Manually adjustable swing angle adjustment device based on electric fan markings

Abstract

The manually adjustable swing angle adjusting device based on the markings on a fan includes a sign board, an angle adjusting knob, a chute-slider crank adjusting mechanism, and a limiting groove-limiting block mechanism installed between the sign board and the angle adjusting knob, wherein a rack is formed on the inner wall of the second inner chamber of the slider, a graded concave-convex body is formed on the outer wall of the slider, the center distance of the graded concave-convex body is equal to the rack tooth distance, a notch is formed in the first limiting chute, a spring-fastening device is arranged in the notch to elastically fasten with the graded concave-convex body, an overlapping bump formed on the lower end surface of the slider slides into an extension chute formed on the edge of the second limiting chute of the limiting cover, and a buckle bump-through-hole engagement contact combination structure is installed between the angle adjusting knob and the two-way connecting block, thereby avoiding sweeping and allowing the angle to be accurately adjusted according to the markings on the sign board, and preventing the angle adjusting knob from loosening and coming loose.

Description

[Technical field]

[0001] The present invention relates to an electric fan device, and more particularly to a manually adjustable swing angle adjustment device based on an electric fan's mark. [Background technology]

[0002] In the prior art, the swing angle of an adjustable electric fan is adjusted mainly by changing the length of the crank in the crank rocker mechanism. Prior art 1, the technology of China Patent No. 99236154.0, discloses an electric fan swing angle adjustment device based on the quantitative markings, in which a limiting chute-slider rack crank is arranged in the large gear and meshed with the core shaft gear to form a variable length crank mechanism, a large circle wheel with a dial is connected to a hollow shaft extending from the motor enclosure, an angle adjustment knob is connected to the core shaft extending from the motor enclosure, and an elastic clamping contact device is installed between the angle adjustment knob and the large circle wheel, and the user can rotate the angle adjustment knob according to the markings on the dial of the large circle wheel, so that the slider rack crank is driven to be displaced equally long according to the markings, and a desired angle of the swing angle of the blowing air can be obtained. However, the reciprocating variable length crank mechanism, which is configured by arranging a limiting chute-slider rack crank inside the large gear and meshing with the core gear, is an internal limit-type blocking structure in which the blocking surface of the limiting end is installed at both ends of the reciprocating motion of the chute, and once the user turns the angle adjustment knob in the wrong direction or with too much force, the core gear and rack will hit the blocking surface of the limiting end and be blocked, generating an overshoot moment, causing a "sweep" phenomenon and failing to adjust the angle. In addition, the assembly structure in which "there is a shaped hole inside the large ring, there is a spring device inside the shaped hole, and the spring device is assembled so that it elastically fits closely to the uneven body of the angle adjustment knob" is a spare part-type secondary assembly production technology that leaves the spare parts of the spring on the overall assembly line of the fan and allows the spring to be installed after the motor enclosure is installed, which has the disadvantage of clearly violating the safety regulations and industry regulations of the fan manufacturing industry.

[0003] In response to the above shortcomings, the technology of Chinese patent application No. 202011159133.5 of prior art 2 discloses a manually adjustable swing angle adjustment device based on the bidirectional grade markings of an electric fan, in which a rotary variable crank structure consisting of an eccentric gear disk crank-center (shaft) gear, which can rotate 360 ​​degrees in both directions without interruption, is installed in the inner chamber of a large gear, and a sign board relay connection device, which has a starting point reference, is uniquely positioned, and can be attached and detached freehand, is installed between the hollow shaft and the sign board, and the starting point is positioned, and the sign board can be rotated 360 degrees in both directions without interruption and can be attached freehand. A removable angle adjustment knob relay connection device is installed between the central shaft and the angle adjustment knob, thereby forming a bidirectional grade-marker-based manual adjustment swing angle adjustment device that can change the eccentric distance displacement length of the eccentric gear disk crank in a bidirectional 360-degree uninterrupted rotational manner according to the bidirectional grade mark, which not only solves the sweep phenomenon of the slider rack and the central shaft gear in the prior art 1, but also ensures that the mark plate and the angle adjustment knob are in compliance with the industry regulations and are completed assembling reliably, so that the user can quickly and reliably adjust the angle according to the bidirectional grade mark on the mark plate outside the fan. However, the eccentric distance displacement length locus of the rotary crank generated by the central (shaft) gear rotating and driving the eccentric gear disk crank and the angular displacement locus of the central shaft of the angle adjustment knob relative to the average value mark on the mark plate are nonlinear functional displacement relationships, and when the angle adjustment knob is rotated when it is located at the inflection point mark on the mark plate or approaches the zero mark, the change in the rotary eccentric distance displacement length caused by driving the eccentric gear crank is small. On the contrary, the closer the angle adjustment knob is to the zero point of the indicator plate or the closer it is to the middle mark of the inflection point, the greater the change in the displacement length of the rotary eccentric distance caused by driving the eccentric gear crank. Obviously, the change in the displacement length of the rotary crank eccentric distance caused by the central (shaft) gear rotating the eccentric gear disk crank 360 degrees has a displacement difference that is not equal to the average value mark indicated by the marks of each grade on the indicator plate, which makes it easy for users to misunderstand and deviate from the specified value during operation, resulting in inaccurate angle adjustment. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem to be solved by the present invention is to provide a manually adjustable swing angle adjustment device based on the mark of a fan, which can not only avoid sweeping during the manually adjustable angle adjustment process, but also adjust the angle accurately and equally according to the mark on the sign board. [Means for solving the problem]

