TWM275830U - Pillow adjustment mechanism of dental chair - Google Patents

Description

M275830 M275830 八 新型說明： 、 【新型所屬之技術領域】 【先耵技術】 椅具按而!娜接受牙科醫師診斷崎 、、先A、 0療扣之基本架構為一椅具旁再配設有一漱 #以及^的高度和仰角來配科"·之椅背的高度 包括f _請參閱「第1圖」， t卜笛綠i 之狀恶下’固定拴〗04拴緊而壓迫壓掣件]OV， 動，使上方之頭枕6 + 口疋住而無法旋 診療的需求，於於療過r=rf的位置。然，為配合牙科醫師 刚鬆開，應掣中 = 周厂整病患頭部的位置，故將固定栓 搬，牙科醫師^壓迫第—轉軸⑼以及第二轉軸 • ^ ^ ^-#1, 102 1〇5 ^ 只要固定栓104„鬆開進行單獨的調整動作， 進行調整動作，不但造成巾貝扶住其中—端才可對另-端 師進行調整之動作時，也3的=方便’而牙科病患在牙科醫 而受到傷害。 Θ畀不舒適的感受，頸部也可能會因此 【新型内容】 爰是，本新型提出了一藉 能在於可單獨或是同時 ^療椅之頭枕調整機構，其功 牙科移療椅頭枕之高度以及仰角。 5 4 M275830 為貫現上述目的，這種牙科吟 施方案’包括了-上殼體、之頭枕調整機構的較佳實 制動機構、—上岐板以及—下固，、1-制動機構、—第二 二制動機構之基本架構相同 其”-制動機構與第 =、—卡掣部以及-按叙，藉由按壓動裝置、-固定 私動’而可控辦絲置的 〗卡手部職生的相對 之高度以及㈣虹殼進柯相調整頭枕 是早獨來使第-制動機構以及第二制 ’而可同時或M275830 M275830 Eight new types of instructions: [Technical field of new type] [Advanced technology] Chairs are pressed! Na accepts a dentist's diagnosis. The basic structure of the first A, 0 treatment buckle is a chair next to a chair The height and elevation angle of the shower # and ^ are equipped with "the height of the back of the chair includes f _ Please refer to" Figure 1 ", t the shape of the fu di green i's evil" fixed bolt〗 04 fastened and oppressed [Parameter] OV, move, make the upper headrest 6 + mouth suffocated and can not be diagnosed and treated, in the position of r = rf after treatment. However, in order to cooperate with the dentist's just loosening, the middle position of the patient's head should be adjusted. Therefore, the anchor is moved. The dentist ^ presses the first and second rotation shafts ^ ^ ^-# 1, 102 1〇5 ^ As long as the fixing bolt 104 is loosened for an independent adjustment action, the adjustment action is performed, which not only causes the towel to hold one of them-the end can only be adjusted to the other-the end teacher, also 3 = convenient ' And dental patients are injured in the dentist. Θ 畀 Uncomfortable feeling, the neck may also be caused by this [New content] 爰 Yes, the new model proposes a headrest that can be used alone or at the same time ^ The adjustment mechanism is the height and elevation of the headrest of the dental transfer chair. 5 4 M275830 In order to achieve the above purpose, this type of dental treatment program 'includes-the upper case, the better actual braking mechanism of the headrest adjustment mechanism. ——— Shangqi plate and—Lower solid, 1-brake mechanism, —the second and second brake mechanism have the same basic structure— “brake mechanism and the first =, — the latching part, and—as described, by pressing the moving device, -Fixed private action and controllable silk card And (iv) the relative height of the housing into Hong Ko headrest is adjusted earlier to only the first - and the second braking mechanism braking 'may be simultaneously or

^置為齒輪或是棘輪之設計，而讓、J，配合轉動 隨使用者或是醫師看診之需求而有^度⑽仰角的調整可 【實施方式】 ° 首先巧參閱「弟2圖」，一般的牙科铁疼 括有-頭枕1卜-椅背！2、—漱洗台13:二^ Set as a gear or ratchet design, and let, J, coordinated rotation with the user or the doctor's needs to adjust the ^ degree ⑽ elevation angle can be adjusted [implementation] ° First of all, please refer to the "Picture 2", General dental iron pain includes-headrest 1bu-chair back! 2.—Washstand 13: 2

