drawings
FIG. 1 is a schematic diagram of the fast-assembling and fast-fetching mechanism of the present invention.
Fig. 2 is a schematic view of the quick-mounting and quick-fetching mechanism of the present invention, wherein the movable fastener is in a closed position.
Fig. 3 is a schematic view of the quick-mounting and quick-fetching mechanism of the present invention, wherein the movable fastener is in an open position.
FIG. 4 is an exploded view of the quick-mount quick-access mechanism of the present invention, with the housing omitted.
Fig. 5 is a schematic view of the hand-held stirring device of the present invention, before the stirring head is put into place.
Fig. 6 is a schematic cross-sectional view of the hand-held stirring device of the present invention, before the stirring head is installed in place.
Fig. 7 is a schematic view of the hand-held stirring device of the present invention, with the stirring head installed in place.
Fig. 8 is a schematic cross-sectional view of the hand-held stirring device of the present invention, with the stirring head in place.
Fig. 9 is a schematic view of the hand-held stirring device of the present invention, with the stirring head being loaded/unloaded.
Fig. 10 is a schematic view of the hand-held stirring device of the present invention.
Wherein the reference numerals are as follows: 10 hand-held stirring device 2 quick-loading quick-fetching mechanism 21 fixing seat 211 positioning hole 212, sliding groove 213 positioning column 214 front end 216 rear end 217 positioning hook 219 abutting cavity 22 movable fastener 221 positioning hole 222 second semi-circular ring 223 positioning hole 224 tongue 23 first elastic element 24 pivoting shaft 241 pivoting part 242 fixed part 25 slide block 251 abutting part 252 positioning column 253 base part 26 second elastic element 27 pushing rod 271 positioning hole 272 finger part 273 base part 28 push button 29 shell 3 stirring head 32 shaft sleeve 321 first section 322 second section 323 third section 34 shaft 341 abutting head 36 knife.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the present invention is a schematic diagram of a fast-assembling and fast-fetching mechanism. The utility model provides a fast-assembling quick access mechanism 2, it includes: a fixed seat 21, a movable fastener 22, a first elastic element 23, a pivot shaft 24, a slide block 25, a second elastic element 26, a push rod 27, a key 28 and a shell 29.
The fixed base 21 is fixedly mounted on the housing 29 by a fastener such as a screw. The fixing seat 21 is provided with a butt joint cavity 219 which is through from front to back. The side wall of the fixing base 21 is provided with a sliding groove 212 at a position close to the rear end 216. The pushing portion 251 of the slider 25 is correspondingly disposed in the sliding groove 212 and extends into the docking cavity 219. The pivot shaft 24 is disposed in the positioning hole 211 of the fixing base 21 and the positioning hole 221 of the movable fastener 22 for pivotally connecting the movable fastener 22 to the fixing base 21. The movable fastener 22 is fastened to the front end of the fixed seat 21 and connected to the fixed seat 21 through a first elastic element 23.
Referring to fig. 2 and 3, fig. 2 is a schematic view of the quick-mount quick-access mechanism of the present invention, wherein the movable fastener is in a closed position. Fig. 3 is a schematic view of the quick-mounting and quick-fetching mechanism of the present invention, wherein the movable fastener is in an open position. The front end 215 of the fixed seat 21 is provided with a first semicircular ring 214. The inner edge of the front end 215 is polygonal (e.g., octagonal) in contour; referring back to fig. 1, the inner edge of the rear end 216 is rounded in profile. The movable fastener 22 is provided with a second semicircular ring 222.
Referring to fig. 2, when the movable fastener 22 is in the closed position, the first elastic member 23 is in a free state or a slightly stretched state, and the second semicircular ring 222 is closed with the first semicircular ring 214, that is, the upper end of the second semicircular ring 222 is in a fitted state or a state with a small gap with the upper end of the first semicircular ring 214. Second semi-circular ring 222 closes into a circle with first semi-circular ring 214.
Referring to fig. 3, when the movable fastener 22 is in the open position, the first elastic member 23 is in a large stretching state, and the second semi-circular ring 222 is open relative to the first semi-circular ring 214, that is, the upper end of the second semi-circular ring 222 is open to a set degree relative to the upper end of the first semi-circular ring 214. The force for overcoming the first elastic element 23 can be derived from an external force to press the button 28, so that the push rod 27 cooperating with the button 28 is actuated, and then the push rod 27 can apply a force to the movable fastener 22, so that the second semicircular ring 222 is expanded to a set degree relative to the first semicircular ring 214.