[0005] In order to solve the above technical problems, the manually adjustable swing angle adjustment device based on the sign of the electric fan of the present invention includes a motor enclosure, a sign board, an angle adjustment knob, a housing formed with a worm bush and a lower bush, a housing cover formed with an upper bush, a two-stage reduction mechanism, a hollow shaft, and a central shaft. The second-stage reduction mechanism has a worm gear and a large gear, and a first inner chamber is provided in the large gear, and a crank adjustment mechanism consisting of a first limiting chute-slider rack crank and a central gear is provided in the first inner chamber. The sign board is provided with a displacement angle of the sign angle of each grade of the grade sign, and the displacement angle is equal to the displacement angle of each tooth angle of the central gear. A circular overlap staircase is formed at the upper end of the hollow shaft, and a sign board relay connection device with unique positioning connection is provided between the sign board, and a unique positioning connection angle adjustment knob relay connection device is provided between the central shaft and the angle adjustment knob, and the angle adjustment knob relay connection device is configured by screwing a two-way connection block to the upper end of the central shaft. The lower end of the large gear has a limiting cover, a second limiting chute is formed on the limiting cover, and the crank goes out of the large gear through the second limiting chute. A limiting groove-limiting block mechanism is provided between the sign board and the angle adjustment knob. In the limiting groove-limiting block mechanism, an arc-shaped limiting groove is formed on the sign board, a limiting block is formed on the angle adjustment knob, and the limiting block is inserted into the limiting groove. The preset limiting stroke of the limiting groove is equal to the effective limiting stroke of the preset sign on the sign board.

[0006] Instead of the full rotation non-interruption mechanism between the angle adjusting knob and the sign board in the prior art, an internal limit type interruption mechanism with a predetermined limit stroke is configured by adding a limit groove-limit block mechanism between the sign board and the angle adjusting knob. If, during angle adjustment, the user applies too much force to rotate the angle adjusting knob or the direction is reversed due to incorrect operation, when the central gear and slider rack at the lower end of the central shaft are about to hit the limit surface at the limit end of the first limit chute, the limit block of the angle adjusting knob at the torque input end will first firmly block the angle adjusting knob against the specified limit end surface of the limit groove of the sign board, stopping the angle adjusting knob, and at the same time preventing the overshoot movement displacement of the central shaft and the central gear and slider rack at the lower end of the hollow shaft, thereby thoroughly eliminating the sweep phenomenon caused by too much force to rotate the angle adjusting knob by hand or incorrect operation in structural installation.

[0007] A second inner chamber is formed in the slider, a rack is formed on the inner wall of the second inner chamber, and a central gear is inserted into the second inner chamber to mesh with the rack. A graded irregular body is formed on the outer wall of the slider, and the center distance of the graded irregular body is equal to the rack tooth distance. The tip of the graded irregular body slides into the groove wall of the first limiting chute. A notch is formed in the groove wall of the first limiting chute. A fastener of the spring-fastening device is disposed in the first inner chamber of the large gear so as to pass through the notch and come into elastically fastening contact with the graded irregular body. The fastener is a fastener having one end as a first arc-shaped ridge and the other end as a square block. The first arc-shaped ridge of the fastener comes into elastically fastening contact with the graded irregular body through the notch.

[0008] A row of graded uneven bodies whose center distance is equal to the rack tooth distance is added to the outer wall of the slider, the middle of the normal groove wall of the first limiting chute is broken to form a notch, and an elastic fastening device is added to the position of the notch to press the graded uneven body in an elastic fastening contact manner. Thus, the slider rack crank is restricted to only be set and displaced in the first limiting chute according to the set center distance of the graded uneven body, and a slider rack reciprocating crank variable length adjustment mechanism is formed, which limits the displacement trajectory with the graded uneven body. Since the center distance of the graded uneven body is equal to the slider rack tooth distance, and the slider rack tooth distance is equal to the central gear tooth distance, the displacement angle of each tooth angle of the central gear is equal to the displacement angle of the grade mark angle of each grade on the sign board. Therefore, a manual adjustment type swing angle adjustment device based on the electric fan mark is formed, which adjusts the actual displacement length of the eccentric distance of the slider rack crank to exactly the same amount according to the predetermined grade mark on the sign board.