=座鱼1二=新型的牙科診療椅之頭枕調整機構2。ίΪΙΪ r與^ 12之間，請配合參閱「第3圖」，可用 J η之兩度以及仰角以配合牙科醫師診療之需求。 正貝枕 接著請减「第4圖」，其中揭露了本新型所提出之牙 療椅之頭枕調整機構20的較佳實施例，包括一上殼體21、一0 殼體22、一第一制動機構23、一第二制動機構24、一上固定= 25以及一下固定板26。而此頭枕調整機構2〇則是藉由第一制動 機構23來調整頭枕11的高度，以及第二制動機構來調整頭 枕11的仰角。 I、 請配合參閱「第5-1圖」〜「第6-1圖」，此第一制動機構 23係包括有：一第一轉軸230、一第一轉動裝置231、一第—固 定部232、一第一卡掣部233以及一第一按鈕234。= 座 鱼 1 二 = New headrest adjustment mechanism 2 for dental chair. ίΪΙΪ r and ^ 12, please refer to "Figure 3" for cooperation. The two degrees of J η and the elevation angle can be used to meet the needs of the dentist's diagnosis and treatment. The Zhengbei pillow is then reduced to "Figure 4", which discloses a preferred embodiment of the headrest adjusting mechanism 20 of the dental chair proposed by the present invention, which includes an upper case 21, a 0 case 22, a first A braking mechanism 23, a second braking mechanism 24, an upper fixing = 25, and a lower fixing plate 26. The headrest adjusting mechanism 20 adjusts the height of the headrest 11 by the first braking mechanism 23 and the elevation angle of the headrest 11 by the second braking mechanism. I. Please refer to “Figure 5-1” to “Figure 6-1” for cooperation. The first braking mechanism 23 includes: a first rotating shaft 230, a first rotating device 231, and a first-fixing portion 232. A first latching portion 233 and a first button 234.

於此較佳實施例中，苐一轉動裝置231為—齒輪，且第一轉 動裝置231以第一轉軸230為軸心而轉動。另，第一按鈕234包 括一第一按鈕頭2340、一第一凸部2341、一第一頸縮部2342、 一第一頸部2343以及一第一底部2344。第一·^掣部233包括以 6 M275830 2了=23料接的—第—套環233G與—第-插鎖朋，且 々弟一棱才干2331上有一第一塵縮彈簧2332，而第—卡 ％ 第一棱桿2331固定於第一固定部232中。 第一轉動裝置231藉由第一卡掣部233來控制其是否 =-般狀:態下，第-套環233〇套合於第一按紐故的第；部 卡料233藉由自身的第—墨縮彈菁2332而能固 ί ，置，於此狀態下，後方的第—插鎖如 與弟一轉動裝置231卡合。 ^ S ΐ二_機構24與第—制動機構23之結構相同，故不 咖描述，係包括有:一第二轉軸240、-第二 第二固定部242、一第二卡擎部243以及 第 轉動裝置241 二按鈕244 h 佳實施例中，第二轉動衫241為—棘輪，另，第二 按鈕244包括-第二按_ 244〇、—第二凸部洲、一第 =部2442、—-第二頸部2443以及—第二底部顺。第二卡料、 鐵24^日:弟二橫桿2431連接的一第二套環2430與一第二插 为^二且弟一橫桿2431上有一第二壓縮彈簧2432。 於一^5動裝置241藉由第二卡掣部243來控制其動作狀態， 2^ ^了丄第二套環勘套合於第二按紅244的第二頸部 —卡擎部243藉由上方的第二_彈簧2432而能固 疋弗二卡掣部243之位置。 ^-制動機構23以及第二制動機構24藉由上固定板25和 下^ ：^26而固定住’並在其上下兩端分別蓋上上殼體21以及 I:又而上殼體21 #一按鈕蓋21。，將第-按-234以及 二，阳寺罩蓋住’而可藉由按壓按紐蓋210的右側、左 ,1^2 、來使第一制動機構23、第二制動機構24或是兩者一 起動作。In this preferred embodiment, the first rotating device 231 is a gear, and the first rotating device 231 rotates with the first rotating shaft 230 as an axis. In addition, the first button 234 includes a first button head 2340, a first convex portion 2341, a first necked portion 2342, a first neck portion 2343, and a first bottom portion 2344. The first part 233 includes 6-M275830 2 = 23 materials—the first ring 233G and—the first plug lock, and the first brother has a first dust shrink spring 2332, and the first —Card% The first prism 2331 is fixed in the first fixing portion 232. The first rotating device 231 controls whether or not it is in a normal state by the first latching part 233: In the state, the first collar 233 is fitted on the first button, and the first latch 233 is used by The second indentation bullet 2332 can be fixed, and in this state, the rear first latch is engaged with the first rotation device 231. ^ S ΐ 二 _ The structure of the mechanism 24 is the same as that of the first brake mechanism 23, so it will not be described, including: a second rotating shaft 240, a second second fixing portion 242, a second card engine portion 243, and a first Rotating device 241 Two buttons 244 h In the preferred embodiment, the second rotating shirt 241 is a ratchet, and the second button 244 includes a second pressing _ 2440, a second convex portion, a first portion 2442,- -The second neck 2443 and-the second bottom is smooth. Second clamp material, iron 24 ^ day: a second set of rings 2430 connected to the second crossbar 2431 and a second plug are connected to the second crossbar 2431 and a second compression spring 2432 is provided on the first crossbar 2431. In ^ 5, the moving device 241 controls its movement state by the second latching portion 243, and the second set of loops fits on the second neck of the second pressing red 244—the card engine portion 243. The position of the second latching portion 243 can be fixed by the second second spring 2432 above. ^ -The braking mechanism 23 and the second braking mechanism 24 are fixed by the upper fixing plate 25 and the lower ^: ^ 26, and the upper casing 21 and the upper casing 21 are respectively covered at the upper and lower ends thereof: I and the upper casing 21 # One button cover 21. , Cover the first-button -234 and the second, the temple cover, and you can make the first brake mechanism 23, the second brake mechanism 24, or both by pressing the right, left, 1 ^ 2 of the button cover 210. Move together.

