TWM525990U - Sunshade rolling up device - Google Patents
Sunshade rolling up device Download PDFInfo
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- TWM525990U TWM525990U TW105202067U TW105202067U TWM525990U TW M525990 U TWM525990 U TW M525990U TW 105202067 U TW105202067 U TW 105202067U TW 105202067 U TW105202067 U TW 105202067U TW M525990 U TWM525990 U TW M525990U
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Description
本創作係關於一種關於遮陽簾的設備,特別是指一種遮陽簾捲收裝置。 This creation relates to a device for a sunshade, and more particularly to a sunshade retractor.
按,許多的汽車遮陽簾、家庭用窗簾都是採用可捲收的構造,其係將遮陽簾裝置在一個捲軸之上,然後再藉由一個捲收裝置帶動捲軸,該捲收裝置係具有一個彈力裝置,其係可藉由彈力裝置的彈力帶動該捲軸產生捲動,以帶動該捲軸產生將遮陽簾收起的動作。 According to the fact, many automobile sunshades and household curtains are in a retractable configuration, which is configured to mount the sunshade on a reel and then drive the reel by a retracting device having a reeling device. The elastic device is configured to drive the reel to be rolled by the elastic force of the elastic device to drive the reel to generate an action of retracting the sunshade.
一般習用的遮陽簾的捲收裝置包括有容納裝置,其呈一長形的筒狀體成是長方形盒體,及中心軸,一端固定於容納裝置的一端,另一端懸空;及捲軸,可轉動地套合在中心軸之上,捲軸的一端設置有一固定套,固定套上設置有一凸塊,凸塊與設置在捲軸之缺口卡合,而使得固定套與捲軸卡合固定在一起;及捲簾,一端固定在捲軸之上,當捲軸轉動時,可以將捲簾捲繞於捲軸之上,而將捲簾收納於容納裝置內部;及彈簧裝置,設置在捲軸的內部,其一端固定於中心軸末端的卡合槽之中,而另一端固定在固定套之上。 A conventional retracting device for a sunshade includes a receiving device having an elongated cylindrical body formed into a rectangular box body and a central shaft having one end fixed to one end of the receiving device and the other end suspended; and a reel rotatable The ground sleeve is sleeved on the central shaft, and one end of the reel is provided with a fixing sleeve, and the fixing sleeve is provided with a convex block, and the convex block is engaged with the notch disposed on the reel so that the fixing sleeve and the reel are engaged and fixed together; a curtain, one end is fixed on the reel, when the reel is rotated, the roller blind can be wound on the reel, and the roller blind is received inside the accommodating device; and the spring device is disposed inside the reel, one end of which is fixed at the center The end of the shaft is in the engaging groove, and the other end is fixed on the fixing sleeve.
使用前,工廠中事先將遮物簾捲繞在中心軸上,對彈簧進行預旋,相對于中心軸旋轉凸塊帶動彈簧的一端轉動;此時由於彈簧的另一端固定不動,彈簧就會產生扭力並存儲動能;使用前將這種動能進行鎖定;實際使用時,通過若干安裝件將捲有遮物簾的助力裝置連接於汽車或其他載體上。 Before use, the curtain is wound on the central shaft in advance in the factory, and the spring is pre-rotated. The one end of the spring is rotated relative to the central axis. At this time, the spring is generated because the other end of the spring is fixed. Torque and store kinetic energy; this kinetic energy is locked before use; in actual use, the power-assisted device with the curtain curtain is connected to the car or other carrier through a number of mounting members.
