TWM310573U - Pivotal device with reduced number of components - Google Patents

Description

M310573 VIII. New description: [New technical field] This creation is a kind of hinge for reducing parts. It refers to the cover between the upper cover and the base of the cover device, so that the upper moss can be phased: Closed and rotating hinge. [Prior Art] Generally, a clamshell type electronic device, such as a notebook computer, a mobile phone, etc., has a hinge between the upper cover and the base, and the hinge mainly enables the upper cover to open and close relative to the base, with the hub The manufacturing process of the device and the user's demand increase, the prior art hinge not only enables the upper cover to open and close relative to the base, but also enables the upper cover to rotate relative to the base, so as to facilitate the user to use at any angle. Electronic devices, and in order to avoid damage to the electronic device and to maintain the normal operation of the electronic device, the prior art hinge may have a structure for positioning and limiting the upper cover relative to the base. However, in order to enable the upper cover to open and close and rotate with respect to the base, and for the function of positioning and limiting, the prior art hinge has a complicated structure and a large number of components, which not only has high manufacturing cost and high assembly difficulty, so Prior art inductors do have room for improvement. [New content] In view of the shortcomings of the existing hubs, the creation of the system is designed to reduce the number of parts; ^ District New Cry, & % 4 士,, - this, the function of the hinge itself, and Effectively reduce the parts of the hinge. In order to achieve the above-mentioned creative purposes, the technical means used in this creation is to design a hinge for reducing parts, including the · M310573 central frame 'which has a bottom cup; 9 八 卜 & a first side wing and a second side wing; a first opening and closing shaft set, and the first rotating shaft and a first rotating frame are rotatable relative to the first side wing, the first upper side; the one side wing is connected, The first opening and closing shaft set 'rotating shaft is disposed in the first side wing and the rotating bracket is sleeved and fixed to the rotating shaft-second opening and closing shaft group', which is connected with the second side wing, and the second opening and closing shaft group comprises: fixing a shaft and a second rotating bracket, the fixed shaft is disposed on the second side wing t H #承承套" fixed axis and can rotate relative to the fixed axis; a rotating shaft group, which is connected with the bottom plate, the rotating shaft group includes The utility model has a central shaft limiting piece, a limiting piece and a fixed bearing frame, wherein the central axis is disposed in the bottom plate and the middle portion is rotatable relative to the bottom plate, the limiting piece is sleeved on the central axis, and a limit is formed on the periphery of the limiting piece. The convex portion and the limiting block have a certain thickness, and the limiting block is sleeved and fixed Fixed on the central axis, the limiting block is adjacent to the limiting piece, and the limiting block # has a first limiting protrusion for the limit direction >1 - the side axial extension, and the first limiting protrusion of the limiting block The fixed bracket is sleeved and fixed to the end of the central shaft relative to the limiting protrusion of the limiting piece. The hinge of the creation is installed between the upper cover of the clamshell device and the base, and the fixed frame of the rotating shaft set and The upper cover of the clamshell device is fixed to each other, and the first and second rotating brackets are fixed to the base of the clamshell device. The advantage of the present invention is that the limit block of the rotating shaft group has a certain thickness setting, which can replace a plurality of The spacers are arranged to reduce the parts, thereby reducing the manufacturing cost and assembly steps. M310573 [Embodiment] Please refer to the first and second figures 〇), one brother and one opening and closing axis group (2 〇 and one rotating shaft group ( 4 〇). This creation consists of a central frame (a second opening and closing shaft set (3〇) described as the center frame (1〇 has a bottom plate (1 1 ) (13); )

