201004539 九、發明說明： 【發明所屬之技術領域】 尤其涉及一種用於調節顯 本發明涉及一種升降機構 示屏高度之升降機構。 【先前技術】 隨著電腦之廣泛應用，其功能 刀月匕日垃增加和完善，其體 積也趨向於輕薄化發展。由 、 CRT(C Λ Ώ τ u 於液日日顯示裝置相對 LRT(Cathode Ray Tube,陰極 妗；^、曰亡 ^ θ ，丨衣極射線官）顯示器具有體積小、 重1輕之優點，故其逐漸取代CRT翩-„二、从 〜K1顯不态成為電腦之主要 部件：為了方便人們從不同視角觀看液晶顯示屏，習知液 晶顯不裝置上通常設有升降機構以對液晶顯 行調整。 如圖1所示’―種習知調節液晶顯示屏高度之升降機 構100,纟包括：-基座1G、—升降塊2G及—卷菁3〇。 該基座10上開設有一槽道u，該槽道n内設有二相對之 滑軌12，且該槽道U之外緣頂端設有固定孔13。該升降 塊20可插入基座10之槽道u内並可相對基座1〇滑動， 該升降塊20之頂端設有與液晶顯示屏相連之連接部21， 該升降塊20之底端開設有二螺孔22(>該卷簧3〇之一端固 定於一軸杯31上，該軸桿31之二端分別開設有固定孔 311，固定件33穿過軸桿31之固定孔311及基座1〇上之 固定孔13將軸桿31鎖合至基座1〇;該卷箐3〇之另一端 開設有二通孔32，固定件36穿過該卷簧3〇上之通孔32 及升降塊20上之螺孔22將該卷簧30之端部鎖合至升降塊 201004539 使用時，施力下壓與升降塊2〇相連之液晶顯示屏，以 使升降塊20下降到適當之位置，然後鬆開手，則該液晶顯 示屏和升降塊20之重力可與卷簧3〇之回復力、升降塊2〇 與2座1〇之間之摩擦力達到平衡而使該升降塊20定位； 如需升鬲液晶顯示屏，則於液晶顯示屏上施加向上之推 力’該推力和卷簧30之回復力可克服液晶顯示屏和升降塊 20之重力及升降塊2〇與基座1〇之間之摩擦力，將升降塊 20升高至預定位置。 然，該種升降機構10〇主要是藉由卷簧3〇之回復力來 平衡液晶顯示屏和升降塊2G之重力，而卷簧％經過多次 拉伸後，$易發生形變，從而導致卷簧3〇不能再提供足夠 之回復力平衡液晶顯示屏和升降塊2()之重力。故該種升降 機構⑽之使料命較短。另，由於卷簧％之回復力基本 恒定’故該種升降機構⑽上只能裝設特定重量之負載。 【發明内容】 ' 鑒於以上内容’有必要提供一種具有較長使用壽命， 且可裝設不同重量負载之升降機構。 -種升降機構’包括—支架、—滑動件及至少一扭著， 該支架上时至少-滑執組，該滑動件藉由滑軌組可滑動 地設於支架上，該扭簧之二端分別與支架及滑動件相連。 相較習知技術，所述升降機構之滑動件藉由滑執組可 滑動地设於支架上，且藉由扭簧與支架相連，故在滑動件 之滑動過程中，扭簧之二端子僅在—定角度範圍内靠近或 201004539 遠離’可長時間使用而不發生形變，因此，該種升降機構 具有較長之使用壽命。另，藉由改變扭簧二端部之長度’ 可改變扭篑之力臂大小，從而可使該種升降機構之滑動件 上裝設不同重量之負載。 【實施方式】 本發明之較佳實施例公開一種升降機構，其適用於帶 有顯示屏之電子裝置。在本實施例中，以液晶顯示裝置為 例加以說明。 請參閱圖2,液晶顯示裝置4〇包括一液晶顯示屏41、 一底座42和一連接液晶顯示屏41與底座42之升降機構 50 ° 連接組件56、一第三連接組件57及複數固定件（圖未示）。 該支架51包括一设體51〇及二滑執組515。該殼體51〇 請同時參閱圖3及圖4,本較佳實施例所述之升降機 構50包括一支架51、一滑動件52、一連接件53、一第一 扭簧541、一第二扭簧542、一第一連接組件％、一第 包括一基板512及由該基板512二相對侧邊垂直該基板 512延伸形成之二侧擋板5 i 4，該基板5 i 2中部開設有一條 形滑槽5121。該基板512於該滑槽5121底部之二側還分 別開設有-第-通孔5122及—第二通孔5123，該滑執組 515包括一外滑軌5151、一滾珠軸承5153及一内滑軌 5155 β亥内滑軌5155之頂部開設有三固定孔5156，底部 開設有二定位孔5157。該滾珠軸承5153用於耦合在外滑 軌5151及内滑轨5155之間，以減小外滑軌5ΐ5ι及内滑執 201004539 5155之間之摩擦力。 該滑動件52包括一中空長方體狀本體521，該本體521 之一端面上垂直延伸有二相對之第一固定片522及二相對 之第二固定片523。該第一固定片522及第二固定片523 用於連接液晶顯示屏41。該本體521之二側還分別開設有 三固定孔524。 該連接件53包括一矩形平板部531及由該平板部531 二相對側邊垂直該平板部531延伸形成之侧板532。該平 板部531中央開設有一卡合孔53U。該側板532上開設有 二定位孔5321。 該第一扭簧541包括一捲曲部5411及由該捲曲部 5411二端分別延伸出之二掛鉤5412。所述第二扭簣542 包括一捲曲部5421及由該捲曲部5421二端分別延伸出之 二掛鉤5422。 該第一連接組件55包括一連接軸551及一滾輪552。 該連接軸551包括一圓柱狀之軸體部5511及由該軸體部 5511二端分別延伸形成之第一凸柱5512及第二凸柱 5513。該轴體部5511之側壁上開設有一用於容納掛鉤542 之環形槽5514。該滾輪552用於可滑動地設於殼體510之 滑槽5121中，其由一滾軸5521和一圓形連接片5526鉚合 而成。該滾軸5521包括一圓柱形之基部5522及由該基部 5522二端分別延伸形成之帽體5523及插接部5524。該基 部5522沿其轴向開設有一接合孔5525。該連接片5526中 心開設有一鉚合孔5527，用於鉚接在插接部5524上。 201004539 該第二連接組件56包括一連接軸561、二第一墊片 562、一第二墊片563及一螺釘564。該連接轴561之一端 延伸有凸緣5611，且沿其轴向開設有一螺孔5612。 該第三連接組件57包括一連接轴571、一套筒572、 一墊片573及一螺釘574。該連接轴571之一端延伸有凸 緣5711，且沿其軸向開設有一螺孔5712。該套筒572為圓 筒形，其用於套設在連接軸571上。 裝配該升降機構50時，將二滑執組515藉由固定件分 別裝設於殼體510之二側擋板514，然後用固定件穿過滑 動件52之固定孔524及内滑執5155之固定孔5156，以將 滑動件52固設於内滑軌5155頂部，從而將滑動件52可滑 動地設於殼體510上。然後將滾輪552之滾軸5521穿過殼 體510之滑槽5121，並與連接片5526鉚合，以使滾輪552 可滑動地裝設於殼體510之滑槽5121中。接著將連接軸 551之第二凸柱5513部分插入滾輪552之接合孔5525中。 接著使連接軸551之第一凸柱5512插入連接件53之卡合 孔5311，並用固定件穿過連接件53之側板532上之定位 孔5321及内滑執5155之定位孔5157，從而將連接件53 固設於内滑軌5155底端。將第一扭簧541之一掛鉤5412 鉤設於連接軸551之環形槽5514中，將第二扭簧542之一 掛鉤5422鉤設於第二凸柱5513上。