1377139 六、發明說明： 【發明所屬之技術領域】 * 本發明涉及一種幼兒安全座椅組合體，特別涉及一種 ' 設有座椅角度調整裝置的幼兒安全座椅組合體。 【先前技術】 圖1爲美國第US 5,890,762號專利所示之習知車用座椅 φ 角度調整裝置1，其中的滑塊11在引導柱12的引導之下可 相對於固定塊14滑動。當滑塊11縱向滑動時，滑塊11連動 卡合桿15沿著斜向槽17運動，使得卡合桿15同時在橫向產 生位移。當卡合桿15產生橫向位移時，卡合桿15的末端可 脫離座椅的對應凹部（未示），此時可調整座椅的角度。 但是因爲卡合桿15沿著斜向槽17運動時，同時產生縱 向位移和橫向位移，其中的縱向位移會使卡合桿15貼緊座 椅的對應凹部，此現象增加滑塊11相對於固定塊14運動的 φ 阻力，使得使用者感覺不順暢。 此外上述習知座椅角度調整裝置1的構造複雜，增加 製造和組裝的成本。 【發明內容】 因此，本發明的目的在於提供一種幼兒安全座椅組合 體，使用其調整裝置時感覺順暢。 本發明的另一目的在於提供一種幼兒安全座椅組合體 ，其構造簡單，且製造和安裝成本低。 -5- 1377139 於是，本發明一種一種幼兒安全座椅組合體，包含： —底座：一座椅，具有複數個定位孔，該座椅可相對滑動 地設置於該底座上；和一調整裝置，該調整裝置包括：一 主體部，可滑動地設置在該底座：一撓性部，連接該主體 部；一定位端部，連接該撓性部，當該主體部滑動時帶動 該定位端部選擇性地容置在該複數定位孔其中之一內。 優選地，該組合體更包括設置在該底座的一引導機構 ，用以改變該撓性部之運動方向，使該定位端部之移動方 向與該主體部之滑動方向不同。 優選地，該引導機構包括複數肋部。 優選地，該等肋部包括複數個導向肋部及複數個限位 肋部，該等導向肋部用以改變該撓性部之運動方向，該等 限位肋部用以限制該定位端部之運動方向。 優選地，該導向肋部爲弧形。 優選地，該組合體另外包含彈性件，該彈性件連接該 調整裝置和該底座。 優選地，該定位端部的運動方向和該主體部的運動方 向實質上垂直。 優選地，該調整裝置另外包括一容置槽，該底座另外 包括一凸部，該凸部容置在該容置槽內使該底座及該調整 裝置可相對滑動。 優選地，該座椅包括一滑軌，該底座具有一滑槽，該 滑軌可滑動地容置於該滑槽內。 優選地，該複數定位孔實質上沿一滑動方向形成在該 -6- 1377139 滑軌上。 優選地，該座椅包括從該滑軌橫向延伸的凸緣，該底 ' 座包括一凹槽，該凹槽連通於該滑槽，該凸緣可滑動地容 置於該凹槽內。 優選地，該底座包括一台階，連接該凹槽之底面和該 滑槽之底面。 優選地，該座椅包括一擋塊，用以干涉該底座，藉此 φ 限制該座椅相對於該底座之移動範圍。 優選地，該擋塊位於該凸緣上。 優選地，該擋塊位於該凸緣之前端或後端。 優選地，該底座包括一凹槽擴大部和位於該凹槽擴大 部內的一肩部，該擋塊用以與該肩部干涉，藉此限制該座 椅相對於該底座之移動範圍。 優選地，該底座包括一洞，該定位端部可滑動地容置 在該洞內。 Φ 優選地，該底座包括一底座上蓋和一底座下蓋，該引 導機構和該洞位於該底座上蓋。 本發明的另一方面提供一種幼兒安全座椅組合體的調 整裝置，該調整裝置包括：一主體部；一撓性部，從該主 體部向外延伸：一定位端部，連接至該撓性部；和一引導 機構，用以改變該撓性部之運動方向，使該定位端部的滑 動方向和該主體部的滑動方向實質上相垂直。 優選地，該安全座椅組合體包括一底座及一座椅，該 座椅可相對滑動地設置於該底座上，其中，該調整裝置更 1377139 包括設置於該座椅上的複數定位孔’該定位端部選擇性地 容置在該複數定位孔其中之一內’用以將該座椅定位於該 底座上。 優選地，該引導機構包括複數肋部及複數定位孔，該 複數肋部設置於該底座上，該複數定位孔設置於座椅上’ 該定位端部選擇性地容置在該複數定位孔其中之一內，用 以將該座椅定位於該底座上。 優選地，該主體部、該撓性部及該定位端部一體成形 〇 本發明的又一方面提供一種幼兒安全座椅組合體，其 包括：一底座，具有一對滑槽，該滑槽爲圓弧形；一座椅 ，具有一對滑軌，該對滑軌爲圓弧形，該對滑軌對應設置 於該對滑槽內，使該座椅可相對該底座滑動。 優選地，該對滑軌上分別具有一凸緣，該對滑槽分別 於其槽壁上設置有一凹槽，該凸緣可滑動地設置於該凹槽 內、。 本發明相較於現有技術的優點包括：使用調整裝置時 感覺順暢，且組合體的構造簡單，所以製造和安裝成本低 〇 熟悉此技術者可在閱讀說明書之後，更瞭解請求項中 所界定之發明的其他好處和其他目的。 【實施方式】 如圖2、3所示，本發明的幼兒安全座椅組合體2包含 1377139 座椅3、底座4、調整裝置5、和彈性件6。 如圖3、4、5所示，該座椅3包括座部31、設置於座部 31下面的二圓弧形滑軌32、自每一滑軌32內側面橫向延伸 ‘ 的圓弧形凸緣33、分別位於凸緣33前端及後端的兩擋塊34 、和形成在滑軌32內側面且在凸緣33上方的複數定位孔35 。如圖5所例示，該複數定位孔3 5進一步包括相互靠近的 三個第一定位孔35a和一個遠離的第二定位孔35b。 φ 在本實施例中，滑軌的32的圓弧具有一圓心Ο。位於 凸緣33前端的擋塊34是由凸緣33前端向斜上方一體地延伸 。至於位於凸緣33後端附近的擋塊34可由凸緣33後端附近 向圓弧形凸緣3 3的圓心0徑向地且一體地延伸、或者該後 擋塊34也可與凸緣33分離地設置。 該底座4包括彼此組合在一起的底座上蓋41和底座下 蓋42。該底座上蓋41具有分別形成在兩側的二圓弧形滑槽 411、形成在每一滑槽之其中一側壁內且與滑槽411相連通 φ 的圓弧形凹槽412、形成在滑槽411之該側壁內且位於凹槽 412上方的洞413、連接凹槽412之底面和和滑槽411之底面 . 的台階414、形成在凹槽412之前端的凹槽擴大部415、分 別形成在凹槽擴大部415內和凹槽412之後端的兩肩部416 、和形成在底座上蓋41之底表面的複數引導機構417。該 等引導機構41 7進一步包括複數弧形凸肋和複數直線形凸 肋；每兩個相鄰的弧形凸肋構成一組且稱爲導向肋部417a ;每兩個相鄰的直線形凸肋構成一組且稱爲限位肋部417b 。該底座下蓋42具有形成在中間的凸部421。上述滑軌32 -9 * 1377139 、凸緣33、滑槽32、和凹槽412之圓弧的曲率半徑可大致 相對應，因此可以達到平順調整座椅傾斜角度的功效。 該調整裝置5包括主體部51、自主體部51兩側向外呈 弧形延伸的二撓性部52、位於每一撓性部52之自由端的定 位端部53、和形成在主體部51後半部份的容置槽54。 組裝 如圖3、5、6所示，首先將調整裝置5放在底座上蓋41 的底表面上，使得調整裝置5的撓性部52位於一組導向肋 部41 7a之間，且定位端部53的後半部容置在另一組限位肋 部41 7b之間，使定位端部53的前半部對準底座上蓋41的洞 4 13° 其次安裝彈性件6，使得彈性件6的兩端分別抵靠在主 體部51和底座上蓋41。然後將底座上蓋41和底座下蓋42組 合在一起，並使底座下蓋42的凸部421容置在調整裝置5的 容置槽54內。 接下來，將座椅的兩滑軌3 2從橫方向放入底座上蓋41 的滑槽411內，並使凸緣33容置在凹槽412內，且前後兩擋 塊34皆位於凹槽412的前後端之外。然後，將座部31組裝 至兩滑軌32。 調整操作 如圖6所示，當未按押調整裝置5的主體部51時，定位 端部53局部突出底座上蓋41的洞413，並容置於座椅3的其 -10- 中一個第一定位孔35a內，而將座椅3相對於底座4固定在 某一角度成如圖7所示。此時幼兒安全座椅組合體2位於前 向使用狀態（幼兒朝向行車方向）。 如圖8所示，當按押調整裝置5的主體部51時，主體部 51在凸部421的引導下滑動，主體部51的滑動會壓縮彈性 件6並連動撓性件52和定位端部53。