[0009] An overlap bump is formed between the lower end surface of the slider and the crank, and an extension chute is formed on the limit cover along the second limit chute. The overlap bump slides into the extension chute. By adding an overlap bump between the lower end surface of the slider and the crank, adding an extension chute along the second limit chute to the limit cover, and sliding the overlap bump into the extension chute, the slider rack crank length adjustment mechanism forms a linear guide sliding fit mechanism with a single slider two-plane double chute consisting of the first limit chute-slider and the extension chute-overlap bump, which strengthens the vertical stability of the sliding fit of the crank, reduces the effect of the lateral torque of the central gear during angle adjustment, and increases the impact resistance of the crank against external force collision.

[0010] In the second-stage reduction mechanism, further, an arc reinforcing bush is formed along the non-engagement part of the tooth crest of the worm gear in the lower wall of the worm bush of the housing, and the arc reinforcing bush is in a moving engagement state with the tooth crest of the worm gear corresponding thereto. In this way, the meshing stability between the worm gear and the large gear is enhanced, and the problem that the distal end of the worm gear is in a cantilever shape at one end to mesh with the large gear, which is low in stability, and the meshing is unstable and prone to slip during the manual angle adjustment process is solved, and the whole sign-based manual adjustment type swing angle adjustment device always maintains good power transmission performance and smooth and accurate angle adjustment function during operation.

[0011] As a preferred configuration of the angle adjustment knob relay connection device, the shaft of the angle adjustment knob is formed with a symmetric groove and an asymmetric groove, a through hole is formed on the shaft of the symmetric groove, a symmetric convex stripe and an asymmetric convex stripe are formed on the cylinder of the bidirectional connection block, and a buckle bump is formed at a position corresponding to the through hole of the symmetric convex stripe, and during relay installation, the buckle bump is inserted into the through hole to form an engagement contact between the buckle bump and the through hole. By adding a combination structure with engagement contact between the buckle bump and the through hole between the angle adjustment knob and the bidirectional connection block, during relay installation in the overall assembly pipeline of the electric fan factory, the through hole of the shaft of the angle adjustment knob can be passed through the motor enclosure and accurately and reliably inserted into the buckle bump of the bidirectional connection block in a unique predetermined position manner to form an engagement relay connection. Meanwhile, after the relay installation of the angle adjustment knob is completed and shipped, the problem of poor installation of the forward insertion structure, in which the angle adjustment knob loosens and comes out during transportation and during daily use in which the user repeatedly rotates the angle adjustment knob, can be solved. This allows the device to be configured to comply with safety regulations and industry rules in the electric fan industry, and also to provide a manually adjustable swing angle adjustment device based on the markings of the electric fan, which ensures that the angle adjustment knob will not come loose and fall off during daily use.

[0012] As a further improvement of the preferred configuration of the angle adjustment knob relay connection device, the asymmetric grooves are asymmetric grooves that are offset from each other along the circumferential direction of the symmetric grooves, one of which is a rectangular groove and the other is a circular arc groove. The asymmetric ridges are asymmetric ridges that are offset from each other along the circumferential direction of the symmetric ridges, one of which is a rectangular ridge and the other is a second circular arc ridge. The longitudinal lengths of the asymmetric rectangular ridges and the second circular arc ridge are longer than the longitudinal length of the symmetric ridge. Since the longitudinal lengths of the asymmetrical square convex stripe and the second arc-shaped convex stripe are longer than the longitudinal length of the symmetrical convex stripe, in the intermediate insertion and installation process of the angle adjustment knob, the assembler first inserts the asymmetrical square groove and arc-shaped groove of the shaft of the angle adjustment knob into the asymmetrical square convex stripe and the second arc-shaped convex stripe which have a relatively longer length on the cylinder of the bidirectional connection block in a unique alignment direction and a first predetermined position preferential introduction manner, and then in the subsequent pressing process, it further penetrates the symmetrical groove and is pressed into the buckle bump of the symmetrical convex stripe which has a shorter length on the cylinder of the bidirectional connection block in a second predetermined position manner, and then its plastic repulsion is inserted into the through hole to achieve buckle bump-through hole engagement contact. For such a bidirectional connecting block, the length of the asymmetric convex strip is relatively long, and the first predetermined position priority relay installation method is ensured, so that the drawback that the elastic deformation of the buckle bump of the bidirectional connecting block is easily biased when inserted can be avoided, the unique relay installation efficiency of the angle adjustment knob is significantly improved, and it is in compliance with the installation operation regulations in the electric fan industry, which has been practically proven. [Brief description of the drawings]

[0013] The above-mentioned advantages of the present invention will become more apparent and understandable from the following description of the embodiments using the accompanying drawings.