接著將螺釘564穿過 第二墊片563、一第一墊片562、第一扭簧541之另一掛鉤 5412、另一第一墊片562及殼體510上之第一通孔5122 後，螺入連接軸561之螺孔5612中。將螺釘574穿過墊片 10 201004539 563、第二扭簀542之另一掛鉤5422,套筒572及殼體510 上之第二通孔5123後，螺入連接軸571之螺孔5712中。 • 裝配完畢後，該第一扭簧541及第二扭簧542均設於 •基板512上且與基板512大致平行。該滑動件52及連接件 53可與内滑執5155 —起沿著外滑軌5151滑動，從而帶動 第一連接組件55沿著殼體510之滑槽5121滑動，以改變 第一扭簧541及第二扭簧542之扭曲程度，進而改變第一 扭簧541及第二扭簧542之扭力。而且由於第三連接組件 57包括套筒572，故第一扭簧541及第二扭簣542可在空 間上錯開一定距離，從而可防止該第一扭簧541及第二扭 簧542在滑動件52之滑動過程中發生干涉。 請參閱圖2至圖4，當使用升降機構50調節液晶顯示 屏41之高度時，只需向該液晶顯示屏41施加向下或向上 之作用力，以使該滑動件52相對支架51滑動，當滑動件 52運動至預定位置時，停止對液晶顯示屏41施加作用力， 滑動件52在第一扭簧541及第二扭簧542之扭力、内滑軌 5155與外滑軌5151之間之摩擦力以及滑動件52、連接件 53和液晶顯示屏41之重力之作用下達到平衡，從而停止 於該預定位置。 相較於習知升降機構，所述升降機構50之滑動件52 藉由滑軌組515可滑動地設於支架51上，且藉由第一扭簧 541及第二扭簧542與支架51相連，故在滑動件52之滑 動過程中，第一扭簀541或第二扭簧542之二掛鉤僅在一 定角度範圍内靠近或遠離，可長時間使用而不發生形變 11 201004539 故，該種升降機構50具有較長之使用壽命。另，藉由改變 第一、第二扭簧541、542之掛鉤5412、5422之長度，可 改變第一扭簧541或第二扭簧542之扭力臂大小，從而可 使該種升降機構50之滑動件52上裝設不同重量之負載。 此外，該第一扭簧541及第二扭簧542均設於基板512上 且與基板512大致平行，故該殼體51〇只需具有較小厚戶 即可’即該殼體510可薄型化。另外，相對採用齒輪與= 桿相配合之升降機構，該升降機構5〇主要以滑軌組Η?、 滑動件52、連接件53、第一扭簧541及第二扭簧542作為 升降元件，具有結構簡單，易於組裝之優點。 … 可以理解，本發明之升降機構5〇也可僅包括一扭簧， 只需將該扭簧之二端分別與連接件53及支架5ι相連即 可。該升降機構50也可不包括連接件53，而將第一扭菁 54i及第二扭簧542直接與滑動件％相連。另，該升降機 構50也可僅包括—滑執組，該滑動件％設於該滑軌组上。 综上所述’本發明符合發明專利要件，爰依法提出專 J凊。惟，以上所述者僅為本發明之較佳實施例，舉凡 ^悉本案技藝之人士 ’在援依本案發㈣神所作之等效修 飾或變化，皆應包含於以下之申請專利範圍内。 夕 【圖式簡單說明】 圖1疋種習知升降機構之立體分解圖。 圖。圖2是應用本發明升降機構之液晶顯示裝置之立體 圖3疋本發明較佳實施例之升降機構之立體圖。 12 201004539 圖4是圖3所示升降機構之立體分解圖。 【主要元件符號說明】 液晶顯示裝置 40 液晶顯不屏 41 底座 42 升降機構 50 支架 51 殼體 510 基板 512 側擋板 514 滑槽 5121 第一通孔 5122 第二通孔 5123 滑軌組 515 外滑轨 5151 滾珠軸承 5153 内滑轨 5155 滑動件 52 本體 521 第一固定片 522 第二固定片 523 固定孔 524 連接件 53 平板部 531 卡合孔 5311 側板 532 定位孔 5321 第一扭簧 541 捲曲部 5411 、 5421 掛鉤 5412、5422 第二扭簧 542 第一連接組件 55 連接轴 551 、 561 、 571 軸體部 5511 第一凸柱 5512 第二凸柱 5513 環形槽 5514 滾軸 5521 基部 5522 帽體 5523 插接部 5524 接合孔 5525 連接片 5526 鉚合孔 5527 第二連接組件 56 第一墊片 562 13 201004539 第二墊片 563 螺釘 564 > 574 凸緣 5611 螺孔 5612 第三連接組件 57 凸緣 5711 螺孔 5712 套筒 572 墊片 573 14201004539 IX. Description of the invention: [Technical field to which the invention pertains] In particular, the invention relates to an elevating mechanism for adjusting the height of a display screen of a lifting mechanism. [Prior Art] With the widespread use of computers, its functions have increased and improved, and its volume has also become thinner and thinner. By CRT (C Λ Ώ τ u in the liquid day display device relative to LRT (Cathode Ray Tube, cathode 妗; ^, 曰 ^ ^ θ, 丨 极 polar ray official) display has the advantages of small size, weight 1 light, so It gradually replaces CRT翩-„2, from ~K1 to become the main component of the computer: In order to facilitate people to view the LCD screen from different perspectives, it is customary to have a lifting mechanism on the liquid crystal display device to adjust the liquid crystal display. As shown in Fig. 1, the conventional lifting mechanism 100 for adjusting the height of the liquid crystal display includes: - a base 1G, a lifting block 2G, and a cabochon 3 〇. The base 10 has a channel u The channel n is provided with two opposite rails 12, and the outer edge of the channel U is provided with a fixing hole 