Please refer to the third and fourth figures. The front door-shaped piece body, the center frame (1 〇) side wing (1 2 ) and the second side wing bottom plate (1 1 ) are integrally formed through the center hole (worker U). Two ribs (112) are respectively formed on the two sides adjacent to each other on the bottom side of the bottom plate (1 1 ), and the side ribs (112) have a certain height, and the bottom side of the bottom plate (1 1 ) is located at the center 1 (丄)丄1) at least a positioning recess (113) is formed in the periphery of the bottom plate, and the bottom surface of the bottom plate (1 &quot; is located at the periphery of the middle hole (1 1 1 ) and at least one limiting convex portion (1 1 4 ) is formed] The bottom side of the bottom plate (1 1 ) is concavely formed with a ring groove (1 work 5) along the circumference of the center hole (丄1 i ) and the positioning concave portion (1 1 3 ); the two side wings (1 2 ) ( 1 3 ) are respectively vertical Formed at the two ends of the bottom plate (completed), a central hole (丄2 1 ) is formed through the center of the first side wing (1 2 ), and the inner side of the first side wing (1 2 ) is concave around the center hole (the work 2 1 ) Forming a ring groove (122), a bevel (1 2 3 ) is formed on the periphery of the ring groove (122), and an inner side surface of the first side wing (12) is formed on the periphery of the ring groove (1 2 2) a convex portion (丄2 4 ), the outer side of the first side wing (1 2 ) is concavely formed with a ring groove (1 2 5 ) in the periphery of the central hole (1 2 1 ), outside the first side wing (1 2 ) The side ring groove (1 2 5 ) is concavely formed with at least one positioning concave M310573 port p (1 2 6 ), and the outer side of the first side wing (1 2 ) is concavely formed with a bad oil groove (1 2 7 ); a non-circular perforation is formed through the center of the first wing (1 3). (Refer to the third and fourth figures, the first opening and closing shaft set (2〇) and the center bearing The first side flap (丄2) of the (! 〇) is connected, and the first opening and closing shaft set (2〇) includes a rotating shaft (21), a convex positioning piece (22), a first rotating bracket (23), a spacer (24) and a fixing member (2 C 2 1 ), the shaft (2 1 1 ), the shaft (2 1 1 ) may be a screw, and the shaft (2 1 1) is disposed on the third side ( 1 2) In the center hole (1 2 1), the other end of the rotating shaft (2 1 ) is radially extended to form a positioning crown portion (2丄2), and a limit crown is formed on the rut (2 1 1 ) to extend radially a portion (2 1 3 ), limited to 4^ ( 2 1 3 ) adjacent to the inner side of the first side flap (1 2 ), (213) The peripheral radial extension is formed with a fan-shaped limit protrusion 2) 1 4) 'The limit crown (2 1 3 ) is adjacent to the first side wing (the ring protrusion of the 丄 (?... clothing bulge) 2 1 5), the shaft (2 work) ring concave sample M 9 ) is axially extended with the two-two crown (...) on the inner side of the first side wing (1 2 ) to form a convex positioning piece (99, + ( 2 1 χ λ ) is set and fixed on the outer side of the shaft of the rotating shaft ( 2 1 ), and the positioning piece (2 2 ) is adjacent to the first side (1 2 ) - matching - reading the sixth and seventh As shown in the figure, the convex positioning piece (2 2) M310573 is an elastic piece body, and the convex piece piece (2 2 ) has a radial sectional shape so that the convex positioning piece (2 ? A heart shape 壬 < shape, outer side surface And the direction of the convex positioning 彳U (1 2 ) 2) is extended to form a central convex portion (the wing (1 (22) adjacent to the 21st)) the side of the convex positioning piece positioning convex portion (22" (12) Extendingly forming at least a positioning protrusion (2 2 ) of the positioning piece (2 2 ) with respect to the positioning recess (first rotating bearing) of the first side wing (丄2) (2 1 1 ), Town # ^ w 1 )...+ 弟 疋 疋 ( (2 3 ) and convex positioning piece h 2 ) Neighbor, please match the person to explain 坌丄β m piece (2 m * brother six and seven figure, the first - rotating frame ^ 3) adjacent to the convex positioning (the side of the cymbal (22) is extended with a central convex The central convex part (2 2 1 ) of the central convex part (2 2 convex position Kf9D, -u invite ^ 2) of the rotation-supporting frame (2 3 ) abuts, and 6, the convex positioning piece 廿丄 丄 从 从 ) , , , , , , , 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎 猎(2 2) The degree of tightness; 2 The spacer (2 4 ) is sleeved on the shaft of the rotating shaft (2 1 ) (2 ^ ; the fixing member (2 5 ) is sleeved and fixed to the shaft of the rotating shaft (2 1 ) ( : End, the fixing member (25) can be screwed and fixed to a shaft.丄) The two opening and closing shaft sets (3 〇, ) are connected to the second opening and closing and the second rotating bearing frame shape, and the fixed shaft (3 1 , 5 青 see the third to fifth figures, the aforementioned first and the center The second side of the frame (1 〇) (丄3 car, and (3 〇) contains a fixed axis (3 1) (^2) 'The fixed axis (3 1) section is non-circular M310573 As soon as the second end is stepped down, the fixed axis (3 1 ) has the outer #max crown #( 3 1 3 ), the outer diameter of the second-order portion (3 1 4 ) and the outermost minimum For the last class (3 1 5), please refer to the fourteenth and fifteenth figures. The crown 1 of the fixed shaft (3 1) faces the center 牟 f ·!