J 「^實施例於使用之時，請配合參閱「第5-1圖」〜第5_3圖― 弟1圖」〜第6-4圖」以及「第7-1圖」〜第7-3圖」。首先 M275830 軸，咖_討。於正常之 之第-套環』。以頸= 轉動裝置231卡合，而士认丄,+一向弟插銷2333與弟一 齒輪之設計，目=^仏貫施例中第—轉動裝置231為 第一轉動^置^t轉動裝謂卡合時， 之位置。當使用者欲調敕 、呆持如「第7-1圖」所示 5-2圖」以及「禁6 /同正項枕之兩度時，再請配合參閱「第 即按以安二圖」第 仪力± Η守’弟一按鈕234之第_ 第-套環23 W第二頸縮部2342 --； 常狀態，使得第一套環2330再順著第一頸7 47 Μ至 合於第-頸部洲，第-抱m，# 2342之斜面再卡 而固定頭枕^之高度銷2333再與弟—轉動裝置231卡合， 4 魏可驢概11之㈣㈣24進行探 时。备凋}頭枕11之高度後，如「第Μ 以 :^卡掣部Μ之第二套環綱套合於第二頸 而弟二插銷2433與第二轉動裝置241卡合，而由於 ^中=!!動裝置241為棘輪之設計，因此當第二插銷24^盥 弟一轉動衣置241卡合時，第二轉動裝置241則僅能 。 3向轉動，使用者則可扳_枕„而調整m η = 可將頭枕11 *「第7-2圖」所示而調整為「第7_3圖」所示 置―;但由於此棘輪之設計，使用者無法朝箭頭所示的另一^； 動碩枕11之仰角，因此若使用者欲將頭枕u i 狀態時’再請配合參閱「第5-3圖」以及「第M圖角;周 按壓按紐蓋210之左侧，亦則安壓第二按知244時，第二=丑用= 8 M275830 之第一頸部2443則往下套入第二底部2444，使得第 部广2之斜面而卡合於第二凸部2441，如此動作 1後方之弟―簡2433朗部移動，而使料 周整獅回到「第7_2圖」 角 安壓第二按紐244，則第二按—回至正 二，：使付弟二套環243〇順著第二頸縮部2442之斜面再卡合 而二:：”3，接著第二插鎖2433與第二轉動裝置241卡合， 而固疋頭枕11之仰角。 r 而於此較佳實施例當中，第二制動機構2 ίΐ使^^的過程中’頭枕11之仰角僅能增加而不會突秋 二’使:病患之，易受到傷害;然而，熟悉此技術二 ^付。$轉動ι置23]以及第二轉動裝置冰可為 : 棘輪’皆可以達到調整頭枕u之高度以及仰角之目的、。心疋 —另，由於上殼體21有一按鈕蓋21〇之設計，將第一」 以及第二按紅244同時罩蓋住’因此除了可藉由按壓按紅甚 的右側或左側來使第-觸機構m = 11的高度以及仰角。 守凋正頭枕 综上所述，本新型之牙科診療椅之頭枕調整機 用第一制動機構23以及第二制動機構24的組合H = 於診療過程中藉由簡枕調整機構2G而可單 =科西師 枕11的高度以及仰角以配合診療之需求。一疋寸。周整頭 惟本新型雖以較佳實施例說明如上，然其並 型’任何熟習此技術人員，衫脫離本新型的 t本新 的更動與潤飾，仍應屬本新型的技術範考。 乾圍内所作 【圖式簡單說明】 · · 第1圖，繪示習知之牙 第2圖，緣示牙科診療椅頭枕調整機構的實施例構造。 療椅之示意圖。 、L凋整機構的實施例配置於牙科診 第3圖，料牙卿鱗 " 療椅之頭枕與椅背之間的干調整機構的實施例配置於牙科玲 第4 L牙科診療d圖: ^ 第5-卜5-3圖，績示牙科診2尤调整機構的實施例構造。 示意剖面圖。 ^可之頭枕調整機構的實施例之動作J "^ When the embodiment is used, please refer to" Figure 5-1 "to Figure 5_3-Brother 1" to Figure 6-4 "and" Figure 7-1 "to Figure 7-3 ". First of all, M275830 axis. In the normal "loop". The neck = the rotation device 231 is engaged, and the person recognizes the design of the + one brother pin 2333 and the brother one gear. The purpose of the first-rotating device 231 in the embodiment is the first rotation. Position when engaged. When the user wants to adjust, hold, as shown in "Figure 7-1, Figure 5-2" and "Forbidden 6 / two degrees of the same pillow, please refer to" the second figure to press the second button. " ”Diyili ± Η shou 'brother one button 234 of the first _-ring 23 W second neck constriction 2342-; normal state, so that the first ring 2330 and then along the first neck 7 47 Μ to close At the -neck continent, at the -hold m, # 2342, the slope was re-clamped, and the height pin 2333 of the fixed headrest was then engaged with the brother-rotating device 231. 4 Wei Ke donkey general 11 of 24 time exploration.备}} After the height of the headrest 11 is as follows, "The second ring is connected to the second neck with the second locking ring 24 and the second latch 2433 is engaged with the second rotating device 241. Middle = !! The moving device 241 is designed as a ratchet, so when the second latch 24 ^ is rotated and the clothes set 241 is engaged, the second rotating device 241 can only be used. The 3-way rotation, the user can pull the _ pillow „And adjusting m η = The headrest 11 *" Figure 7-2 "can be adjusted to the position shown in" Figure 7_3 "-but