13. The lifting block 20 can be inserted into the channel u of the base 10 and can be opposite to the base 1 The top of the lifting block 20 is provided with a connecting portion 21 connected to the liquid crystal display. The bottom end of the lifting block 20 is provided with two screw holes 22 (> one end of the coil spring 3 is fixed to the shaft cup 31 The two ends of the shaft 31 are respectively provided with fixing holes 311, and the fixing member 33 passes through the fixing holes 311 of the shaft 31 and the base. The fixing hole 13 of the seat 1 locks the shaft 31 to the base 1〇; the other end of the winding 3〇 is provided with a through hole 32 through which the fixing member 36 passes through the through hole 32 of the coil spring 3 And the screw hole 22 on the lifting block 20 locks the end of the coil spring 30 to the lifting block 201004539. When used, the pressure is pressed to connect the liquid crystal display connected to the lifting block 2〇, so that the lifting block 20 is lowered to the appropriate position. Position, and then release the hand, the gravity of the liquid crystal display and the lifting block 20 can be balanced with the restoring force of the coil spring 3, the friction between the lifting block 2〇 and the 2 seat 1〇 to make the lifting block 20 Positioning; if you want to raise the LCD screen, apply an upward thrust on the LCD screen. 'The thrust and the restoring force of the coil spring 30 can overcome the gravity of the LCD screen and the lifting block 20 and the lifting block 2〇 and the base 1 The friction between the crucibles raises the lifting block 20 to a predetermined position. However, the lifting mechanism 10〇 mainly balances the gravity of the liquid crystal display panel and the lifting block 2G by the restoring force of the coil spring 3,, and the volume After the spring % is stretched several times, the deformation is easy to occur, resulting in the coil spring 3 〇 no longer providing sufficient restoring force. Balance the weight of the liquid crystal display and the lifting block 2 (). Therefore, the lifting mechanism (10) has a shorter material life. In addition, since the restoring force of the coil spring is substantially constant, the lifting mechanism (10) can only be installed with a specific Load of the invention. [In view of the above], it is necessary to provide a lifting mechanism having a long service life and capable of mounting different weight loads. - The lifting mechanism includes a bracket, a sliding member and at least one twist The bracket is at least a sliding group, and the sliding member is slidably disposed on the bracket by the sliding rail group, and the two ends of the torsion spring are respectively connected to the bracket and the sliding member. Compared with the prior art, The sliding member of the lifting mechanism is slidably disposed on the bracket by the sliding group, and is connected to the bracket by the torsion spring. Therefore, during the sliding process of the sliding member, the two terminals of the torsion spring are only close to or within a certain angle range. 