The bottom plate (1 1) of the ', 1 〇) is radially extended to form an extension wing (3 1 7 ), and the extension wing (3丄7) and the bottom plate (丄丄" are abutted to enhance the overall stability, the fixed axis ( 31) The first class part (3 1 4 ) is set and fixed to the second side | (丄3) of the perforation (丄") - (3 1) the end of the class part (3 1 5) axial extension molding % The convex portion (3 1 1 , bucket, Λ ^ ^ ”, or as shown in the fourteenth and fifteenth figures, the fixed shaft (3 1 of the outer side wall of the class portion (314) is formed with a dovetail projection, ^ and The second flank (13) abuts against the solid &amp; flank (13) axial separation 'or as shown in the tenth figure:: fixed axis...) and the second flank (&quot; The carrier (32) is set on the end of the fixed shaft (31)

The heart 凸 Η 3 1 1 ) abuts, the ring convex part (3 and then the diameter is larger than the diameter of the fixed axis ( ^ Α Μ -^ ^ ^ d1 ), to stop the brother one % of the carrier (3 2 ) There are several notches formed on the fixed vehicle (off, ring-shaped convex part (3 1 1 ), and the axial direction of the ring). (See the third and fourth figures. Cheng Hao (! η, the square 疋 axis group (4 〇) and the bottom right side of the package 1 (11), rotating axis group "0)

:::(41),,"2),-convex positioning V fixed two: 4: (44), - limit block &quot;5), and - M310573 central axis (4 1) is placed on the bottom plate (1 1 In the central hole (worker 1), one end of the central shaft (4 1 ) is radially extended to form a limit crown (4 1 1 ). The limit crown (4 1 1 ) has two opposite limit sides ( 4 1 2 ) and the opposite plane sides (4 1 3 ), the distance from the limit side (4 1 2 ) to the center of the limit crown (4 1 1 ) is greater than the plane side (4 1 3 ) to the limit: 3⁄4 The distance from the center of the part (4 1 1 ), the limit crown of the central axis (4 1 ) (4 1 1 ) relative to the limit crown of the first opening and closing axis group (2 〇) 1) ... the central axis &quot ;丄= (4 1 1 ) Radially concavely formed with a ring groove (4 1 4 ), the ring groove (4丄4) of the central axis (4 1 ) is positioned relative to the positioning protrusion of the rotating shaft (2 i ) ( 2 1 6 ) 'The central car is axially extended from the other end to form a plurality of fixed convex parts (4 1 5 ); the elastic piece (4 2 ) is sleeved on the central axis (4 work), and the convex positioning piece ( * 3) Sleeve and fixed on the central axis (the upper part of the upper part of the central positioning frame (4 3) adjacent to the center frame (1〇) Then, at least a bump (431) is formed on the side of the convex positioning piece (43) relative to the bottom plate, and the positioning protrusion of the convex positioning piece (zlq, ^" convex piece (4 3 ) is 4 3 Positioning recess (1 1 3 ) with respect to the bottom plate (1 1 ). The limiting piece (44) is sleeved on the central axis (the upper limit piece (the 4th edge is radially extended to form a fan-shaped limiting protrusion) The block (4 5 ) is sleeved and fixed on the central axis ( 5 ) and the right one is on the sound, 41), and the limit block (4 - has - 疋 度 'limit block (45) is adjacent to the limit piece &quot;4), , and the vertical block (4 5 ) relative to the limit piece (4 has a flute and a rm α π side axial extension forming limit bump (4 5 1 ), limit block (4 where V 4 b ) The limit protrusion 11 M310573 block (451) is opposite to the limit protrusion (441) of the limit piece (44), please refer to the +2闰1 (A - Figure 斤不' in this creation - another embodiment In the limit piece: 4) the limit protrusion &quot;", the axial extension is formed on the circumference of the limit protrusion to make the r 4) relative to the first limit of the limit block (45); = 5 1 ) 'The limit block (4 5 ) is different from the limit # ( 4 4 ) Two limiting protrusion (452); Yi solid rack (46) disposed and fixed to the sleeve central axis &quot; fixed rack r / 1 β, Shan Ping, Shang 4) Wo tin,