because of the design of this ratchet, the user cannot A ^; the elevation angle of the moving pillow 11, so if the user wants to change the headrest ui state, please refer to "Figure 5-3" and "Figure M angle; press the left side of the button cover 210, When the second press is known as 244, the second neck = ugly = 8 The first neck 2443 of M275830 is fitted down to the second bottom 2444, so that the slope of the first part 2 is engaged with the second convex part 2441, in this way, the younger brother behind Jane-Jan 2433 moves, and the material lion returns to the "Figure 7_2". Press the second button 244, and then press the second button to return to the second one. Two sets of rings 243 Follow the slope of the second necked portion 2442 and then engage two: "3", then the second latch 2433 engages with the second rotating device 241, and the elevation angle of the headrest 11 is fixed. R It is better here In the embodiment, during the process of the second braking mechanism 2 'the elevation angle of the headrest 11 can only increase without sudden fall', so that the patient is vulnerable to injury; however, familiar with this technology 。 [Rotating position 23] and the second rotating device ice can be: the ratchet 'can achieve the purpose of adjusting the height of the headrest u and the elevation angle. Heart palpitations-In addition, because the upper casing 21 has a button cover 21〇 design , The first "and the second press red 244 cover at the same time, so in addition to pressing the right or left side of the red to make the height of the first contact mechanism m = 11 and the elevation angle. As mentioned above, the combination of the first brake mechanism 23 and the second brake mechanism 24 for the headrest adjusting machine of the dental chair of the new type of dental diagnosis chair H = can be achieved by the simple pillow adjusting mechanism 2G during the diagnosis and treatment Single = the height and elevation angle of Kexi teacher pillow 11 to meet the needs of diagnosis and treatment. One inch. Zhou Zhengtou. Although the new model is described above with a preferred embodiment, but its type 'anyone who is familiar with this technology, the new changes and retouching of the shirt without the new model should still belong to the technical model of the new model. Made in Qianwei [Simplified illustration of the drawing] · · Fig. 1 shows a conventional tooth Fig. 2 shows an example structure of a headrest adjusting mechanism of a dental chair. Schematic diagram of the treatment chair. The embodiment of the L trimming mechanism is arranged in Figure 3 of the dental clinic, and the embodiment of the dry adjustment mechanism between the headrest and the back of the chair is arranged in the dental clinic. Figure 4D : ^ Fig. 5-b 5-3, showing the structure of an embodiment of the adjustment mechanism of the dental clinic 2 in particular. Schematic sectional view. ^ The operation of the embodiment of the adjustable headrest mechanism