201004539 Keep away from 'can be used for a long time without deformation, so this kind of lifting mechanism has a long service life. In addition, by changing the length of the two ends of the torsion spring, the size of the arm of the twisting can be changed, so that the sliding members of the lifting mechanism can be loaded with different weights. [Embodiment] A preferred embodiment of the present invention discloses a lifting mechanism suitable for an electronic device with a display screen. In the present embodiment, a liquid crystal display device will be described as an example. Referring to FIG. 2, the liquid crystal display device 4 includes a liquid crystal display 41, a base 42 and a lifting mechanism 50 ° connecting component 56 connecting the liquid crystal display 41 and the base 42 , a third connecting component 57 and a plurality of fixing members ( The figure is not shown). The bracket 51 includes an installation body 51 and a second slip group 515. The housing 51 is also referred to FIG. 3 and FIG. 4 . The lifting mechanism 50 of the preferred embodiment includes a bracket 51 , a sliding member 52 , a connecting member 53 , a first torsion spring 541 , and a second portion . The torsion spring 542, a first connecting component %, a substrate 512 and two side baffles 5 i 4 extending from the opposite sides of the substrate 512 perpendicular to the substrate 512, the substrate 5 i 2 is provided with a middle portion Shape chute 5121. The substrate 512 further has a first through hole 5122 and a second through hole 5123 respectively on the two sides of the bottom of the sliding slot 5121. The sliding group 515 includes an outer sliding rail 5151, a ball bearing 5153 and an inner sliding portion. The top of the rail 5155 β Hai inner slide rail 5155 is provided with three fixing holes 5156, and the bottom portion is provided with two positioning holes 5157. The ball bearing 5153 is for coupling between the outer slide 5151 and the inner slide 5155 to reduce the friction between the outer slide 5 ΐ 5 ι and the inner slide 201004539 5155. The sliding member 52 includes a hollow rectangular parallelepiped body 521. One end surface of the body 521 vertically extends from the opposite first fixing piece 522 and the opposite second fixing piece 523. The first fixing piece 522 and the second fixing piece 523 are used to connect the liquid crystal display panel 41. The two sides of the body 521 are also respectively provided with three fixing holes 524. The connecting member 53 includes a rectangular flat plate portion 531 and a side plate 532 extending from the opposite side of the flat plate portion 531 perpendicularly to the flat plate portion 531. An engaging hole 53U is formed in the center of the flat plate portion 531. Two positioning holes 5321 are defined in the side plate 532. The first torsion spring 541 includes a curling portion 5411 and two hooks 5412 extending from the two ends of the curling portion 