6) a fixing hole (461) is formed through the center, and (61) the inner wall surface is concavely formed with a plurality of fixing recesses 62). The fixing convex portion (...) of the fixing bracket (46) is fixed. For fitting, please click the door. As shown in the figure, the fixed frame (4 Θ) is adjacent to the limit block (4 5 ), and the 2 frame (4 6 "for the limit block (4 5 ) - side axial extension To J - limit bump (4 6 3 ), fixed bracket (4 (1) limit 4 vertical convex wonderful (Λ Ο (3) relative to the limit block (4 5) second limit bump

( 4 5 2 ). As shown in the second and eighth figures, the creation is installed between the second (5 〇) and the base (6 〇) of the electronic device, and the rotating shaft set (4 〇), the bearing (4 6) Cooperating with the upper cover (50), the first opening and closing shaft of the brother-rotating bracket (23) and the second opening and closing shaft group (3 the second brother of the rotating bracket (32) and the base (60) Fixed, as shown in Figure IX, when the upper cover (5 〇 "mesh for the base (6: when opening and closing 'the upper cover (5 0) drives the center frame (10) and rotates, (40) relative to First and second rotating brackets (2 3 ) (32) 12 M310573 Rotating, please refer to the figure shown in the tenth figure. 'When the upper cover (5 〇) knows the day, when the base (60) rotates, the upper cover (50) Drive the fixed bracket (4β) to rotate relative to the center bracket (10). Please refer to the third, fourth, eighth and ninth diagrams when the upper jaw | 3 U ) opens and closes relative to the base (60). The fixed frame (4 6 ) drives the rotating shaft set (40) and drives the center frame (1 〇) to rotate, and the first side wing (12) of the center frame (worker) is opposite to the first opening and closing axis group (2) 〇') rotation of the shaft (2 1 )

Since the convex positioning piece (2 2 ) of the first opening and closing shaft group (20) and the rotating shaft (2 1 ) are fixed to each other, the first side wing (丄2) rotates relative to the convex piece (2 2 ). When the positioning recess of one side X (丄2) is engaged with the positioning convex part (2 2 2 ) of the convex positioning piece (22), the upper cover (50) is positioned relative to the base (6〇); 2 1) Rotate, when) is opposite to the rotating shaft (2 1 ) upper cover (5 0 ) due to the limiting protrusion of the first side wing (1 2 ) relative to the first side wing (1 2 ) of the rotating shaft (the limiting convex of the 丄 2 4 When the part (2 1 4 ) is abutting, it is limited to the angle at which the base (60) is opened and closed; when the rotating shaft (21) is rotated relative to the limit crown (2) of the first axis (2)/, Rotating the inner side of the phase friction, the first side flap "the groove of the side flap (1 2) (...) and the inner side of the inclined surface have a concave ring to increase its strength, so it can slow down the heart palpitations::: The inner side of the crown (2...the frictional wear 2 (1 door 2) is limited to 2) relative to the first side wing, the same reason, the convex position piece (2 when the outer side rotates, the first side flap 13 M310573 (1:) ring groove on the outside side (12 5 ) slow down the degree of wear on the outer side of the first side wing (1 2 ). See the third, fourth, eighth, and ten to twelve figures, when the upper cover (50) is relative to the bottom temple ^, M, - doubt At the time of rotation, the fixed frame (4 6 ) drives the central uranium fw of the rotating shaft group (40) to rotate 0; relative to the center frame (1 due to the rotating axis group (4 〇&gt; $ ..., 4 U ) Convex position piece (4 3 ) and central axis

η, 定 'convex positioning piece ' 3 ) with respect to the center frame (丄:) (= (: &quot; rotation, t convex positioning piece (43) positioning convex day ± # bottom plate (1 1) positioning recess ( 1 1 3) Phase-fitting day-to-day guard, upper cover (50) is positioned relative to the base (6〇). Bit 2 is fixed to the limit axis (45) and the central axis “...mesh fixed, limit t ^ 5) relative to the limit The piece (4 4) is rotated, when the limit block (4, the limit of the limit block (4 5 1 ), the limit limit piece (4 4 ) 4 1 ), and the limit block (4 5 ) = bump (4 5 2 ) and the limit bracket of the fixed bracket (4 when the two are against each other, limit the upper cover (5 〇) _ to the base (6Q) opening and closing angle; = positioning piece (43) relative to the bottom plate ( U) When rotating, convex = 4 3 ) rubs against the bottom side of the bottom plate (!丄). Since the bottom side and the bottom side of "1) are provided with concave ring grooves (115), the bottom plate can also be slowed down. The degree of wear on the bottom side of (1 1 ); &quot; when the plane side (4 13) of the limit crown of the central axis (4 1 ) is relative to the limit crown of the shaft (21) ( 213) When, 14 M310573 ~ Axis (4 1 ) limit crown (4 丄 limit crown (2 ] q彳# With respect to the rotation axis (2 1 ) (2 1 3 ), the center first opening and closing axis group r 9 n ( 4 1 ) can be rotated relative to the ": 20) axis (1)); the field center axis (4 1 The limit of 12) relative to the limit side of the shaft 1411) (4 ... (2 1 ) limit crown [9 1 ^, Skull axis (2 1) limit crown ( : (213) When 'turning to the central axis (4 &quot;, 凸 convex (2 1 β)