[0014] [Figure 1] FIG. 2 is a plan view showing the overall installation of one embodiment of a manually adjustable swing angle adjustment device based on the electric fan sign of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of the embodiment of FIG. [Diagram 3] FIG. 2 is an exploded view of the variable angle gearbox assembly, the indicator panel, and the angle adjustment knob in the embodiment of FIG. 1. [Figure 4] 4 is a top exploded view of the angle adjustment member in FIG. 3. [Diagram 5] 4 is an exploded bottom view of the angle adjustment member in FIG. 3. [Figure 6] FIG. 2 is an external view of the variable angle gearbox assembly, the indicator panel, and the angle adjustment knob in the embodiment of FIG. 1. [Figure 7] FIG. 2 is an exploded right view of the angle adjustment knob and the bidirectional connection block in the embodiment of FIG. 1. [Figure 8] FIG. 2 is an exploded external view of an angle adjustment knob and a bidirectional connection block in the embodiment of FIG. 1. [Figure 9] FIG. 2 is a rear view of the variable angle gearbox assembly of the embodiment of FIG. 1. [Figure 10] FIG. 10 is a cross-sectional view taken along line HH in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment of the present invention will now be described in detail with reference to FIGS.

[0016] The present invention relates to a manually adjustable swing angle adjustment device based on the markings of an electric fan.

[0017] Other configurations and operations of the electric fan are known to those skilled in the art and will not be described in detail here, but the following describes the configuration of a manually adjustable swing angle adjustment device based on the markings of the electric fan.

[0018] 1 to 6, the manually adjustable swing angle adjustment device based on the electric fan sign of the present invention includes a motor enclosure 3, a sign board 1, an angle adjustment knob 2, a housing 9 in which a worm bush 33 and a lower bush 19 are formed, a housing cover 8 in which an upper bush 7 is formed, a two-stage reduction mechanism, a hollow shaft 6, and a central shaft 5. The second-stage reduction mechanism has a worm gear 31 and a large gear 10, and the large gear 10 is provided with a first inner chamber 12, and the first inner chamber 12 is provided with a crank adjustment mechanism consisting of a first limiting chute 11-slider 17-rack 18-crank 14 and a central gear 13. The sign board 1 is provided with a displacement angle of the sign angle of each grade of the grade sign, and the displacement angle is equal to the displacement angle of each tooth angle of the central gear 13. At the upper end of the hollow shaft 6, a circular overlapping step 20 is formed, which is provided with a sign board relay connection device with unique positioning connection between the sign board 1 and the hollow shaft 6, and between the central shaft 5 and the angle adjustment knob 2, a unique positioning connection angle adjustment knob relay connection device is provided, which is configured by driving a two-way connection block 4 into the upper end of the central shaft and fixing it with a screw 21. The lower end of the large gear 10 has a limiting cover 15, and a second limiting chute 16 is formed in the limiting cover 15, and the crank 14 goes out of the large gear 10 through the second limiting chute 16. A limiting groove 22-limiting block 23 mechanism is provided between the sign board 1 and the angle adjustment knob 2. In the limiting groove 22-limiting block 23 mechanism, a circular arc-shaped limiting groove 22 is formed in the sign board 1, a limiting block 23 is formed in the angle adjustment knob 2, and the limiting block 23 is inserted into the limiting groove 22. The default limiting stroke of the limiting groove 22 is equal to the effective limiting stroke of the default sign of the sign board 1.

[0019] Instead of the full rotation non-interruption mechanism between the angle adjusting knob and sign board in the prior art, an internal limit type interruption mechanism with a predetermined limit stroke is configured by adding a limit groove 22-limit block 23 mechanism between the sign board 1 and the angle adjusting knob 2. If, during angle adjustment, the user applies too much force to rotate the angle adjusting knob 2 or the direction is reversed due to incorrect operation, when the central gear 13 and slider 17 rack 18 at the lower end of the central shaft 5 are about to hit the limiting surface of the limiting end of the first limiting chute 11, the limit block 23 of the angle adjusting knob 2 at the torque input end will first firmly interrupt the angle adjusting knob 2 against the specified limiting end surface of the limit groove 22 of the sign board 1, stopping the angle adjusting knob 2, and at the same time preventing the overshooting movement displacement of the central gear 13 and slider 17 rack 18 at the lower end of the central shaft 5 and the hollow shaft 6, thereby thoroughly eliminating the sweep phenomenon caused by the central gear 13 and slider 17 rack 18 applying too much force to rotate the angle adjusting knob 2 by hand or due to incorrect operation in the structural installation.