5411. The second twist 542 includes a curling portion 5421 and two hooks 5422 extending from the two ends of the curling portion 5421. The first connecting component 55 includes a connecting shaft 551 and a roller 552. The connecting shaft 551 includes a cylindrical shaft portion 5511 and a first protrusion 5512 and a second protrusion 5513 extending from the two ends of the shaft portion 5511. An annular groove 5514 for receiving the hook 542 is defined in the side wall of the shaft body portion 5511. The roller 552 is slidably disposed in the sliding slot 5121 of the housing 510 and is riveted by a roller 5521 and a circular connecting piece 5526. The roller 5521 includes a cylindrical base portion 5522 and a cap body 5523 and a plug portion 5524 extending from the two ends of the base portion 5522. The base portion 5522 defines an engagement hole 5525 along its axial direction. A rivet hole 5527 is defined in the center of the connecting piece 5526 for riveting on the insertion portion 5524. 201004539 The second connecting component 56 includes a connecting shaft 561, two first spacers 562, a second spacer 563 and a screw 564. One end of the connecting shaft 561 extends with a flange 5611, and a screw hole 5612 is defined in the axial direction thereof. The third connecting component 57 includes a connecting shaft 571, a sleeve 572, a spacer 573 and a screw 574. One end of the connecting shaft 571 extends with a flange 5711, and a screw hole 5712 is defined along the axial direction thereof. The sleeve 572 has a cylindrical shape for being sleeved on the connecting shaft 571. When the lifting mechanism 50 is assembled, the two sliding groups 515 are respectively mounted on the two side baffles 514 of the housing 510 by fixing members, and then passed through the fixing holes 524 of the sliding member 52 and the inner sliding handles 5155 by the fixing members. A hole 5156 is fixed to fix the slider 52 to the top of the inner rail 5155, so that the slider 52 is slidably disposed on the housing 510. The roller 5521 of the roller 552 is then passed through the sliding slot 5121 of the housing 510 and riveted to the connecting piece 5526 so that the roller 552 is slidably mounted in the sliding slot 5121 of the housing 510. Then, the second boss 5513 of the connecting shaft 551 is partially inserted into the engaging hole 5525 of the roller 552. Then, the first protrusion 5512 of the connecting shaft 551 is inserted into the engaging hole 5311 of the connecting member 53, and the fixing member passes through the positioning hole 5321 of the side plate 532 of the connecting member 53 and the positioning hole 5157 of the inner sliding 5155, thereby connecting. The piece 53 is fixed to the bottom end of the inner slide rail 5155. A hook 5412 of the first torsion spring 541 is hooked into the annular groove 5514 of the connecting shaft 551, and a hook 1522 of the second torsion spring 542 is hooked on the second protrusion 5513. Then, the screw 564 is passed through the second spacer 563, a