4) When the phase is fitted, the limit is now limited. (5 ring groove (41 &quot;〇) is relative to the base (6〇 "It is impossible to drive the damage caused by the rotating shaft group. The simple illustration of the style] The first picture is the three-dimensional appearance of the creation f, the picture is the creation of another perspective view of the three-dimensional appearance of the second picture of the creation of the component of the fourth picture of the creation of the creation of another perspective view of the component

= Figure 3 is a three-dimensional appearance of the components of the creation. The sixth picture is the side view of the creation. The seventh picture is the top view of the creation. The eighth picture is the end view of the implementation state of the creation. The tenth view of the view is the perspective view of the action of the creation. The eleventh figure is the side view of the action of the creation. The twelfth figure is the action of the creation. The thirteenth figure is an exploded view of another embodiment of the present invention. The fourteenth figure is the part of the composition of the fifteenth figure. The sixteenth part of the composition is the part of the creation. The sixteenth part of the composition is the part of the creation [the main component symbol description] (1 〇) center frame (1 (1 1 1) center hole (1 ( 1 1 3 ) Positioning recess (1 ( 1 1 5 ) ring groove ( 1 ( 1 2 1 ) center hole ( 1 ( 1 2 3 ) bevel ( 1 ( 1 2 5 ) ring groove ( 1 ( 1 2 7 Oil groove ( 1 ( 1 3 1 ) perforation ( 2 ( 2 1 ) shaft ( 2 ( 2 1 2 ) positioning crown ( 2 ( 2 1 4 ) limiting protrusion ( 2 ( 2 1 6 ) positioning convex ( 2 ( 2 2 1 ) Center convex part ( 2 ( 2 3 ) First rotating bracket ( 2 ( 2 3 2 ) Central recess ( 2 ( 2 5 ) Fixing piece ( 3 ( 3 1 )) Shaft (3 (312) notches (3 (314) of the first class section (3

Side view of a side view of a further perspective view of a further embodiment of the present invention: 1) base plate 1 2) side rib 1 4) limit projection 2) first side wing 2 2) ring groove 2 4) limit convex Part 2 6) positioning recess 3) second side flap 0) first opening and closing shaft set 1 1) shaft 13) limiting crown 15) ring projection 2) convex positioning piece 2 2) positioning convex part 3 1) center Convex 4) Shim 0) Second opening and closing shaft set 11) Annular projection 1 3) Crown 1 5) End class 16 M310573 . (3 1 6 ) Dovetail (3 ( 3 2 ) second rotation Shelf (4 • ( 4 1 ) central axis (4 . (4 1 2 ) limit side (4 (414) ring groove (4 (4 2 ) shrapnel (4 (4 3 1 ) positioning bump (4 (4 4 4 1) Limiting convex part (4 Φ ( 4 5 ) limiting block (4 (4 5 2 ) second limit bump (4 6 1 ) fixing hole (4 (4 6 3 ) limiting bump ( 5 (6 0 ) base 17) extension wing 0) rotating shaft set 11) limit crown 13) plane side 1 5) fixing protrusion 3) convex positioning piece 4) limiting piece 4 1 ') limiting convex part 5 1) The first limit bump (4 6 ) fixes the bracket 6 2 ) fixes the recess 0 ) the upper cover 17

Claims (1)