由於導向肋部41 7a呈 弧形設計，故可將容置於其中的撓性部52彎曲，進而改變 撓性部52的運動方向，使主體部51的運動方向與定位端部 53的運動方向實質上相互垂直。因此，定位端部53在橫向 上移動，和主體部51之縱向相垂直，直到完全脫離座椅3 的第一定位孔35a。此時使用者可推動座椅3，使滑軌3 2沿 著滑槽411 (圖3)滑動，同時使用者不再按押主體部51， 主體部51在彈性件6的恢復力作用下回原來的位置。主體 部5 1也再度連動撓性部52和定位端部53，使定位端部53在 橫向上再度突出底座上蓋41的洞413，並插入座椅3的另一 第一定位孔35a，藉此改變座椅3相對於底座4的角度成如 圖9所示，此時幼兒安全座椅組合體2仍位於前向使用狀態 (幼兒朝向行車方向）。 如果再重複上述調整操作，但是使定位端部53插入第 二定位孔35b，此時座椅3的傾斜角度較大，使幼兒能夠平 躺。如果再把底座4相對於車體（未示）旋轉180度成如圖 1 0所示，此時幼兒安全座椅組合體2位於後向使用狀態（ 幼兒背對行車方向）。 上述座椅3的滑軌32容置在底座上蓋41的滑槽411內， 1377139 且凸緣33容置在凹槽412內，除了因爲該等圓弧的曲率半 徑大致相對應而具有滑動順暢的功效之外，尙可防止座椅 3在橫方向傾倒及脫離底座上蓋41。 當座椅3相對於底座4向後滑動至極限位置時，凸緣33 前端的擋塊34容置在凹槽擴大部415並抵接凹槽靠擴大部 415內的肩部416，藉此防止座椅3相對於底座4過度向後滑 動或脫離底座4。當座椅3相對於底座4向前滑動至極限位 置時，凸緣33後端附近的擋塊34抵靠凹槽412後端的肩部 416，藉此防止座椅3相對於底座4過度向前滑動或脫離底 座4。 從上述的調整操作中可知，調整裝置5的本體部51和 定位端部53分別在縱向和橫向上運動，且本體部51和定位 端部53藉由撓性部52連接，因此定位端部53在座椅3之定 位孔3 5內滑動時，定位端部5 3和定位孔3 5之內壁間無摩擦 阻力，所以操作調整裝置5時感覺順暢。此外，本發明的 調整裝置5爲一體成形之單件式元件，而非由多個元件組 裝而成，因此製造和組裝成本較低。 其他實施例 在另一實施例中，凸部421可形成在底座上蓋41的底 表面，藉此省略底座下蓋42。 在另一實施例中，調整裝置5可包括上述的主體部51 、撓性部52、定位端部53、容置槽54、和引導機構417。 此實施例中的引導機構417可包括上述的定位孔35、導向 -12- 1377139 肋部417a、和限位肋部417b。 但以上所述，僅爲本發明的較佳實施例而已，當不能 以此限定本發明實施的範圍，即大凡依本發明申請專利範 圍及發明說明書內容所作之簡單的等效變化與修飾，皆應 仍屬本發明專利涵蓋的範圍內》 【圖式簡單說明】 上文藉由最佳實施例及附圖對本發明的幼兒安全座椅 組合體和其調整裝置進行詳細說明，但圖式不一定依照真 正的比例繪製，因此本發明並不限定於圖式中的比例。附 圖中： 圖1是習知技術的局部立體組合圖； 圖2是本發明之立體組合圖； 圖3是本發明之立體分解圖： 圖4是本發明之組合前視圖； 圖5是沿著圖4之線V-V所取的剖視圖； 圖6是沿著圖4之線VI-VI所取的剖視圖； 圖7是圖2的側視圖， 圖8是類似於圖6的剖視圖，但調整裝置的位置不同； 圖9是類似於圖7的側視圖，但座椅相對於底座的角度 不同： 圖1 0是類似於圖7的側視圖，但座椅相對於底座的角 度不同，且座椅和底座相對於車體旋轉18〇度’以使座椅 中之幼兒的臉朝車子後面。 -13- 1377139 【主要元件符號說明】 1 :習知座椅角度調整裝置 2:幼兒安全座椅組合體 3 :座椅 4 :底座 5 :調整裝置 6 :彈性件 1 1 :滑塊 12 :引導柱 14 :固定塊 15 :卡合桿 1 7 :斜向槽 31 :座部 32 :滑軌 33 :凸緣 34 :擋塊 3 5 :定位孔 3 5 a :第一定位孔 3 5 b :第二定位孔 41 :底座上蓋 42 :底坐下蓋 51 :主體部 52 :撓性部 -14 1377139 5 3 :定位端部 54 :容置槽 411 :滑槽 4 1 2 :凹槽 413 :洞 414 :台階 415 :凹槽擴大部 4 1 6 ·肩部 417 :引導機構 417a :導向肋部 4 17b :限位肋部 421 :凸部1377139 VI. Description of the Invention: [Technical Field] The present invention relates to a child safety seat assembly, and more particularly to a child safety seat assembly having a seat angle adjusting device. [Prior Art] Fig. 1 shows a conventional vehicle seat φ angle adjusting device 1 shown in U.S. Patent No. 5,890,762, in which the slider 11 is slidable relative to the fixed block 14 under the guidance of the guide post 12. When the slider 11 is longitudinally slid, the slider 11 interlocks the movement of the engagement lever 15 along the oblique groove 17, so that the engagement lever 15 is simultaneously displaced in the lateral direction. When the engagement lever 15 produces a lateral displacement, the distal end of the engagement lever 15 can be disengaged from the corresponding recess (not shown) of the seat, at which point the angle of the seat can be adjusted. However, since the engaging rod 15 moves along the oblique groove 17, the longitudinal displacement and the lateral displacement are simultaneously generated, wherein the longitudinal displacement causes the engaging rod 15 to abut the corresponding recess of the seat, which increases the slider 11 relative to the fixed portion. The φ resistance of the movement of the block 14 makes the user feel uncomfortable. Further, the above-described conventional seat angle adjusting device 1 has a complicated structure, which increases the cost of manufacturing and assembly. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a child safety seat assembly that feels smooth when using the adjustment device. Another object of the present invention is to provide a child safety seat assembly that is simple in construction and low in manufacturing and installation costs. -5- 1377139 Thus, the present invention provides a child safety seat assembly comprising: a base: a seat having a plurality of positioning holes, the seat being slidably disposed on the base; and an adjusting device The adjusting device comprises: a main body portion slidably disposed on the base: a flexible portion connecting the main body portion; a positioning end portion connecting the flexible portion, and driving the positioning end portion when the main body portion is slid Suitably accommodated in one of the plurality of positioning holes. Preferably, the assembly further includes a guiding mechanism disposed on the base for changing a direction of movement of the flexible portion such that a moving direction of the positioning end is different from a sliding direction of the main portion. Preferably, the guiding mechanism comprises a plurality of ribs. Preferably, the ribs include a plurality of guiding ribs for changing a moving direction of the flexible portion, and a plurality of limiting ribs for limiting the positioning end The direction of movement. Preferably, the guiding rib is curved. Preferably, the assembly further comprises an elastic member that connects the adjustment device and the base. Preferably, the direction of movement of the positioning end is substantially perpendicular to the direction of motion of the body portion. Preferably, the adjusting device further comprises a receiving groove, the base further comprising a convex portion, the convex portion being received in the receiving groove to allow the base and the adjusting device to slide relative to each other. Preferably, the seat includes a slide rail, and the base has a sliding slot, and the slide rail is slidably received in the sliding slot. Preferably, the plurality of positioning holes are formed on the -6 - 1377139 slide rail substantially in a sliding direction. Preferably, the seat includes a flange extending laterally from the slide rail, the base portion including a recess that communicates with the chute, the flange being slidably received within the recess. Preferably, the base includes a step connecting the bottom surface of the recess and the bottom surface of the sliding slot. Preferably, the seat includes a stop for interfering with the base whereby φ limits the range of movement of the seat relative to the base. Preferably, the stop is located on the flange. Preferably, the stop is located at the front or rear end of the flange. Preferably, the base includes a recessed portion and a shoulder portion in the recessed portion of the recess for interference with the shoulder, thereby limiting a range of movement of the seat relative to the base. Preferably, the base includes a hole in which the positioning end is slidably received. Φ Preferably, the base includes a base upper cover and a base lower cover, and the guiding mechanism and the hole are located on the base upper cover. Another aspect of the present invention provides an adjustment device for a child safety seat assembly, the adjustment device comprising: a main body portion; a flexible portion extending