[0020] 2, 3, 4, 5 and 10, the slider 17 is formed with a second inner chamber 28, the inner wall of the second inner chamber 28 is formed with a rack 18, and the central gear 13 is inserted into the second inner chamber 28 to mesh with the rack 18. The outer wall of the slider 17 is formed with a graded uneven body 26, and the center distance of the graded uneven body 26 is equal to the tooth distance of the rack 18. The tip of the graded uneven body 26 slides into the groove wall of the first limiting chute 11. The groove wall of the first limiting chute 11 is formed with a notch 30. In the first inner chamber 12 of the large gear 10, the first arc-shaped convex strip 25 fastener of the spring 24-first arc-shaped convex strip 25 fastener device is arranged to pass through the notch 30 and come into elastic fastening contact with the graded uneven body 26.

[0021] A row of graded uneven bodies 26, the center distance of which is equal to the rack 18 tooth distance, is added to the outer wall of the slider 17, breaking the middle of the normal groove wall of the first limiting chute 11 to form a notch 30, and an elastic fastening device is added at the position of the notch 30 to press the graded uneven body 26 in an elastic fastening contact manner. Thus, the slider 17 rack 18 crank 14 is restricted to only be set and displaced in the first limiting chute 11 according to the set center distance of the graded uneven body 26, forming a slider 17 rack 18 reciprocating crank variable length adjustment mechanism that limits the displacement trajectory with the graded uneven body 26. Since the center distance of the graded uneven body 26 is equal to the slider 17 rack 18 tooth distance, and the slider 17 rack 18 tooth distance is equal to the central gear 13 tooth distance, the displacement angle of each tooth angle of the central gear 13 is equal to the displacement angle of the graded sign angle of each grade of the sign board 1. Therefore, a manually adjustable swing angle adjustment device based on the mark of the fan is configured, which adjusts the actual displacement length of the eccentric distance of the slider 17, rack 18 and crank 14 to an exactly equal amount according to the predetermined grade mark of the sign board, and has the advantages of a compact and reasonable structure and compliance with the safety regulations and industry regulations of the fan industry.

[0022] An overlap bump 27 is formed between the lower end surface of the slider 17 and the crank 14, and an extension chute 29 is formed in the limiting cover 15 along the second limiting chute 16. The overlap bump 27 slides into the extension chute 29 and fits into it. The limiting cover 15 is attached to the large gear 10 to seal the first inner chamber 12. An overlap bump 27 is added between the lower end surface of the slider 17 and the crank 14, an extension chute 29 is added along the second limit chute 16 on the limit cover 15, and the overlap bump 27 is inserted into the extension chute 29 for sliding engagement. In this way, the length adjustment mechanism of the slider 17, rack 18 and crank 14 forms a linear guide sliding engagement mechanism with a single slider, two-plane, double chute, which is composed of the first limit chute 11-slider 17 and the extension chute 29-overlap bump 27, which enhances the vertical stability of the sliding engagement of the crank 14, reduces the influence of the lateral torque of the central gear 13 during angle adjustment, enhances the impact resistance of the crank 14 against external force collision, and reliably ensures that the rack 18 and the central gear 13 will not sweep even if the crank 14 is subjected to an excessive load of external force impact.

[0023] 2, 3, 6, 9 and 10, an arc reinforcing bush 32 is formed in the lower wall of the worm bush 33 of the housing 9 along the non-engagement part of the tooth crest circle surface of the worm gear 31, and the arc surface of the arc reinforcing bush 32 is in a moving engagement state with the tooth crest circle surface corresponding to the worm gear 31. In this way, the meshing stability of the worm gear 31 and the large gear 10 is enhanced, and the problem that the distal end of the worm gear 31 is in a cantilever shape at one end to mesh with the large gear 10, which is low in stability, and the meshing is unstable and prone to slip during the manual angle adjustment process is solved, and the whole sign-based manually adjustable swing angle adjustment device always maintains good power transmission performance and smooth and accurate angle adjustment function during operation.

[0024] 2, 3, 4, 7 and 8, in the angle adjusting knob 2 intermediate connection device, a symmetrical groove 36 and an asymmetrical groove are formed on the shaft of the angle adjusting knob 2, a through hole 34 is formed on the shaft of the symmetrical groove 36, a symmetrical ridge 39 and an asymmetrical ridge are formed on the cylinder of the bidirectional connection block 4, and a buckle bump 35 is formed at a position corresponding to the through hole of the symmetrical ridge 39, and during intermediate installation, the buckle bump 35 is inserted into the through hole 34 to make an engaging contact with the buckle bump 35-through hole 34. By adding a combination structure with an engaging contact of the buckle bump 35-through hole 34 between the angle adjusting knob and the bidirectional connection block, during intermediate installation in the total assembly pipeline of the electric fan factory, the through hole 34 of the shaft of the angle adjusting knob 2 can be passed through the motor enclosure 3 and accurately and reliably inserted into the buckle bump 35 of the bidirectional connection block 4 in a unique predetermined position manner to make an engaging intermediate connection. On the other hand, after the intermediate installation of the angle adjustment knob is completed and the product is shipped, the problem of poor installation of the forward insertion structure, where the angle adjustment knob loosens and comes off during transportation or during daily use when the user repeatedly rotates the angle adjustment knob, can be solved. This allows the device to comply with safety regulations and related industry rules within the fan industry, and also forms a manually adjustable swing angle adjustment device based on the markings of the fan, which ensures that the angle adjustment knob 2 does not loosen and come off during daily use.