first spacer 562, the other hook 5412 of the first torsion spring 541, the other first spacer 562, and the first through hole 5122 of the housing 510. Screw into the screw hole 5612 of the connecting shaft 561. The screw 574 is threaded into the screw hole 5712 of the connecting shaft 571 after passing through the spacer 10 201004539 563, the other hook 5422 of the second twist 542, the sleeve 572 and the second through hole 5123 of the housing 510. • After assembly, the first torsion spring 541 and the second torsion spring 542 are both disposed on the substrate 512 and substantially parallel to the substrate 512. The sliding member 52 and the connecting member 53 can slide along the outer sliding rail 5151 together with the inner sliding handle 5155 to drive the first connecting component 55 to slide along the sliding slot 5121 of the housing 510 to change the first torsion spring 541 and The degree of distortion of the second torsion spring 542, thereby changing the torsion of the first torsion spring 541 and the second torsion spring 542. Moreover, since the third connecting component 57 includes the sleeve 572, the first torsion spring 541 and the second twisting 542 can be spatially offset by a certain distance, thereby preventing the first torsion spring 541 and the second torsion spring 542 from being in the sliding member. Interference occurred during the sliding of 52. Referring to FIG. 2 to FIG. 4, when the height of the liquid crystal display panel 41 is adjusted by using the lifting mechanism 50, only a downward or upward force is applied to the liquid crystal display panel 41 to slide the slider 52 relative to the bracket 51. When the slider 52 is moved to the predetermined position, the application of the force to the liquid crystal display 41 is stopped. The slider 52 is between the torque of the first torsion spring 541 and the second torsion spring 542, and between the inner slide rail 5155 and the outer slide rail 5151. The frictional force and the gravity of the slider 52, the connecting member 53, and the liquid crystal display panel 41 are balanced to stop at the predetermined position. Compared with the conventional lifting mechanism, the sliding member 52 of the lifting mechanism 50 is slidably disposed on the bracket 51 by the slide rail group 515, and is connected to the bracket 51 by the first torsion spring 541 and the second torsion spring 542. Therefore, during the sliding process of the sliding member 52, the two hooks of the first twisting 541 or the second torsion spring 542 are close to or away from each other only within a certain angle range, and can be used for a long time without deformation 11 201004539, therefore, the lifting Mechanism 50 has a long service life. In addition, by changing the lengths of the hooks 5412 and 5422 of the first and second torsion springs 541 and 542, the magnitude of the torsion arm of the first torsion spring 541 or the second torsion spring 542 can be changed, so that the lifting mechanism 50 can be Loads of different