M310573 IX. Patent application scope: 1 · - A hinge for reducing parts, including: · a center frame, I., 〃 &amp; plate and a first side wing and a second side wing respectively formed at two ends of the bottom plate; a first-opening and closing shaft assembly connected to the first side wing, the first opening and closing shaft group 匕3咎 shaft and the first rotating bracket, the rotating shaft is disposed in the first side wing and rotatable relative to the 四(four) wing a first rotating bracket sleeve and fixed to the rotating shaft; a second opening and closing shaft group connected to the second side wing, the second opening and closing shaft group 匕3 #固疋 axis and a second rotating carrier The fixed shaft is disposed in the second side wing, the first rotating bracket is sleeved on the fixed shaft and rotatable relative to the fixed shaft; a rotating shaft group is connected to the bottom plate, and the rotating shaft group includes a central shaft and a limit a piece, a limiting block and a fixed frame, the central axis is disposed in the bottom plate and the middle portion is rotatable relative to the bottom plate, the limiting piece is sleeved on the central axis, and a limiting convex portion is formed on the periphery of the limiting piece, the limit is limited The block has a certain thickness, the limiting block is sleeved and fixed on the central axis, and the limiting block is adjacent to the limit The limiting block is axially extended with respect to the side of the limiting piece to form a first limiting protrusion, and the first limiting protrusion of the limiting block is sleeved relative to the limiting protrusion of the limiting piece, and the fixed frame is sleeved and Fixed at the end of the center shaft. 2. The hinge of the reduced part as described in claim 1 wherein the limit projection of the limiting piece is radially extended from the periphery of the limiting piece. 3 · As for the hub of the reduced parts 18 M310573 as described in the scope of claim 1, the limit protrusion of the limiting piece is extended from the peripheral of the limiting piece by 4. The patent scope is 丄, 2 or The hinge device for reducing parts according to the item 3, wherein the limiting block is axially extended from the side of the limiting piece to form a second limiting convex %, and the fixed receiving frame is axially extended relative to the limiting block. There are at least - limit bumps, and the limit bumps of the frame are opposite to the second limit bumps. The utility model as claimed in claim 4, wherein the first side wing outer surface of the center frame is concavely formed with at least one positioning concave portion, and the first opening and closing shaft group comprises a convex positioning. The piece, the convex positioning piece sleeve is fixed on the rotating shaft of the first opening and closing shaft group, the convex positioning piece is adjacent to the first side: the outer side of the wing is Φ, the convex positioning piece is an elastic piece body, and the convex positioning piece is radially broken. The shape of the surface is <shaped, the edge of the convex positioning piece abuts against the outer side of the first side wing, and the center of the convex positioning piece extends away from the first side wing to form a center convex, and the convex positioning piece is adjacent to the first The side of the side flap is extended with at least one positioning convex portion, and the positioning convex portion of the convex positioning piece is opposite to the positioning concave portion of the first side wing. The first rotating bearing frame and the convex positioning frame are adjacent to the convex positioning piece. The side extension is formed with a central tenon, and the central convex portion of the first rotating bearing abuts against the central convex portion of the convex positioning piece. 6. The drag-reducing device for reducing parts as described in claim 5, wherein a central hole is formed through the center of the bottom plate of the center frame, and a central groove is formed in the periphery of the central hole of the bottom plate, and the center of the first side wing Throughout the formed-centre hole-the inner and outer sides of the side flap are located at the periphery of the center hole of the first side wing, and a ring groove is formed concavely. 19 M310573 7 The hinge for reducing parts according to claim 6, wherein the fixed shaft section of the second opening and closing shaft group is non-circular, and the fixed shaft is firstly and axially extended to form a ring convex. The outer diameter of the fixed shaft is stepped down from the first end to the second end, and the second rotating bracket is sleeved on the second end of the fixed shaft and abuts against the annular protrusion. 8. The hub of the reduced part of claim 7, wherein the fixed shaft forms a crown having the largest outer diameter from the first end to the second end, The first class part of the outer I _ person and the last class part with the smallest outer diameter, the first-stage part of the fixed shaft is disposed in the second side wing, and the annular convex part of the fixed wire is axially extended and formed at the end of the fixed axis. The second rotating bracket is sleeved at the end of the fixed shaft. ^ ^ ^ T #寻利范围# The reduction of parts of the habitat is as follows: wherein the center of the second wing of the center frame is formed with a perforation through the center, the first-stage portion of the fixed shaft is pierced and (iv) the second wing Perforated. Cry 2 ★ Declare the pivot of the reduced part as described in Item 8 of the patented circumference, wherein the outer side wall of the first-stage portion of the fixed shaft is a tail-bump, and the dovetail abuts against the second side wing.鸠器: The hub for reducing parts as described in item 8 of the Guoli range, and the middle solid shaft and the second side wing are integrally formed. The 丄 2 solid =: _ δ item reduces the number of parts of the hub. 1 3 . For example, the patented scope 2nd device, wherein the fixed shaft is facing the 二-extension wing of the 'two> part of the center frame, and the extension wing abuts against the bottom plate. &amp; anti-Bei W work extension molding 20