It is worth mentioning that the front end 215 and the rear end 216 of the holder 21 are different and can be well adapted to a docking member inserted into the docking cavity 219 from the front end 215, for example, a stirring head, which will be described in detail later; and another docking member inserted into the docking cavity 219 from the rear end 216, for example, this docking member is a drive mechanism, i.e., the drive mechanism and the agitator head dock within the docking cavity 219.
Referring to fig. 4, fig. 4 is an exploded view of the fast-assembling and fast-fetching mechanism of the present invention, omitting the housing. As can be seen, in the fixed seat 2, a positioning hook 217 is provided; in the movable fastener 22, a positioning hole 223 is provided. The two ends of the first elastic element 23 can connect the upper end of the movable fastener 22 with the upper end of the fixed seat 2 by respectively connecting the positioning hook 217 and the positioning hole 223. The movable buckle 22 is provided with a tongue portion 224 protruding toward the side where the first elastic member 23 is located.
The pivot shaft 24 is provided with a pivot portion 241 and a fixing portion 242. The pivot portion 241 is correspondingly received in the positioning hole 221 of the movable fastener 22. The fixing portion 242 is correspondingly disposed in the positioning hole 211 of the fixing base 21. Patterns or other structures are arranged on the outer surface of the fixing part 242, so that the fixing part 242 is difficult to rotate in the positioning hole 211; the appearance of the pivot portion 241 is smooth, so that the lower end of the movable buckle 22 can rotate relatively easily with respect to the lower end of the fixed seat 21.
The slider 25 includes, in addition to the pushing portion 251, a positioning post 252 for matching with the second elastic element 26 to position the second elastic element 26; and a base 253 for engaging with the housing 29 (for example, the housing 29 is provided with a sliding slot corresponding to the base 253), so as to be capable of moving forward and backward relative to the fixing base 21, wherein the maximum value of the set distance of the forward and backward movement is limited by the forward and backward dimension of the sliding slot 212.
It is worth mentioning that the portion of the pushing portion 251 that extends into the docking cavity 219 is limited to be able to be pushed by the structural portion of the mixing head inserted into the docking cavity 219 from the front end 215, and to not hinder the normal operation of the structural portion of the driving mechanism inserted into the docking cavity 219 from the rear end 216.
One end of the second elastic element 26 is sleeved on the positioning column 252 and abuts against the sliding block 25. Referring back to fig. 1, the other end of the second resilient element 26 abuts against a mating structure on the housing 29. That is, when the slider 25 slides backward by an external force, the second elastic member 26 can be compressed. Once the external force is released, the second elastic element 26 returns to the original position, and the slider 25 can be driven to slide forwards.
The push rod 27 comprises a positioning hole 271 for matching with the positioning post 213 on the fixing base 21; a finger portion 272 for applying a force to an upper end of the movable catch 22; and a base 273 for mating with the key 28.
The finger portion 272 has an arc shape and matches with the outer peripheral contour of the holder 21. The finger tip of the finger portion 272 faces the upper end of the movable catch 22 and is located below the tongue plate 224 at the upper end of the movable catch 22. It can be understood that the tongue plate 224 is located above the fingertips of the fingers 272, and can serve as a limiting function, which is beneficial to limit the fingers 272 from above to be attached to the periphery of the fixing base 21 as much as possible.
In the present embodiment, the first elastic element 23 is a tension spring, and the second elastic element 26 is a compression spring. In other embodiments, the first elastic element 23 may be a compression spring and the second elastic element 26 may be a tension spring.
In the present embodiment, the housing 29 is a structural component of the quick access mechanism 2. In other embodiments, the housing 29 may be omitted, such as: the structure integrated with the fixing base 21, such as: the function of the housing 29 is provided by other components associated with the quick access mechanism 2.
Referring to fig. 5 and 6, fig. 5 is a schematic view of the hand-held stirring device of the present invention, before the stirring head is installed in place. Fig. 6 is a schematic cross-sectional view of the hand-held stirring device of the present invention, before the stirring head is installed in place. The utility model provides a hand-held type agitating unit 10 with aforementioned fast mechanism 2 is got to fast dress, hand-held type agitating unit 10 still include with fast mechanism 2 matched with stirring head 3 is got to the fast dress, during stirring head 3 both can be fast by the front end of fixing base 21, the fast dress of packing into gets mechanism 2 fast, can also be fast by the front end of fixing base 21, get mechanism 2 from fast dress and get out.
The mixing head 3 comprises a hub 32, a shaft 34 and a knife 36. One end of the shaft 34 is provided with a connector 341 for coupling with a driving mechanism (not shown) so that the shaft 34 can be driven by the driving mechanism to rotate. A knife 36 is fixed to the other end of the shaft 24 and is rotatable with the rotation of the shaft 34 to cut the food to be processed.