[0025] The asymmetric grooves are asymmetric grooves that are shifted by 90 degrees from each other along the circumferential direction of the symmetric groove 36, one being a square groove 37 and the other being a circular arc groove 38. The asymmetric ridges are asymmetric ridges that are shifted by 90 degrees from each other along the circumferential direction of the symmetric ridge 39, one being a square ridge 40 and the other being a second circular arc ridge 41. The longitudinal lengths of the asymmetric square ridge 40 and the second circular arc ridge 41 are longer than the longitudinal length of the symmetric ridge 39. Since the longitudinal length of the asymmetrical square convex strip 40 and the second arc-shaped convex strip 41 is longer than the longitudinal length of the symmetrical convex strip 39, in the intermediate insertion and installation process of the angle adjustment knob 2, the assembler first inserts the asymmetrical square groove 37 and the arc-shaped groove 38 of the axis of the angle adjustment knob 2 into the asymmetrical square convex strip 40 and the second arc-shaped convex strip 41, which have a relatively long cylindrical body of the bidirectional connection block 4, in a unique alignment direction and a first predetermined position preferential introduction method, and then in the subsequent pressing process, the asymmetrical groove 36 is further penetrated and pressed into the buckle bump 35 of the symmetrical convex strip 39, which has a relatively short cylindrical body of the bidirectional connection block 4, in a second predetermined position method, and the plasticity is rebounded and inserted into the through hole 34 to come into engagement contact with the buckle bump 35 and the through hole 34. It has been practically proven that such a bidirectional connection block 4 has a relatively long asymmetric convex strip and ensures the first predetermined position priority relay installation method, thereby avoiding the disadvantage that the elastic deformation of the buckle bump 35 of the bidirectional connection block 4 is prone to biased insertion, significantly improving the unique relay installation efficiency of the angle adjustment knob 2, and further complying with the installation operation regulations in the electric fan industry.

[0026] To sum up, the manually adjustable swing angle adjustment device based on the electric fan mark proposed by the present invention has the following beneficial meanings: 1. A limiting groove 22-limiting block 23 mechanism has been added between the sign board 1 and the angle adjustment knob 2, eliminating the sweep phenomenon when the user operates it. 2. Through the optimization design of the slider 17 member, the rack 18 on the inner wall of the second inner chamber 28, the grade uneven body 26 on the outer wall, the overlap bump 27, the crank 14 and other mechanical member elements are integrated and integrated to form a mechanical MCU element. It can perform the input of the preset value equally according to the average value mark of the sign board 1, and can drive the rack 18 and the crank 14 to displace the eccentric distance equally according to the preset value, and also feed back the sampling value equally according to the predetermined memory data after the angle adjustment of the crank 14. This three-in-one MCU component function solves the three equal requirements of the manual adjustment operation of equal input, equal drive and equal control according to the average value mark of the sign board 1, and reliably realizes the purpose of accurately adjusting the angle equally according to the mark of the sign board 1. 3. In terms of cost, the multi-functional components such as the inner wall rack 18 of the second inner chamber 28 of the slider 17, the outer wall grade uneven body 26, the overlap bump 27, and the crank 14 are integrated and produced as a single part, the combination structure of the notch 30 of the first limiting chute 11 and the spring 24-first arc-shaped convex strip 25 is optimized, the axial rivet is eliminated, the assembly technology is simplified, the material cost is reduced, and the overall cost performance is optimized by accurately adjusting the angle to the same amount according to the sign of the sign board 1. 4. For daily use, an engagement contact combination mechanism of the buckle bump 35-through hole 34 is added between the angle adjustment knob 2 and the two-way connection block 4, which effectively solves the problem that the angle adjustment knob 2 of the fan becomes loose and cannot be released during daily use.

[0027] Of course, in the manually adjustable swing angle adjustment device based on the electric fan mark of the present invention, the specific shape of the fastener of the spring-fastener device arranged between the graded uneven body and the inner chamber of the large gear is not limited to the first arc-shaped convex strip shown in the above embodiment, and may be a fastener of other suitable shapes, and such local transformation of the specific shape of the fastener is within the protection scope of the present invention. Obviously, the above embodiment is only a part of the present invention, not all of the embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative labor belong to the protection scope of the present invention.