當需要展開遮物簾時,拉動遮物簾自由端到所需位置後,由另外的定位裝置進行定位即可;當需要收回遮物簾時,解鎖定位元裝置,遮物簾即通過彈簧儲能的釋放自動回收;傳統的助力裝置預旋好之後,需 要在中心軸外加設帶有開口的容納裝置,以使遮物簾的自由端伸出開口並通過凸塊與捲軸之缺口固定,進而鎖定彈簧的儲能狀態和遮物簾的捲繞狀態;因此,此種結構的助力裝置需要加設容納裝置,並且是在預旋的狀態下安裝,裝配相對繁瑣和吃力,降低了生產效率和提高了成本,同時,在出貨運送時,仍會有可能受到不小心的碰撞觸及中心軸而使凸塊脫離捲軸之缺口,而導致彈簧的釋放,造成元件的鬆脫。 When the curtain curtain needs to be unfolded, after the free end of the curtain curtain is pulled to the desired position, the positioning device can be positioned by another positioning device; when the curtain curtain needs to be retracted, the positioning unit is unlocked, and the curtain curtain is stored by the spring. Automatic release of energy release; after the conventional booster is pre-rotated, it needs A receiving device with an opening is arranged outside the central shaft, so that the free end of the curtain curtain protrudes out of the opening and is fixed by the notch and the notch of the reel, thereby locking the energy storage state of the spring and the winding state of the curtain; Therefore, the booster device of such a structure needs to be provided with a accommodating device, and is installed in a pre-rotation state, which is relatively cumbersome and laborious to be assembled, reduces production efficiency and increases cost, and at the same time, when shipped and shipped, there is still The bump may be accidentally hitting the center shaft to disengage the bump from the reel, causing the release of the spring, causing the component to loosen.
然有鑑於此,本創作人乃針對習知技術之缺點而加以改良,經多年從事於此一行業之經驗,於是創作出本創作。 In view of this, the creator has improved the shortcomings of the prior art, and after years of experience in this industry, he created the creation.
本創作者鑑於前述的問題,進而用心研究開發,因此本創作主要目的係在提供一種遮陽簾捲收裝置,直接在細長桿外套設第一套管,以外部包覆方式進行塑膠射出成型加工,無須如前述習知的技術中對套管內部進行加工如此繁複與困難,同時,本創作利用各導引斜面的設置,以及夾固件的設置,可以透過導引而確保組裝順暢,更可以確保出貨運送時,元件不會鬆脫,可進一步加強避免彈簧所儲存的旋轉能力不會因運送時不小心的碰撞而導致不良。 In view of the above problems, the creator further studies and develops with care. Therefore, the main purpose of the present invention is to provide a sunshade retracting device, which is provided with a first sleeve directly on the elongated rod casing, and is plastically injection molded by external coating. There is no need to process the inside of the sleeve in the prior art as complicated and difficult. At the same time, the creation uses the arrangement of the guide slopes and the setting of the clamps to ensure smooth assembly and ensure the smoothness of the assembly. When the cargo is delivered, the components will not be loosened, and it can be further strengthened to avoid the rotation ability of the spring to be stored, which is not caused by accidental collision during transportation.
為達上述的目的,本創作提供一種遮陽簾捲收裝置,包括一細長桿;一第一套管,套設在該細長桿的一預定位置,該第一套管具有一第一管體以及一第一限位部,該第一管體套設在該細長桿外,該第一限位部從該第一管體的其中一端軸向地朝外延伸設置;一第二套管,具有一螺紋段、一套管段、以及一第二限位部,該螺紋段與該套管段相互連通,且該螺紋段對應該第一套管的該第一限位部,該螺紋段的一內徑大於該套管段的一內徑,該螺紋段的一外徑小於該套管段的一外徑,該第二限位部設置在該螺紋段內,且位在該螺紋段與該套管段之間;以及一彈簧,套設在該螺紋段及該細長桿外,且該彈簧的兩端分別固定在該套管段鄰近該螺紋段的一端與該細長桿遠離該第二套管的一端處。 In order to achieve the above object, the present invention provides a sunshade retracting device comprising an elongated rod; a first sleeve sleeved at a predetermined position of the elongated rod, the first sleeve having a first tube body and a first limiting portion, the first tubular body is sleeved outside the elongated rod, the first limiting portion extends axially outward from one end of the first tubular body; a second sleeve has a threaded section, a sleeve section, and a second limiting portion, the threaded section and the sleeve section are in communication with each other, and the threaded section corresponds to the first limiting portion of the first sleeve, and an inner portion of the threaded section The diameter is larger than an inner diameter of the sleeve segment, an outer diameter of the thread segment is smaller than an outer diameter of the sleeve segment, the second limiting portion is disposed in the thread segment, and is located in the thread segment and the sleeve segment And a spring disposed outside the threaded section and the elongated rod, and two ends of the spring are respectively fixed at an end of the sleeve section adjacent to the threaded section and an end of the elongated rod away from the second sleeve.