第6-1〜6-4圖，繪示牙科診療 示意侧面剖面圖。 、 椅之頭枕調整機構的實施例之動作 第7_1〜7-3圖，繪示牙科診 頭枕上之動作示音圖。 、°碩杬調整機構的實施例配置於 【主要元件符號說明】Figures 6-1 to 6-4 show schematic cross-sectional side views of dental treatment. The operation of the embodiment of the chair's headrest adjustment mechanism Figures 7_1 to 7-3 show the operation sounds on the headrest in dental clinics. The embodiment of the 杬 ° 杬 adjustment mechanism is configured in [Description of Symbols of Main Components]

100 · 101 . 102 · 103 · 104 · 105 · 10 · 11 · 12 · 13 · 14 · 15 · 20 · 21 . 210 · ••碩枕調整機構 ••第一轉轴 ^ ···第二轉軸 ’ ···壓掣件 ^ .··固定栓 ^ · · ·頭枕 •··牙科診療椅 • ••頭枕 • ••椅背 •··漱洗台 • ••座墊 •.底座 •••頭枕調整機構 •··上殼體 •···按鈕蓋 10 M275830100 · 101. 102 · 103 · 104 · 105 · 10 · 11 · 12 · 13 · 14 · 15 · 20 · 21 · 210 · •• Sleep adjustment mechanism •• First rotating shaft ^ ··· Second rotating shaft ' ··· Pressing piece ^ ··· Fixing bolt ^ · · · Headrest ··· Dental examination chair • •• Headrest • •• Back of the seat • · Washing table ••• Seat cushion • .Base •• • Headrest adjustment mechanism ··· Top case ···· Button cover 10 M275830

^ · 9 9 Q 9 i s ·，· · *下殼體 23...... ......第制動機構 230 ..... 231..... ......第一轉動裝置 232 ..... ......第一固定部 233 ..... ......第一卡掣部 2330 ..... .......第一套環 2331 ..... .......第一橫桿 2332 · · · ·， .......第一壓縮彈簧 2333 ..... 234 ..... ......第一按钮 2340 ..... .......第一按鈕頭 2341 ..... .......第一凸部 2342 ..... .......第一頸縮部 2343 ..... .......第一頸部 2344 ..... .......第一底部 24..... .......第二制動機構 240 ..... ......第二轉軸 241..... ......第二轉動裝置 242 ..... ......第二固定部 243 ..... ......第二卡掣部 2430 - - ·- .......第二套環 2431 - - - · .......第二橫桿 2432 .... .......第二壓縮彈簧 2433 ··· · .......第二插銷 244 ..... ......第二按鈕 2440 ··· · .......第二按鈕頭 2441 ··· · .......第二凸部 2442 .... .......第二頸縮部 M275830 2443 ..... ......第二頸部 2444 ..... ......第一底部 25...... ......上固定板 26...... ......下固定板^ · 9 9 Q 9 is ·, · · * The lower case 23 ............ The braking mechanism 230 ..... 231 ........... 第A rotating device 232 ..... ... the first fixing portion 233 ..... ... the first latching portion 2330 ..... ... A set of rings 2331 ..... .. first cross bar 2332 · · · ·, .... first compression spring 2333 ..... 234 ..... ..... First button 2340 ..... ......... First button head 2341 ..... ... First convex portion 2342 ..... .. ..... First neck constriction 2343 ..... ... First neck 2344 ..... ... First bottom 24 ..... ... Second braking mechanism 240 ........... Second rotation shaft 241 ........... Second rotation device 242 ........ ... Second fixing portion 243 ........... Second latching portion 2430--·-......... Second collar 2431---... .. 2nd cross bar 2432 ..... 2nd compression spring 2433 ... 2nd latch 244 ..... ... Two-button 2440 ... Second button head 2441 ... Second projection 2442 ... Second necking Department M275830 2443 ..... ... Second Neck 2444 ... ........ First bottom 25 ............ Upper fixing plate 26 ............ Lower fixing plate