[0028] (Additional Note) (Appendix 1) The motor enclosure includes a sign board, an angle adjustment knob, a housing in which a worm bush and a lower bush are formed, a housing cover in which an upper bush is formed, a two-stage reduction mechanism, a hollow shaft, and a central shaft. The second-stage reduction mechanism has a worm gear and a large gear, the large gear is provided with a first inner chamber, the first inner chamber is provided with a crank adjustment mechanism consisting of a first limiting chute-slider rack crank and a central gear, the marking board is provided with a displacement angle of the marking angle of each grade of the grade mark, and the displacement angle is equal to the displacement angle of each tooth angle of the central gear; A circular overlapping step is formed at the upper end of the hollow shaft, and a sign board relay connection device with a unique positioning connection is provided between the sign board and the hollow shaft. An angle adjustment knob relay connection device with a unique positioning connection is provided between the central shaft and the angle adjustment knob. The angle adjustment knob relay connection device is configured by fastening a two-way connection block to the upper end of the central shaft by screwing. A restricting cover is provided at the lower end of the large gear, and a second restricting chute is formed in the restricting cover, and the crank passes through the second restricting chute and exits the large gear. A limiting groove-limiting block mechanism is provided between the sign board and the angle adjustment knob. Manually adjustable swing angle adjustment device based on electric fan sign.

[0029] (Appendix 2) The limiting groove-limiting block mechanism is characterized in that an arc-shaped limiting groove is formed on the sign board, a limiting block is formed on the angle adjustment knob, and the limiting block is inserted into the limiting groove. A manually adjustable swing angle adjustment device based on the electric fan markings described in Appendix 1.

[0030] (Appendix 3) The slider is formed with a second inner chamber, a rack is formed on the inner wall of the second inner chamber, a central gear is inserted into the second inner chamber and meshes with the rack, a graded uneven body is formed on the outer wall of the slider, the center distance of the graded uneven body is equal to the rack tooth distance, the tip of the graded uneven body slides into the groove wall of the first limiting chute, a notch is formed on the groove wall of the first limiting chute, and the fastener of the spring-fastening device is disposed in the first inner chamber of the large gear so as to pass through the notch and come into elastic fastening contact with the graded uneven body. A manually adjustable swing angle adjustment device based on the electric fan markings described in Appendix 1.

[0031] (Appendix 4) The fastener has one end having a first arc-shaped protrusion and the other end having a square block, and the first arc-shaped protrusion of the fastener passes through a notch and elastically contacts with the graded uneven body. A manually adjustable swing angle adjustment device based on the electric fan markings described in Appendix 3.

[0032] (Appendix 5) An overlap bump is formed between the lower end surface of the slider and the crank, and an extension chute is formed on the limiting cover along the second limiting chute, and the overlap bump slides into the extension chute. A manually adjustable swing angle adjustment device based on the electric fan markings described in Appendix 1.

[0033] (Appendix 6) a reinforcing bush is formed in a lower wall of the worm bush of the housing along a non-engagement portion of the tooth crest surface of the worm gear, and the reinforcing bush has an arcuate surface that is in a movable engagement with the tooth crest surface of the worm gear. A manually adjustable swing angle adjustment device based on the electric fan markings described in Appendix 1.

[0034] (Appendix 7) A symmetrical groove and an asymmetrical groove are formed on the shaft of the angle adjustment knob, a through hole is formed on the shaft of the symmetrical groove, a symmetrical protrusion and an asymmetrical protrusion are formed on the cylinder of the two-way connection block, and a buckle bump is formed at a position corresponding to the through hole of the symmetrical protrusion, and the buckle bump is inserted into the through hole to make an engagement contact between the buckle bump and the through hole. A manually adjustable swing angle adjustment device based on the electric fan markings described in Appendix 1.

[0035] (Appendix 8) The asymmetric grooves are asymmetric grooves that are offset from each other in the circumferential direction of the symmetric grooves, one of which is a rectangular groove and the other is an arc-shaped groove, The asymmetrically shaped convex stripes are asymmetrically shaped convex stripes that are offset from each other in the circumferential direction of the symmetrically shaped convex stripe, one of which is a rectangular convex stripe and the other is a second arc-shaped convex stripe, The longitudinal length of the asymmetric rectangular convex stripe and the second arc-shaped convex stripe is longer than the longitudinal length of the symmetrical convex stripe. A manually adjustable swing angle adjustment device based on the electric fan markings described in Appendix 7. [Explanation of symbols]

[0036] 1: Identification board, 2: Angle adjustment knob, 3: Motor enclosure, 4: Two-way connection block, 5: Central shaft, 6: Hollow shaft, 7: Upper bush, 8: Housing cover, 9: Housing, 10: Large gear, 11: First limit chute, 12: First inner chamber, 13: Central gear, 14: Crank, 15: Limit cover, 16: Second limit chute, 17: Slider, 18: Rack, 19: Lower bush, 20: Circular overlap staircase, 21: Screw, 22: limit groove, 23: limit block, 24: spring, 25: first arc-shaped ridge, 26: graded uneven body, 27: overlap bump, 28: second inner chamber, 29: extension chute, 30: notch, 31: worm gear, 32: arc reinforcing bush, 33: worm bush, 34: through hole, 35: buckle bump, 36: symmetrical groove, 37: square groove, 38: arc-shaped groove, 39: symmetrical ridge, 40: square ridge, 41: second arc-shaped ridge.