outward from the main body portion: a positioning end portion connected to the flexible portion And a guiding mechanism for changing a moving direction of the flexible portion such that a sliding direction of the positioning end portion is substantially perpendicular to a sliding direction of the main body portion. Preferably, the safety seat assembly includes a base and a seat, the seat is slidably disposed on the base, wherein the adjusting device 1377139 includes a plurality of positioning holes disposed on the seat. A positioning end is selectively received in one of the plurality of locating holes for positioning the seat on the base. Preferably, the guiding mechanism comprises a plurality of ribs disposed on the base, the plurality of positioning holes are disposed on the seat, and the positioning end is selectively received in the plurality of positioning holes In one of the steps, the seat is positioned on the base. Preferably, the main body portion, the flexible portion and the positioning end portion are integrally formed. According to still another aspect of the present invention, a child safety seat assembly includes: a base having a pair of sliding slots, wherein the sliding slot is a circular arc shape; a seat having a pair of sliding rails, the pair of sliding rails being arc-shaped, the pair of sliding rails being correspondingly disposed in the pair of sliding slots, so that the seat can slide relative to the base. Preferably, the pair of slide rails respectively have a flange, and the pair of sliding slots are respectively provided with a groove on the groove wall thereof, and the flange is slidably disposed in the groove. Advantages of the present invention over the prior art include: smooth feel when using the adjustment device, and the construction of the assembly is simple, so the manufacturing and installation costs are low. Those skilled in the art can understand the definitions in the claims after reading the instructions. Other benefits of the invention and other purposes. [Embodiment] As shown in Figs. 2 and 3, the child safety seat assembly 2 of the present invention comprises a 1377139 seat 3, a base 4, an adjusting device 5, and an elastic member 6. As shown in FIGS. 3, 4, and 5, the seat 3 includes a seat portion 31, two circular arc-shaped slide rails 32 disposed under the seat portion 31, and a circular arc-shaped convex portion extending laterally from the inner side surface of each of the slide rails 32. The rim 33 has two stoppers 34 at the front end and the rear end of the flange 33, and a plurality of positioning holes 35 formed on the inner side surface of the slide rail 32 above the flange 33. As illustrated in Fig. 5, the plurality of positioning holes 35 further includes three first positioning holes 35a and a second positioning hole 35b which are apart from each other. φ In the present embodiment, the arc of the slide 32 has a center Ο. The stopper 34 located at the front end of the flange 33 is integrally extended obliquely upward from the front end of the flange 33. As for the stopper 34 located near the rear end of the flange 33, the vicinity of the rear end of the flange 33 may extend radially and integrally toward the center 0 of the circular arc flange 33, or the rear stopper 34 may be combined with the flange 33. Set