The sleeve 32 is provided with a first section 321, a second section 322 and a third section 323 in this order. The first segment 321 is hollow cylinder and correspondingly surrounds the outer circumference of the abutment 341. The second segment 322 has a polygonal (e.g., octagonal) peripheral contour. The third section 323 is hollow cylindrical. The second section 322 is largest and the first section 321 is smallest in terms of the caliber size of the outer contour, the second and third sections 313.
Referring to fig. 5 and 6, when the mixing head 3 is loaded into the quick-loading cache mechanism 2, the first segment 321 of the shaft sleeve 32 of the mixing head 3 first enters the abutting cavity 219 of the fixed seat 21, and as the mixing head 3 is pushed in continuously, the top end of the first segment 321 will abut against the abutting part 251 of the slide block 25.
Referring to fig. 9, fig. 9 is a schematic view of the hand-held stirring device of the present invention, with the stirring head being loaded/unloaded. When the stirring head is pushed in, the top end of the first section 321 pushes the sliding block 25 to slide, so that the second elastic element 26 is compressed until the second section 322 of the shaft sleeve 32 of the stirring head 3 enters the fixed seat 21, and the movable fastener 22 can be spread through the cooperation between the second section 322 of the shaft sleeve 32 and the substantially closed second semicircular ring 222 and the first semicircular ring 214, so that the first elastic element 23 is spread.
Referring to fig. 7, 8 and 10, fig. 7 is a schematic view of the hand-held stirring device of the present invention with the stirring head in place. Fig. 8 is a schematic cross-sectional view of the hand-held stirring device of the present invention, with the stirring head in place. Fig. 10 is a schematic view of the hand-held stirring device of the present invention. The pushing-in is continued until the second section 322 of the shaft sleeve 32 is completely installed in the fixing base 21, the polygonal outer contour of the second section 322 matches with the polygonal inner edge of the front end 215 of the fixing base 21, the first elastic element 23 returns to the original position, and the substantially closed second semicircular ring 222 and the first semicircular ring 214 firmly lock the mixing head 3 in the docking cavity 219 of the fixing base 21.
It will be appreciated that the substantially closed second semi-circular ring 222 and the first semi-circular ring 214 enclose an arc having a caliber size slightly larger than the outer contour caliber size of the first section 321 of the shaft sleeve 32 and slightly smaller than the outer contour caliber size of the second section 322 of the shaft sleeve 32.
Referring back to fig. 5, 6 and 9, when the mixing head 3 is taken out from the quick-access mechanism 2, the button 28 is pressed, on one hand, the upper end of the movable fastener 22 is opened under the action of the finger 272 of the push rod 27, and the caliber size of the circular arc enclosed by the second semicircular ring 222 and the first semicircular ring 214 is larger than (theoretically, not smaller than the caliber size of the outer contour of the second section 322 of the shaft sleeve 32; on the other hand, the stirring head 3 can be ejected from the abutting cavity 219 of the fixing base 21 under the action of the resilience of the second elastic element 26.
Compared with the prior art, the utility model discloses a beneficial effect that fast mechanism 2 and be equipped with this fast mechanism 2 is got to fast hand-held type agitating unit 10 and is equipped with includes:
on the one hand, when the mixing head 3 needs to be loaded into the quick-mounting quick-access mechanism 2, the mixing head 3 will push the movable fastener 22 to open, and at the same time push the slide block 25 to compress the second elastic element 26, when the mixing head is assembled in place, the movable fastener 22 will automatically lock the mixing head 3 in the quick-mounting quick-access mechanism 2 due to the pulling force of the first elastic element 23 returning, and will generate a sound click (generated by the closing collision between the second semicircular ring 222 of the movable fastener 22 and the first semicircular ring 214 at the front end of the fixed seat 21, similar to the sound generated by the mechanical shutter action of the camera), so as to remind the assembly in place, and the loading operation is very convenient, safe and fast.
On the other hand, when the mixing head 3 needs to be taken out of the quick-access mechanism 2, the push button 28 is only slightly pressed, the push rod 27 pushes the movable fastener 22 to open, the slide block 25 pushes the mixing head 3 to automatically and safely exit the butt-joint cavity 219 under the action of the elastic force of the second elastic element 26, the user does not need to touch the mixing head 3 with a hand, and the taking-out operation is very convenient, safe and quick.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and that such modifications and substitutions are intended to be included within the scope of the appended claims.