Claims

1. The motor includes a motor enclosure, a sign board, an angle adjustment knob, a housing in which a worm bush and a lower bush are formed, a housing cover in which an upper bush is formed, a two-stage reduction mechanism, a hollow shaft, and a central shaft inserted into the hollow shaft; The two-stage reduction mechanism has a worm gear and a large gear, the large gear is provided with a first inner chamber, the first inner chamber is provided with a crank adjustment mechanism including a first limiting chute, a slider inserted into the first limiting chute, a rack formed inside the slider, a crank connected to the lower end of the slider, and a central gear formed at the lower end of the central shaft and meshing with the rack, the sign board is provided with a displacement angle of the sign angle of each grade of the grade sign, the displacement angle is equal to the displacement angle of each tooth angle of the central gear, A circular overlapping step is formed at the upper end of the hollow shaft, and a sign board relay connection device with a unique positioning connection is provided between the sign board and the hollow shaft. An angle adjustment knob relay connection device with a unique positioning connection is provided between the central shaft and the angle adjustment knob. The angle adjustment knob relay connection device is configured by fastening a two-way connection block to the upper end of the central shaft by screwing. A restricting cover is provided at the lower end of the large gear, a second restricting chute is formed in the restricting cover, and the crank passes through the second restricting chute and exits the large gear; A limiting groove-limiting block mechanism is provided between the sign board and the angle adjustment knob. Manually adjustable swing angle adjustment device based on electric fan sign.

2. The limiting groove-limiting block mechanism is characterized in that an arc-shaped limiting groove is formed on the sign board, a limiting block is formed on the angle adjustment knob, and the limiting block is inserted into the limiting groove. A manually adjustable swing angle adjustment device based on the electric fan mark of claim 1.

3. The slider is formed with a second inner chamber, a rack is formed on the inner wall of the second inner chamber, a central gear is inserted into the second inner chamber and meshes with the rack, a graded uneven body is formed on the outer wall of the slider, the center distance of the graded uneven body is equal to the rack tooth distance, the tip of the graded uneven body slides into the groove wall of the first limiting chute, a notch is formed on the groove wall of the first limiting chute, and a fastener of a spring-fastening device is disposed in the first inner chamber of the large gear so as to pass through the notch and come into elastic fastening contact with the graded uneven body. A manually adjustable swing angle adjustment device based on the electric fan mark of claim 1.

4. The fastener has one end having a first arc-shaped protrusion and the other end having a square block, and the first arc-shaped protrusion of the fastener passes through a notch and elastically contacts with the graded uneven body. A manually adjustable swing angle adjustment device based on the electric fan mark as claimed in claim 3.

5. An overlap bump is formed between the lower end surface of the slider and the crank, and an extension chute is formed on the limiting cover along the second limiting chute, and the overlap bump slides into the extension chute. A manually adjustable swing angle adjustment device based on the electric fan mark of claim 1.

6. a reinforcing bush is formed in a lower wall of the worm bush of the housing along a non-engagement portion of the tooth crest surface of the worm gear, and the reinforcing bush has an arcuate surface that is in a movable engagement with the tooth crest surface of the worm gear. A manually adjustable swing angle adjustment device based on the electric fan mark of claim 1.

7. A symmetrical groove and an asymmetrical groove are formed on the shaft of the angle adjustment knob, a through hole is formed on the shaft of the symmetrical groove, a symmetrical protrusion and an asymmetrical protrusion are formed on the cylinder of the two-way connection block, and a buckle bump is formed at a position corresponding to the through hole of the symmetrical protrusion, and the buckle bump is inserted into the through hole to make an engagement contact between the buckle bump and the through hole. A manually adjustable swing angle adjustment device based on the electric fan mark of claim 1.

8. The asymmetric grooves are asymmetric grooves that are offset from each other in the circumferential direction of the symmetric grooves, one of which is a rectangular groove and the other is an arc-shaped groove, The asymmetrically shaped convex stripes are asymmetrically shaped convex stripes that are offset from each other in the circumferential direction of the symmetrically shaped convex stripe, one of which is a rectangular convex stripe and the other is a second arc-shaped convex stripe, The longitudinal length of the asymmetric rectangular convex stripe and the second arcuate convex stripe is longer than the longitudinal length of the symmetrical convex stripe. A manually adjustable swing angle adjustment device based on the electric fan mark as claimed in claim 7.

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