separately. The base 4 includes a base upper cover 41 and a base lower cover 42 which are combined with each other. The base upper cover 41 has two circular arc-shaped sliding grooves 411 respectively formed on two sides, and a circular arc-shaped groove 412 formed in one of the side walls of each sliding groove and communicating with the sliding groove 411, formed in the sliding groove a hole 413 in the side wall of the 411, a hole 413 above the groove 412, a bottom surface of the connecting groove 412 and a bottom surface of the sliding groove 411, and a groove expanding portion 415 formed at the front end of the groove 412 are respectively formed in the concave The shoulder portion 416 in the groove enlarged portion 415 and the rear end of the groove 412, and a plurality of guiding mechanisms 417 formed on the bottom surface of the base upper cover 41. The guiding mechanism 41 7 further includes a plurality of curved ribs and a plurality of linear ribs; each of the two adjacent arcuate ribs constitutes a group and is referred to as a guiding rib 417a; each two adjacent linear protrusions The ribs form a group and are referred to as limit ribs 417b. The base lower cover 42 has a convex portion 421 formed in the middle. The radius of curvature of the arcs of the above-mentioned slide rails 32 -9 * 1377139, the flanges 33, the chutes 32, and the recesses 412 can be substantially corresponding, so that the effect of smoothly adjusting the tilt angle of the seat can be achieved. The adjusting device 5 includes a main body portion 51, two flexible portions 52 extending outward from both sides of the main body portion 51, a positioning end portion 53 at a free end of each flexible portion 52, and a second half formed in the main body portion 51. Part of the receiving groove 54. As shown in Figures 3, 5 and 6, the adjustment device 5 is first placed on the bottom surface of the base cover 41 such that the flexible portion 52 of the adjustment device 5 is located between the set of guide ribs 41 7a and the positioning end The rear half of the 53 is received between the other set of limiting ribs 41 7b such that the front half of the positioning end 53 is aligned with the hole 4 of the base cover 41. The elastic member 6 is then attached so that both ends of the elastic member 6 are provided. They abut against the main body portion 51 and the base upper cover 41, respectively. Then, the base upper cover 41 and the base lower cover 42 are assembled, and the convex portion 421 of the base lower cover 42 is received in the receiving groove 54 of the adjusting device 5. Next, the two slide rails 3 2 of the seat are placed into the sliding slot 411 of the base cover 41 from the lateral direction, and the flanges 33 are received in the recesses 412, and the front and rear two stops 34 are located in the recesses 412. Outside the front and rear ends. Then, the seat portion 31 is assembled to the two slide rails 32. The adjustment operation is as shown in FIG. 6. When the main body portion 51 of the adjusting device 5 is not pressed, the positioning end portion 53 partially protrudes from the hole 413 of the base upper cover 41 and is accommodated in the first one of the seats 3 of the seat 3. The inside of the hole 35a is positioned, and the seat 3 is fixed at an angle with respect to the base 4 as shown in FIG. At this time, the child safety seat assembly 2 is in the forward use state (the child is facing the driving direction). As shown in Fig. 8, when the main body portion 51 of the adjusting device 5 is pushed, the main body portion 51 slides under the guidance of the convex portion 421, and the sliding of the main body portion 51 compresses the elastic member 6 and interlocks the flexure 52 and the positioning end portion. 