其中,當該細長桿依序穿經該螺紋段及該套管段時,該細長桿朝一第一方向轉動一預定角度使該彈簧儲存旋轉能量,而該螺紋段可套設在該第一套管外,且透過該第一套管的該第一限位部與該第二套管的該 第二限位部相互可拆卸地結合固定。 Wherein, when the elongated rod sequentially passes through the threaded section and the sleeve section, the elongated rod is rotated in a first direction by a predetermined angle to cause the spring to store rotational energy, and the threaded section can be sleeved on the first sleeve And passing through the first limiting portion of the first sleeve and the second sleeve The second limiting portions are detachably coupled to each other.
其中,當該細長桿朝與該第一方向相反的一第二方向轉動時,該彈簧釋放儲存的旋轉能量,以使該細長桿透過該第一套管與該第二套管自動地脫離。 Wherein, when the elongated rod is rotated in a second direction opposite to the first direction, the spring releases the stored rotational energy to automatically disengage the elongated rod from the second sleeve through the first sleeve.
在某些實施例中,該第一限位部包括有一第一導引凸塊以及一第二導引凸塊,該第一管體套設在該細長桿外,該第一導引凸塊及該第二導引凸塊從該第一管體的其中一端軸向地朝外延伸設置,且該第一導引凸塊及該第二導引凸塊相互角度間隔地設置,該第二限位部具有一第一限位凹槽以及一第二限位凹槽,該第一限位凹槽及該第二限位凹槽分別對應該第一導引凸塊及該第二導引凸塊設置。 In some embodiments, the first limiting portion includes a first guiding protrusion and a second guiding protrusion. The first tube body is sleeved outside the elongated rod, and the first guiding protrusion And the second guiding protrusion extends axially outward from one end of the first tube body, and the first guiding protrusion and the second guiding protrusion are disposed at an angular interval from each other, the second The limiting portion has a first limiting groove and a second limiting groove, and the first limiting groove and the second limiting groove respectively correspond to the first guiding protrusion and the second guiding Bump setting.
在某些實施例中,該第一導引凸塊具有一第一導引斜面,該第二導引凸塊具有一第二導引斜面,該第一導引斜面及該第二導引斜面的傾斜方向朝向該第一方向設置。 In some embodiments, the first guiding protrusion has a first guiding inclined surface, and the second guiding protrusion has a second guiding inclined surface, the first guiding inclined surface and the second guiding inclined surface The oblique direction is set toward the first direction.
所述之遮陽簾捲收裝置,更包括一固定夾件,該固定夾件大致呈U型,具有一豎直端以及一彎曲端,該豎直端從該套管段徑向的其中一側外部穿入,並穿經該細長桿,再從該套管段徑向的另一側而穿出,該彎曲段則夾抵該套管段外側。 The sunshade retracting device further includes a fixing clip, the fixing clip is substantially U-shaped, has a vertical end and a curved end, and the vertical end is externally from one side of the sleeve section radially The penetrating rod is inserted and passed through the other side of the sleeve section in the radial direction, and the curved section is clamped to the outside of the sleeve section.
其中,本創作上述之目的及優點,不難從下述所選用實施例之詳細說明與附圖中,獲得深入瞭解。 In view of the above, the objects and advantages of the present invention are not difficult to understand from the detailed description of the selected embodiments and the accompanying drawings.
當然,本創作在某些另件上,或另件之安排上容許有所不同,但所選用之實施例,則於本說明書中,予以詳細說明,並於附圖中展示其構造。 Of course, the present invention is allowed to differ in some of the parts, or the arrangement of the parts, but the selected embodiments are described in detail in the present specification, and the construction thereof is shown in the drawings.