weights are mounted on the slider 52. In addition, the first torsion spring 541 and the second torsion spring 542 are both disposed on the substrate 512 and substantially parallel to the substrate 512. Therefore, the housing 51 〇 only needs to have a small thicker household, that is, the housing 510 can be thin. Chemical. In addition, the lifting mechanism 5 〇 is mainly a pair of sliding rails, a sliding member 52, a connecting member 53, a first torsion spring 541 and a second torsion spring 542 as lifting elements. The utility model has the advantages of simple structure and easy assembly. It can be understood that the lifting mechanism 5 of the present invention may also include only a torsion spring, and only the two ends of the torsion spring may be connected to the connecting member 53 and the bracket 5ι, respectively. The lifting mechanism 50 may also include the connecting member 53 and directly connect the first torsion cyanine 54i and the second torsion spring 542 to the sliding member %. In addition, the elevator mechanism 50 may also include only a sliding group, and the sliding member is disposed on the sliding rail group. In summary, the invention conforms to the patent requirements of the invention, and is proposed in accordance with the law. However, the above description is only the preferred embodiment of the present invention, and those who have learned the skill of the present invention should be included in the following patent claims within the scope of the patent application. .夕 [Simplified illustration of the drawings] Figure 1 is an exploded perspective view of a conventional lifting mechanism. Figure. Figure 2 is a perspective view of a liquid crystal display device to which the elevating mechanism of the present invention is applied. Figure 3 is a perspective view of the elevating mechanism of the preferred embodiment of the present invention. 12 201004539 Figure 4 is an exploded perspective view of the lifting mechanism shown in Figure 3. [Main component symbol description] Liquid crystal display device 40 Liquid crystal display screen 41 Base 42 Lifting mechanism 50 Bracket 51 Housing 510 Substrate 512 Side dam 514 Chute 5121 First through hole 5122 Second through hole 5123 Slide group 515 Sliding Rail 5151 Ball bearing 5153 Inner rail 5155 Sliding member 52 Main body 521 First fixing piece 522 Second fixing piece 523 Fixing hole 524 Connecting piece 53 Flat plate portion 531 Engagement hole 5311 Side plate 532 Positioning hole 5321 First torsion spring 541 Curing portion 5411 5421 Hook 5412, 5422 Second torsion spring 542 First connecting component 55 Connecting shaft 551, 561, 571 Shaft body 5511 First stud 5512 Second stud 5513 Annular groove 5514 Roller 5521 Base 5522 Cap 5523 Plug Port 5524 Engagement hole 5525 Connecting piece 5526 Riveting hole 5527 Second connection assembly 56 First spacer 562 13 201004539 Second spacer 563 Screw 564 > 574 Flange 5611 Screw hole 5612 Third connection assembly 57 Flange 5711 Screw hole 5712 sleeve 572 gasket 573 14