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Claims (1)

Μ275830 九、申請專利範圍·· L二種牙科診療椅之馳調整機構， 为之間，用以調整該牙科診療:衣牙科診療椅之頭枕以及椅 ;=_機構，該第—觸機，包括： 疋住，並在泫第一制動機構外 —口疋板以及一下固定板 2· —制動機構包括一第一轉軸、—二—上殼體以及一下殼體，.該第 第—卡挈部以及一第一按知，裝置、-第-固定部、一 時，促使固定於該第一固定部幾構藉由健該第-按鈕 5亥第-轉動裝置的固定以及轉了，掣部產生移動，進而控制 如申請專利範圍第】項所而可謂整該頭枕之高度。 更包括一第 二制動機構包括—第二^1牙=診療椅之頭枕的仰角，該第 f二卡零、及一第二：二轉動裝置、-第二固定部、一 促使固定於該第二固定部』機構藉由按塵該第二按叙 该第二轉動裝置的固定以及掣部產生移動’進而控制 ::r 範，—調=^^ 4 5.=專利範圍第1項所述之頭枕調整機構，其令該第—轉動裝置 65. 專利範圍第2項所述之頭枕調整機構，其中該第二轉動裝置 了6. 專利範圍第2項所述之頭枕調整機構，其中該第二轉動裝置 娜_，㈣该體上更設 住，而藉由該按鈕蓋可;:日按亡以及該第二按鈕罩蓋 鈕。 蜀或同日守按壓忒第一按鈕以及該第二按 13 8. M275830 一制動機構，該制動機構藉由一上固定板以及一下固定板固定住， 並在該制動機構外包覆一上殼體以及一下殼體；該制動機構包括一 轉軸、一轉動裝置、一固定部、^一^卜掣部以及一按鈕，該制動機構 藉由按慶該按叙時，促使固定於該固定部之該卡掣部產生移動，進 而控制該轉動裝置的固定以及轉動，而可調整該頭枕之仰角。 9·如申請專利範圍第8項所述之頭杬調整機構，其中該轉動裝置為齒 輪。 " ϊ〇·如申請專利範圍第8頊所述之頭敕 於。 、枕5周整機構，其中該轉動裝置為棘Μ275830 IX. Application scope of patents ... There are two types of dental chair adjustment mechanisms for adjusting the dental treatment: the headrest and chair of the dental chair; Including: Hold, and outside of the first brake mechanism-the mouth plate and the lower fixing plate 2-the brake mechanism includes a first shaft,-two-the upper case and the lower case, the first-card Part and a first press, the device, the -first-fixing part, for a while, urged the fixing to the first fixing part to be fixed and turned by the first-button 5th-rotating device, and the latch part was generated Move, and then control the height of the headrest as described in the scope of the patent application. It further includes a second braking mechanism including—the second ^ 1 tooth = the elevation angle of the headrest of the medical treatment chair, the fth second card zero, and the second: two turning devices, a second fixing portion, and a urge to be fixed to the The "second fixed part" mechanism controls the second rotating device and the movement of the second rotating device by pressing the dust to further control :: r 范 ， — 调 = ^^ 4 5. = The first scope of patent scope The headrest adjusting mechanism described above makes the first-rotating device 65. The headrest adjusting mechanism described in item 2 of the patent scope, wherein the second rotating device has the headrest adjusting mechanism described in item 6. Among them, the second rotating device Na_, and the body is more lively, and the button cover can be used ;: the day of death and the second button cover button. Shu or the same day press the first button and the second button 13 8. M275830 A braking mechanism, the braking mechanism is fixed by an upper fixing plate and a lower fixing plate, and an upper case is covered outside the braking mechanism And a lower case; the braking mechanism includes a rotating shaft, a rotating device, a fixing portion, a ^ bull button and a button, and the braking mechanism urges the fixing on the fixing portion by pressing the button when the button is pressed. The latching portion generates movement, thereby controlling the fixing and rotation of the rotating device, and the elevation angle of the headrest can be adjusted. 9. The head rest adjusting mechanism according to item 8 of the scope of patent application, wherein the rotating device is a gear. " ϊ〇 · As described in the scope of patent application No. 8 敕. , Pillow 5-round mechanism, where the rotating device is a ratchet 1414