100‧‧‧遮陽簾捲收裝置 100‧‧‧Sunshade retracting device
10‧‧‧細長桿 10‧‧‧Slim rod
20‧‧‧第一套管 20‧‧‧First casing
201‧‧‧第一管體 201‧‧‧First tube
202‧‧‧第一限位部 202‧‧‧First Limitation Department
203‧‧‧第一導引凸塊 203‧‧‧First guiding bump
204‧‧‧第二導引凸塊 204‧‧‧Second guiding lugs
205‧‧‧第一導引斜面 205‧‧‧First guiding bevel
206‧‧‧第二導引斜面 206‧‧‧Second guiding bevel
30‧‧‧第二套管 30‧‧‧second casing
301‧‧‧螺紋段 301‧‧ Thread segment
302‧‧‧套管段 302‧‧‧ casing section
303‧‧‧第二限位部 303‧‧‧Second Limitation
304‧‧‧第一限位凹槽 304‧‧‧First limit groove
305‧‧‧第二限位凹槽 305‧‧‧Second limit groove
40‧‧‧彈簧 40‧‧‧ Spring
50‧‧‧固定夾件 50‧‧‧Fixed clips
501‧‧‧豎直端 501‧‧‧ vertical end
502‧‧‧彎曲端 502‧‧‧Bend end
B‧‧‧螺栓 B‧‧‧Bolts
P1‧‧‧預定位置 P1‧‧‧Predetermined location
P2‧‧‧位置 P2‧‧‧ position
第1圖表示本創作遮陽簾捲收裝置之分解示意圖。 Fig. 1 is a schematic exploded view of the sunshade retracting device of the present invention.
第2圖表示本創作遮陽簾捲收裝置中彈簧儲存轉動能量時之立體示意圖。 Fig. 2 is a perspective view showing the state in which the spring stores the rotational energy in the sunshade retracting device of the present invention.
第3圖表示第2圖中沿A-A線段之剖視示意圖。 Fig. 3 is a cross-sectional view showing the line A-A in Fig. 2;
第4圖表示第2圖中沿B-B線段之剖視示意圖。 Fig. 4 is a cross-sectional view showing the line B-B in Fig. 2;
第5圖表示第2圖中沿C-C線段之剖視示意圖。 Fig. 5 is a cross-sectional view showing the line C-C in Fig. 2;
第6圖表示本創作遮陽簾捲收裝置中彈簧釋放轉動能量時之立體示意圖。 Fig. 6 is a perspective view showing the spring releasing the rotational energy in the sunshade retracting device of the present invention.
關於本創作藉以達到上述目的之技術手段,茲以下列實施型態配合圖示於下文作詳細說明,俾令 鈞上深入瞭解並認同之。 The technical means by which this creation is used to achieve the above objectives are described in detail below with the following implementation diagrams, which are further understood and agreed upon.
請同時參考第1圖至第6圖,本創作係一種遮陽簾捲收裝置100,包括一細長桿10、一第一套管20、一第二套管30、以及一彈簧40。 Please refer to FIG. 1 to FIG. 6 simultaneously. The present invention is a sunshade retracting device 100 including an elongated rod 10, a first sleeve 20, a second sleeve 30, and a spring 40.
第一套管20可套設在細長桿10的一預定位置P1,第一套管20具有一第一管體201以及一第一限位部202,第一管體201套設在細長桿10外,第一限位部202從第一管體201的其中一端軸向地朝外延伸設置;其中,第一限位部202包括有一第一導引凸塊203以及一第二導引凸塊204,第一導引凸塊203及第二導引凸塊204從第一管體201的其中一端軸向地朝外延伸設置,且第一導引凸塊203及第二導引凸塊204相互角度間隔地設置。 The first sleeve 20 can be sleeved on a predetermined position P1 of the elongated rod 10. The first sleeve 20 has a first tube body 201 and a first limiting portion 202. The first tube body 201 is sleeved on the elongated rod 10. The first limiting portion 202 extends axially outward from one end of the first tubular body 201. The first limiting portion 202 includes a first guiding protrusion 203 and a second guiding protrusion. The first guiding protrusion 203 and the second guiding protrusion 204 extend axially outward from one end of the first tube body 201, and the first guiding protrusion 203 and the second guiding protrusion 204 Set at an angular interval from each other.