53. Since the guiding ribs 41 7a are curved, the flexible portion 52 accommodated therein can be bent, thereby changing the moving direction of the flexible portion 52, and the moving direction of the main body portion 51 and the moving direction of the positioning end portion 53. Essentially perpendicular to each other. Therefore, the positioning end portion 53 is moved in the lateral direction, perpendicular to the longitudinal direction of the main body portion 51, until it is completely separated from the first positioning hole 35a of the seat 3. At this time, the user can push the seat 3 to slide the slide rail 3 along the sliding slot 411 (Fig. 3), and the user no longer presses the main body portion 51, and the main body portion 51 is returned by the restoring force of the elastic member 6. original position. The main body portion 51 also interlocks the flexible portion 52 and the positioning end portion 53 again, so that the positioning end portion 53 re-emphasizes the hole 413 of the base upper cover 41 in the lateral direction, and is inserted into the other first positioning hole 35a of the seat 3, thereby The angle of the seat 3 relative to the base 4 is changed as shown in Fig. 9, at which time the child safety seat assembly 2 is still in the forward use state (the child is facing the driving direction). If the above adjustment operation is repeated, but the positioning end portion 53 is inserted into the second positioning hole 35b, the inclination angle of the seat 3 is large at this time, so that the child can lie flat. If the base 4 is rotated 180 degrees with respect to the vehicle body (not shown) as shown in Fig. 10, the child safety seat assembly 2 is in the backward use state (the child is facing away from the driving direction). The slide rail 32 of the seat 3 is received in the sliding slot 411 of the base upper cover 41, 1377139 and the flange 33 is received in the recess 412, except that the curvature radius of the arcs substantially corresponds to the sliding smoothly. In addition to the effect, the crucible prevents the seat 3 from being tilted in the lateral direction and disengaged from the base upper cover 41. When the seat 3 is slid rearward relative to the base 4 to the extreme position, the stop 34 at the front end of the flange 33 is received in the groove enlarged portion 415 and abuts against the shoulder 416 in the recessed portion 415, thereby preventing the seat The chair 3 slides excessively rearward or away from the base 4 with respect to the base 4. When the seat 3 is slid forward relative to the base 4 to the extreme position, the stop 34 near the rear end of the flange 33 abuts the shoulder 416 at the rear end of the recess 412, thereby preventing the seat 3 from being excessively forward relative to the base 4. Slide or disengage from the base 4. As can be seen from the above-described adjustment