Claims (10)

1. A fast cache mechanism (2), comprising:
the fixing seat (21) is provided with a butt joint cavity (219) which is communicated with the front and the back, the side wall of the fixing seat is provided with a sliding groove (212), and the front end (215) of the fixing seat is provided with a first semicircular ring (214);
the movable fastener (22) is provided with a second semicircular ring (222) matched with the first semicircular ring (214), and the second semicircular ring (222) and the first semicircular ring (214) are closed into a circular shape;
a first elastic element (23) for applying a force to the movable fastener (22) to close the second semicircular ring (222) and the first semicircular ring (214);
a pivot shaft (24) for pivoting the movable fastener (22) on the fixed seat (21);
a sliding block (25) provided with a pushing part (251), wherein the pushing part (251) is correspondingly arranged in the sliding groove (212) and extends into the butt-joint cavity (219);
the second elastic element (26) is used for applying force to the sliding block (25) so as to enable the sliding block (25) to be in a set position;
the push rod (27) is used for applying force to the movable fastener (22) so as to enable the second semicircular ring (222) to be expanded to a set degree relative to the first semicircular ring (214); and
a push button (28) for operating the push rod (27).
2. The quick-mount cache mechanism (2) of claim 1 wherein the aperture size of the second semi-circular ring (222) and the first semi-circular ring (214) when closed is smaller than the aperture size of the inner edge profile of the front end (215) of the anchor block (21); and the caliber size of the second semi-circular ring (222) is not less than the caliber size of the inner edge contour of the front end (215) of the fixed seat (21) when the second semi-circular ring (222) is expanded to a set degree relative to the first semi-circular ring (214).
3. The quick-install cache mechanism (2) as claimed in claim 1 wherein the inner edge of the front end (215) of the mounting base (21) is polygonal in profile.
4. The quick-install cache mechanism (2) as claimed in claim 1, wherein the first resilient element (23) is a tension spring having one end mounted on the upper end of the fixed seat (21) and the other end mounted on the upper end of the movable fastener (22).
5. The quick access mechanism (2) according to claim 1, wherein the second resilient element (26) is a compression spring having one end abutting against the slider (25).
6. The quick-install quick-access mechanism (2) according to claim 1, characterized in that the pushing rod (27) is provided with a finger portion (272) for applying a force to the upper end of the movable fastener (22), the finger portion (272) having a circular arc shape and matching with the peripheral contour of the fixed seat (21).
7. The quick-loading quick-access mechanism (2) according to claim 6, characterized in that the finger tip of the finger portion (272) faces the upper end of the movable catch (22), the upper end of the movable catch (22) is provided with a tongue plate (224), and the tongue plate (224) is positioned above the finger tip of the finger portion (272).
8. The quick cache (2) as claimed in any one of claims 1 to 7 further comprising: the fixed seat (21) is fixed on the shell (29) through a fastener, and a structure matched with the second elastic element (26) is arranged on the shell (29).
9. A hand-held stirring device (10) comprising a quick access mechanism (2) according to any one of claims 1 to 8 and a stirring head (3) which is loaded/unloaded from the front end of the holder (21) of the quick access mechanism (2).
10. Hand-held stirring device (10) according to claim 9, characterised in that the stirring head (3) comprises a shaft sleeve (32), a shaft (34) and a knife (36); the shaft sleeve (32) is sequentially provided with a first section (321), a second section (322) and a third section (323), wherein the first section (321) is in a hollow cylindrical shape, the peripheral outline of the second section (322) is polygonal, the third section (323) is in a hollow cylindrical shape, the second section (322) is the largest in terms of the caliber size of the outer contour, and the first section (321) is the second section and the third section (323) is the smallest.
CN201921355023.9U 2019-08-20 2019-08-20 Fast-assembling quick-fetching mechanism and handheld stirring device with same Active CN211537566U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921355023.9U CN211537566U (en) 2019-08-20 2019-08-20 Fast-assembling quick-fetching mechanism and handheld stirring device with same

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Application Number Priority Date Filing Date Title
CN201921355023.9U CN211537566U (en) 2019-08-20 2019-08-20 Fast-assembling quick-fetching mechanism and handheld stirring device with same

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112403362A (en) * 2019-08-20 2021-02-26 深圳市联创三金电器有限公司 Fast-assembling quick-fetching mechanism and handheld stirring device with same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112403362A (en) * 2019-08-20 2021-02-26 深圳市联创三金电器有限公司 Fast-assembling quick-fetching mechanism and handheld stirring device with same

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Effective date of registration: 20231229

Address after: Building 14, Building 101, Building 3, Lianchuang Science and Technology Park, No. 21 Bulan Road, Xialilang Community, Nanwan Street, Longgang District, Shenzhen City, Guangdong Province, 518000 (one photo multi site enterprise)

Patentee after: LIANCHUANG SANJIN ELECTRIC APPLIANCE (SHENZHEN) Co.,Ltd.

Address before: 518112 Room 101, 102, 2 / F, 3 / F, building 36, Lianchuang Science Park, 21 Bulan Road, xialilang community, Nanwan street, Longgang District, Shenzhen City, Guangdong Province

Patentee before: Shenzhen Lianchuang Sanjin Internet of things Technology Co.,Ltd.

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