第二套管30具有一螺紋段301、一套管段302、以及一第二限位部303,螺紋段301與套管段302相互連通,且螺紋段301對應第一套管20的第一限位部202,螺紋段301的一內徑大於套管段302的一內徑,螺紋段301的一外徑小於套管段302的一外徑,第二限位部303設置在螺紋段301內,且位在螺紋段301與套管段302之間;其中,第二限位部303具有一第一限位凹槽304以及一第二限位凹槽305,第一限位凹槽304及第二限位凹槽305分別對應第一導引凸塊203及第二導引凸塊204設置。 The second sleeve 30 has a threaded section 301, a sleeve section 302, and a second limiting portion 303. The threaded section 301 and the sleeve section 302 communicate with each other, and the threaded section 301 corresponds to the first limit of the first sleeve 20. The inner diameter of the threaded section 301 is greater than an inner diameter of the sleeve section 302. An outer diameter of the threaded section 301 is smaller than an outer diameter of the sleeve section 302, and the second limiting portion 303 is disposed in the threaded section 301. Between the threaded section 301 and the sleeve section 302, wherein the second limiting portion 303 has a first limiting groove 304 and a second limiting groove 305, the first limiting groove 304 and the second limiting position The grooves 305 are respectively disposed corresponding to the first guiding protrusion 203 and the second guiding protrusion 204.
彈簧40可套設在螺紋段301及細長桿10外,且彈簧40的兩端分別固定在套管段302鄰近螺紋段301的一端與細長桿10遠離第二套管30的一端處(位置P2,可透過一螺栓B進行可拆卸地固定)。 The spring 40 can be sleeved outside the threaded section 301 and the elongated rod 10, and the two ends of the spring 40 are respectively fixed at one end of the sleeve section 302 adjacent to the threaded section 301 and the end of the elongated rod 10 away from the second sleeve 30 (position P2, It can be detachably fixed by a bolt B).
較佳者,第一導引凸塊203具有一第一導引斜面205,第二導引凸塊204具有一第二導引斜面206,第一導引斜面20 5及第二導引斜面206的傾斜方向朝向第一方向(如順時鐘方向)設置。 Preferably, the first guiding protrusion 203 has a first guiding slope 205, and the second guiding protrusion 204 has a second guiding slope 206, and the first guiding slope 20 5 and the inclination direction of the second guiding slope 206 is set toward the first direction (for example, clockwise direction).
在第2圖中,當細長桿10依序穿經第二套管30的螺紋段301及套管段302時,細長桿10朝一第一方向(如順時鐘方向)轉動一預定角度使彈簧40儲存旋轉能量,而螺紋段301可套設在第一套管20外,且利用第一導引斜面205及第二導引斜面206朝上述第一方向的導引,透過第一套管20的第一限位部202與第二套管30的第二限位部303相互可拆卸地結合固定;意即,透過第一導引凸塊203及第二導引凸塊204相對應第一限位凹槽304及第二限位凹槽305的相互可拆卸地結合固定,使彈簧40暫時儲存旋轉能量。 In Fig. 2, when the elongated rod 10 is sequentially passed through the threaded section 301 and the sleeve section 302 of the second sleeve 30, the elongated rod 10 is rotated in a first direction (e.g., clockwise) by a predetermined angle to store the spring 40. Rotating energy, and the threaded section 301 can be sleeved outside the first sleeve 20, and guided by the first guiding slope 205 and the second guiding slope 206 toward the first direction, through the first sleeve 20 The second limiting portion 303 of the second sleeve 30 and the second limiting portion 303 of the second sleeve 30 are detachably coupled to each other; that is, the first guiding protrusion 203 and the second guiding protrusion 204 correspond to the first limiting position. The groove 304 and the second limiting groove 305 are detachably fixed to each other, so that the spring 40 temporarily stores the rotational energy.
在第6圖中,當細長桿10朝與上述第一方向(如順時鐘方向)相反的一第二方向(如逆時鐘方向)轉動時,彈簧40釋放上述儲存的旋轉能量,以使細長桿10透過第一導引斜面205及第二導引斜面206的導引並利用第一套管20而與第二套管30自動地脫離。 In Fig. 6, when the elongated rod 10 is rotated in a second direction (e.g., counterclockwise direction) opposite to the first direction (e.g., clockwise direction), the spring 40 releases the stored rotational energy to cause the elongated rod 10 is guided through the first guiding slope 205 and the second guiding slope 206 and is automatically disengaged from the second sleeve 30 by the first sleeve 20.