operation, the body portion 51 and the positioning end portion 53 of the adjusting device 5 move in the longitudinal direction and the lateral direction, respectively, and the body portion 51 and the positioning end portion 53 are connected by the flexible portion 52, so the positioning end portion 53 is positioned. When sliding in the positioning hole 35 of the seat 3, there is no frictional resistance between the positioning end portion 53 and the inner wall of the positioning hole 35, so that the adjustment device 5 feels smooth when operating. Further, the adjusting device 5 of the present invention is an integrally formed one-piece member, and is not assembled of a plurality of members, so that the manufacturing and assembly cost is low. Other Embodiments In another embodiment, the convex portion 421 may be formed on the bottom surface of the base upper cover 41, thereby omitting the base lower cover 42. In another embodiment, the adjustment device 5 can include the body portion 51, the flexible portion 52, the positioning end portion 53, the receiving groove 54, and the guiding mechanism 417 described above. The guiding mechanism 417 in this embodiment may include the above-described positioning hole 35, the guide -12-1377139 rib 417a, and the limiting rib 417b. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the contents of the invention are all It should still be within the scope of the present invention. [Simplified description of the drawings] The child safety seat assembly and the adjusting device thereof of the present invention are described in detail by the preferred embodiment and the accompanying drawings, but the drawings are not necessarily The drawing is based on true scale, and thus the invention is not limited to the proportions in the drawings. 1 is a perspective assembled view of the prior art; FIG. 2 is a perspective exploded view of the present invention; FIG. 3 is a perspective exploded view of the present invention: FIG. 4 is a front view of the combination of the present invention; Figure 6 is a cross-sectional view taken along line VI-VI of Figure 4; Figure 7 is a side view of Figure 2, Figure 8 is a cross-sectional view similar to Figure 6, but the adjustment device Figure 9 is a side view similar to Figure 7, but with different angles of the seat relative to the base: Figure 10 is a side view similar to Figure 7, but with different angles of the seat relative to the base, and the seat The base is rotated 18 degrees relative to the body so that the face of the child in the seat faces the back of the car. -13- 1377139 [Description of main component symbols] 1 : Conventional seat angle adjustment device 2: Child safety seat assembly 3: Seat 4: Base 5: Adjustment device 6: Elastic member 1 1 : Slider 12: Guide Column 14: fixing block 15: engaging lever 17: oblique groove 31: seat 32: sliding rail 33: flange 34: stopper 3 5: positioning hole 3 5 a : first positioning hole 3 5 b : Two positioning holes 41: base upper cover 42: bottom sitting cover 51: main body portion 52: flexible portion-14 1377139 5 3 : positioning end portion 54: receiving groove 411: chute 4 1 2: groove 413: hole 414 : step 415 : groove enlarged portion 4 1 6 · shoulder portion 417 : guiding mechanism 417 a : guiding rib portion 4 17b : limiting rib portion 421 : convex portion