另外,本創作之遮陽簾捲收裝置100更可包括一固定夾件50,固定夾件50大致呈U型,具有一豎直端501以及一彎曲端502,豎直端501從套管段302徑向的其中一側(如第2圖的上側)外部穿入,並穿經細長桿10,再從套管段302徑向的另一側(如第2圖的下側)而穿出,而彎曲段502則夾抵套管段302外側(如第2圖的左側),藉此以便在出貨運送時避免元件間發生碰撞而不小心觸碰到細長桿10而釋放彈簧40,進而導致元件鬆脫的問題。 In addition, the sunshade retracting device 100 of the present invention may further include a fixing clip 50. The fixing clip 50 is substantially U-shaped, has a vertical end 501 and a curved end 502, and the vertical end 501 has a diameter from the sleeve section 302. One of the sides (such as the upper side of Fig. 2) penetrates outside and passes through the elongated rod 10, and then passes out from the other side of the sleeve section 302 in the radial direction (as in the lower side of Fig. 2), and is bent The segment 502 is then clamped against the outside of the casing section 302 (as on the left side of FIG. 2), thereby avoiding collision between components during shipment and inadvertently touching the elongated rod 10 to release the spring 40, thereby causing the component to be loose. The problem.
藉由上述的結構,本創作的遮陽簾捲收裝置100直接在細長桿10外套設第一套管20,以外部包覆方式進行塑膠射出成型加工,無須如前述習知的技術中對如本創作之第二套管30內部進行加工如此繁複與困難,同時,本創作利用各導引斜面205、206的設置,以及夾固件的設置,可以透過導引而確保組裝順暢,更可以確保出貨運送時,元件不會鬆脫,可進一步加強避免彈簧40所儲存的旋轉能力不會因運送時不小心的碰撞而導致不良。 With the above structure, the sunshade retracting device 100 of the present invention directly coats the first sleeve 20 on the elongated rod 10, and performs plastic injection molding processing by external coating, without the need of the prior art. The internal processing of the created second sleeve 30 is complicated and difficult. At the same time, the creation utilizes the arrangement of the guide slopes 205 and 206 and the setting of the clamps, so that the assembly can be ensured smoothly and the shipment can be ensured. When transported, the components are not loosened, and it is further possible to prevent the rotation ability of the spring 40 from being stored, which is not caused by accidental collision during transportation.
以上所述實施型態之揭示係用以說明本創作,並非用以限制本創作,故舉凡數值之變更或等效元件之置換仍應隸屬本創作之範疇。 The above description of the embodiments is intended to be illustrative of the present invention and is not intended to limit the present invention, so any change in the value or substitution of equivalent elements should still fall within the scope of the present invention.
由以上詳細說明,可使熟知本項技藝者明瞭本創作的確可達成前述目的,實已符合專利法之規定,爰提出專利申請。 From the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the aforementioned objectives, and has been in compliance with the provisions of the Patent Law, and has filed a patent application.
100‧‧‧遮陽簾捲收裝置 100‧‧‧Sunshade retracting device
10‧‧‧細長桿 10‧‧‧Slim rod
20‧‧‧第一套管 20‧‧‧First casing
30‧‧‧第二套管 30‧‧‧second casing
40‧‧‧彈簧 40‧‧‧ Spring
50‧‧‧固定夾件 50‧‧‧Fixed clips
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW105202067U TWM525990U (en) | 2016-02-05 | 2016-02-05 | Sunshade rolling up device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW105202067U TWM525990U (en) | 2016-02-05 | 2016-02-05 | Sunshade rolling up device |
Publications (1)
Publication Number | Publication Date |
---|---|
TWM525990U true TWM525990U (en) | 2016-07-21 |
Family
ID=56996715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW105202067U TWM525990U (en) | 2016-02-05 | 2016-02-05 | Sunshade rolling up device |
Country Status (1)
Country | Link |
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TW (1) | TWM525990U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI644014B (en) * | 2016-12-26 | 2018-12-11 | 郭在錫 | Spring pre-tensioning device for roll blind |
-
2016
- 2016-02-05 TW TW105202067U patent/TWM525990U/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI644014B (en) * | 2016-12-26 | 2018-12-11 | 郭在錫 | Spring pre-tensioning device for roll blind |
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